The document discusses the design and manufacturing of technical objects. It covers the materials that objects can be made from like wood, ceramics, metals, plastics and composites. It examines the properties and degradation of these materials. It also looks at technical drawings, including projections, engineering drawings and exploded views, which are used to design objects before manufacturing. Finally, it considers some of the issues in manufacturing technical objects from the materials.
Wallpapers offer one of the most innovative and easiest ways to glam up your home. Whatever the decor style, there are numerous wallpapers to fit the bill. A vintage look relies more heavily on classic designs like Rococo patterns.
This document provides information on writing argumentative and discursive essays. It explains that argumentative essays present arguments for both sides of an issue and take a clear stance, while discursive essays discuss controversies or issues by presenting both perspectives without taking a stance. The document advises that for both essay types, writers should choose a topic containing an argument, make a list of pros and cons, support their position and rebut the opposing views, and structure paragraphs to logically illustrate each argument.
The document discusses different materials including timber, metals, ceramics, plastics, and their properties. It classifies materials and describes how they are structured at a molecular level. Key properties explained include density, electrical resistivity, thermal conductivity, tensile strength, and more. The manufacturing processes for common materials like steel, glass and various plastics are also outlined.
The document provides details about the Materials Science course at Gazı University including the course outline, textbook, grading criteria, and chapter outlines for topics like the classification of materials, metals, ceramics, polymers, composites, and advanced materials. The course covers fundamental materials science concepts over 15 weeks and will evaluate students with midterm and final exams worth 60% and 40% of the grade respectively.
This presentation classifies and describes different types of materials:
1) Metals and alloys which have high strength and conductivity but are brittle. Examples include steel, aluminum, and copper.
2) Ceramics like concrete and pottery which are strong under compression but brittle. Examples include refractories and sensors.
3) Polymers or plastics which have lower strength but are lightweight and resistant to chemicals. Examples include polyethylene and epoxy.
4) Semiconductors like silicon that have electrical properties between conductors and insulators, enabling transistors and circuits.
5) Composite materials that combine materials for new properties, like carbon fiber reinforced plastics in aircraft.
- Medical implants are devices placed inside or on the body and include prosthetics to replace missing body parts, as well as devices that deliver medication, monitor body functions, or support organs and tissues. Responsive polymers are often used for implants due to their biocompatibility and ability to facilitate deployment or removal with minimal damage.
- Sporting equipment comes in various forms depending on the sport but is essential for play. Materials used for equipment must have properties like strength, ductility, and fatigue resistance. Composites are commonly used for equipment due to their lightweight and durable qualities.
- Electronic materials and devices have advanced through improvements to materials like semiconductors, dielectrics, and magnetic materials.
This document provides information about concrete beams and materials. It discusses:
- The types of forces and deformations that can act on materials, including compression, tension, torsion, deflection, shearing, elastic, plastic, and fracture.
- The five main categories of materials - wood, ceramics, metals, plastics, and composites.
- Key properties and behaviors of each material category, how they degrade, and how they can be protected.
- Tests that are commonly performed on concrete to ensure it meets specifications, including slump, air content, density, and compressive strength.
The document discusses various properties of materials including toughness, hardness, strength, elasticity, and plasticity. It describes different types of plastics like thermoplastics and thermosets, and how they are processed using injection molding, extrusion, and vacuum forming. Metals are divided into ferrous and non-ferrous categories. Ferrous metals include wrought iron, steel, and cast iron while non-ferrous metals discussed are copper, bronze, brass, aluminum, tin, lead, and their properties and uses.
Wallpapers offer one of the most innovative and easiest ways to glam up your home. Whatever the decor style, there are numerous wallpapers to fit the bill. A vintage look relies more heavily on classic designs like Rococo patterns.
This document provides information on writing argumentative and discursive essays. It explains that argumentative essays present arguments for both sides of an issue and take a clear stance, while discursive essays discuss controversies or issues by presenting both perspectives without taking a stance. The document advises that for both essay types, writers should choose a topic containing an argument, make a list of pros and cons, support their position and rebut the opposing views, and structure paragraphs to logically illustrate each argument.
The document discusses different materials including timber, metals, ceramics, plastics, and their properties. It classifies materials and describes how they are structured at a molecular level. Key properties explained include density, electrical resistivity, thermal conductivity, tensile strength, and more. The manufacturing processes for common materials like steel, glass and various plastics are also outlined.
The document provides details about the Materials Science course at Gazı University including the course outline, textbook, grading criteria, and chapter outlines for topics like the classification of materials, metals, ceramics, polymers, composites, and advanced materials. The course covers fundamental materials science concepts over 15 weeks and will evaluate students with midterm and final exams worth 60% and 40% of the grade respectively.
This presentation classifies and describes different types of materials:
1) Metals and alloys which have high strength and conductivity but are brittle. Examples include steel, aluminum, and copper.
2) Ceramics like concrete and pottery which are strong under compression but brittle. Examples include refractories and sensors.
3) Polymers or plastics which have lower strength but are lightweight and resistant to chemicals. Examples include polyethylene and epoxy.
4) Semiconductors like silicon that have electrical properties between conductors and insulators, enabling transistors and circuits.
5) Composite materials that combine materials for new properties, like carbon fiber reinforced plastics in aircraft.
- Medical implants are devices placed inside or on the body and include prosthetics to replace missing body parts, as well as devices that deliver medication, monitor body functions, or support organs and tissues. Responsive polymers are often used for implants due to their biocompatibility and ability to facilitate deployment or removal with minimal damage.
- Sporting equipment comes in various forms depending on the sport but is essential for play. Materials used for equipment must have properties like strength, ductility, and fatigue resistance. Composites are commonly used for equipment due to their lightweight and durable qualities.
- Electronic materials and devices have advanced through improvements to materials like semiconductors, dielectrics, and magnetic materials.
This document provides information about concrete beams and materials. It discusses:
- The types of forces and deformations that can act on materials, including compression, tension, torsion, deflection, shearing, elastic, plastic, and fracture.
- The five main categories of materials - wood, ceramics, metals, plastics, and composites.
- Key properties and behaviors of each material category, how they degrade, and how they can be protected.
- Tests that are commonly performed on concrete to ensure it meets specifications, including slump, air content, density, and compressive strength.
The document discusses various properties of materials including toughness, hardness, strength, elasticity, and plasticity. It describes different types of plastics like thermoplastics and thermosets, and how they are processed using injection molding, extrusion, and vacuum forming. Metals are divided into ferrous and non-ferrous categories. Ferrous metals include wrought iron, steel, and cast iron while non-ferrous metals discussed are copper, bronze, brass, aluminum, tin, lead, and their properties and uses.
This document discusses factors that affect the selection of materials used in pharmaceutical equipment construction. Physical properties like strength, mass, wear resistance, thermal conductivity and expansion, and ease of fabrication must be considered. Chemical factors like material contamination of products and corrosion resistance are also important. Economic factors like initial costs and maintenance costs influence material selection. A variety of metals are discussed including carbon steel, wrought iron, low-alloy steels, cast iron, and stainless steel grades. Stainless steel offers good corrosion resistance, heat resistance and is non-contaminating.
Plastic is a synthetic material made from organic polymers that can be molded into various shapes. There are two main types of plastics - thermoplastics and thermosetting plastics. Thermoplastics soften when heated and harden when cooled, allowing for remolding, while thermosetting plastics permanently harden during molding. Plastics can also be classified based on their structure, properties, and behavior when heated. Common plastics include polyethylene, PVC, and nylon, and they are used widely in products like containers, pipes, and electronics.
This document provides an overview of composite materials, including definitions, key components, types of composites, and applications. It defines a composite as a material made from two or more constituent materials combined to give unique properties. Composites consist of a reinforcement material, such as fibers, and a matrix that holds the reinforcements together. The document describes different types of reinforcements, matrices, and the roles they play in composites. It also outlines various composite material types and their applications in industries such as aerospace, automotive, marine, and consumer goods.
undamentals of Crystal Structure: BCC, FCC and HCP Structures, coordination number and atomic packing factors, crystal imperfections -point line and surface imperfections. Atomic Diffusion: Phenomenon, Fick’s laws of diffusion, factors affecting diffusion.
This document provides an overview of chemistry topics relevant to engineering, including:
- The chemistry of engineering materials, which classifies materials as metals (ferrous, non-ferrous) and non-metals (synthetic, natural). It describes common materials like steel, aluminum, plastics, ceramics, composites, wood, and rubber.
- Basic concepts of crystal structure, including crystalline vs amorphous structure and lattice structures.
- Polymers, including classifications based on source (natural, semi-synthetic, synthetic), thermal response (thermoplastic, thermosetting), and the polymerization process.
- Engineered nanomaterials, defined as having at least one dimension
Shape memory alloys have the ability to return to their original shape after deformation through heating or cooling. They exist in martensite and austenite phases and undergo a phase change between the two. Common shape memory alloys include nickel-titanium alloys. Applications include medical devices, toys, and aerospace components.
Metallic glasses are amorphous metal alloys produced through rapid cooling that prevents crystallization. They can be fabricated using melt spinning or other techniques. Metallic glasses have high strength and corrosion resistance due to their non-crystalline structure. Potential applications include reinforced composites, pressure vessels, and medical instruments.
This document is a report on engineering materials that was prepared by an engineering student at Al Azhar University in Egypt. It provides an introduction to engineering materials and discusses their historical uses. It describes how materials science developed with advances in physics and chemistry. It then classifies and describes different types of materials like metals, ceramics, polymers, and composites. The document focuses on properties of metals, defining terms like hardness, brittleness, malleability, ductility, elasticity, toughness, density, fusibility, and conductivity. It provides examples to illustrate each property.
This document provides revision notes for a Grade 11 Advanced CDI exam covering Materials and Fundamentals of Electronics. It includes instructions for the exam, specifying allowed materials and the exam structure. The document is then divided into sections on topics like mechanical properties, physical properties, metals and heat treatments, electrical circuits, components, and more. Key terms are defined for each section with explanations and examples. Diagrams and problems with solutions are also provided to illustrate concepts from the units.
THERMAL CONDUCTIVITY ANALYSIS IN VARIOUS MATERIALS USING COMPOSITE WALL APPAR...IAEME Publication
The document analyzes the thermal conductivity of various materials using a composite wall apparatus. Experiments were conducted by placing different material plates between a central mica heater plate and varying the voltage. Thermal conductivity was measured for mild steel, bakelite, wood, charcoal, and natural gum at voltages of 80V, 120V, and 160V. The results showed that natural gum has a thermal conductivity of 0 W/m-K, indicating it could be used as an insulating material. Charcoal has a consistent thermal conductivity of around 0.27 W/m-K. Bakelite, wood, and mild steel have higher thermal conductivities that increase with higher voltages. The document concludes that natural gum is suitable as an insulating
The document provides an introduction to engineering materials, including their classification and properties. It discusses how materials are composed of atoms that bond together through different types of bonds like ionic and covalent bonds. Materials are classified into families including metals, non-metals, and composites. Metals are further broken down into ferrous and non-ferrous categories. Key factors that influence material properties are also outlined, such as heat treatment, processing methods, and environmental reactions.
This document discusses materials science and various material properties. It begins by defining materials science and its focus on the internal structure and properties of materials. It then classifies and describes different types of materials like metals, ceramics, polymers, composites, and semiconductors. Various mechanical, thermal, electrical, and other properties of materials are outlined. The document emphasizes that material properties are important for engineering design and that the appropriate material must be selected based on fabrication, service, and economic requirements.
Materials can be grouped into classes based on their chemical composition and properties. The four main classes are metals, ceramics, polymers, and composites. Metals are combinations of metallic elements and alloys, and have properties of strength, ductility, and heat and electrical conductivity. Ceramics are inorganic materials processed at high temperatures and have properties of strength and corrosion resistance but are brittle. Polymers contain chemically bonded units and have properties of low density, strength and different optical properties. Composites contain two or more materials to produce new properties not found in the individual materials.
Material science and engineering is an interdisciplinary field that develops new materials and improves existing ones by understanding microstructure-composition-processing relationships. The field studies how a material's structure, synthesis, and processing affect its properties. Material scientists focus on underlying relationships between synthesis, processing, structure and properties, while material engineers translate materials into useful devices by controlling synthesis and processing to achieve desired structures and properties.
This document discusses different types of materials including manufactured goods, raw materials, wood, and metals. It provides details on their properties and how they are obtained and used. Regarding metals specifically, it notes that metals can be ferrous or non-ferrous, and that non-ferrous metals include heavy metals like lead, tin, zinc, copper, and light metals like aluminum and magnesium. The properties, sources, and uses of various metals are outlined.
Composite materials are a combination of two or more materials that result in properties superior to the individual components. They consist of a reinforcement phase, such as fibers, embedded within a binder or matrix phase. Composites offer advantages like high strength and stiffness with low weight. Common applications include aerospace, automotive, sports equipment and construction. The two main categories of composites are polymer matrix composites and metal matrix composites. Fiber reinforced polymers are the most widely used type and consist of fibers, such as glass, carbon or aramid, embedded in a polymer matrix.
Introduction to Mechanical Metallurgy (Our course project)Rishabh Gupta
The document summarizes key concepts in materials science and engineering. It discusses:
1. The importance of selecting high quality materials for better product design and performance.
2. The four main components in materials science - processing, structure, properties, and performance - and how they interrelate.
3. The main classes of materials - metals, ceramics, polymers, composites, semiconductors, and elastomers - and some of their key characteristics.
4. Crystal structures of metals and how they are classified based on atomic packing efficiency. Factors that determine a material's density are also covered.
The document discusses different ways of classifying matter and the physical properties used to classify materials. It describes density, strength, hardness, flexibility, conductivity, melting and boiling points as physical properties used to group materials. Materials are classified into five main classes: metals, plastics, glass, ceramics and fibres based on their properties. Choosing the right material depends on considering the function and desired properties of an object.
Elastomers are polymers that can undergo large elastic deformations when force is applied and then quickly recover their original shape when the force is removed. Their molecular chains are coiled like springs. When force is applied, the chains uncoil and stretch the material. Upon release of force, the chains recoil back to the original shape. Crosslinking the chains restricts viscous flow under force and allows the material to retain its elastic properties after many stretch-release cycles. The elasticity of an elastomer can be controlled by the amount of crosslinking, with more crosslinks producing a harder, stiffer material.
This document discusses solenoids and how to determine the magnetic field around them. It explains that a solenoid is a coil of wire that produces a magnetic field similar to a bar magnet when electric current flows through it. The right hand rule is used to determine the north and south poles of a solenoid by placing the hand at the positive end and orienting the thumb to point north. Examples are given to demonstrate how to apply the right hand rule to identify pole orientation in different solenoid setups.
This document discusses electromagnets and the factors that affect their magnetic fields. It explains that an electromagnet's magnetic field is produced by electric current flowing through a coil. The key factors that strengthen the magnetic field are:
1. Using a ferromagnetic core material like iron inside the coil
2. Increasing the number of loops or turns of wire in the coil
3. Increasing the electric current running through the coil
The document provides examples comparing different electromagnets based on variations in these factors, and explains that the magnetic force is calculated as the product of the current and number of turns.
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This document discusses factors that affect the selection of materials used in pharmaceutical equipment construction. Physical properties like strength, mass, wear resistance, thermal conductivity and expansion, and ease of fabrication must be considered. Chemical factors like material contamination of products and corrosion resistance are also important. Economic factors like initial costs and maintenance costs influence material selection. A variety of metals are discussed including carbon steel, wrought iron, low-alloy steels, cast iron, and stainless steel grades. Stainless steel offers good corrosion resistance, heat resistance and is non-contaminating.
Plastic is a synthetic material made from organic polymers that can be molded into various shapes. There are two main types of plastics - thermoplastics and thermosetting plastics. Thermoplastics soften when heated and harden when cooled, allowing for remolding, while thermosetting plastics permanently harden during molding. Plastics can also be classified based on their structure, properties, and behavior when heated. Common plastics include polyethylene, PVC, and nylon, and they are used widely in products like containers, pipes, and electronics.
This document provides an overview of composite materials, including definitions, key components, types of composites, and applications. It defines a composite as a material made from two or more constituent materials combined to give unique properties. Composites consist of a reinforcement material, such as fibers, and a matrix that holds the reinforcements together. The document describes different types of reinforcements, matrices, and the roles they play in composites. It also outlines various composite material types and their applications in industries such as aerospace, automotive, marine, and consumer goods.
undamentals of Crystal Structure: BCC, FCC and HCP Structures, coordination number and atomic packing factors, crystal imperfections -point line and surface imperfections. Atomic Diffusion: Phenomenon, Fick’s laws of diffusion, factors affecting diffusion.
This document provides an overview of chemistry topics relevant to engineering, including:
- The chemistry of engineering materials, which classifies materials as metals (ferrous, non-ferrous) and non-metals (synthetic, natural). It describes common materials like steel, aluminum, plastics, ceramics, composites, wood, and rubber.
- Basic concepts of crystal structure, including crystalline vs amorphous structure and lattice structures.
- Polymers, including classifications based on source (natural, semi-synthetic, synthetic), thermal response (thermoplastic, thermosetting), and the polymerization process.
- Engineered nanomaterials, defined as having at least one dimension
Shape memory alloys have the ability to return to their original shape after deformation through heating or cooling. They exist in martensite and austenite phases and undergo a phase change between the two. Common shape memory alloys include nickel-titanium alloys. Applications include medical devices, toys, and aerospace components.
Metallic glasses are amorphous metal alloys produced through rapid cooling that prevents crystallization. They can be fabricated using melt spinning or other techniques. Metallic glasses have high strength and corrosion resistance due to their non-crystalline structure. Potential applications include reinforced composites, pressure vessels, and medical instruments.
This document is a report on engineering materials that was prepared by an engineering student at Al Azhar University in Egypt. It provides an introduction to engineering materials and discusses their historical uses. It describes how materials science developed with advances in physics and chemistry. It then classifies and describes different types of materials like metals, ceramics, polymers, and composites. The document focuses on properties of metals, defining terms like hardness, brittleness, malleability, ductility, elasticity, toughness, density, fusibility, and conductivity. It provides examples to illustrate each property.
This document provides revision notes for a Grade 11 Advanced CDI exam covering Materials and Fundamentals of Electronics. It includes instructions for the exam, specifying allowed materials and the exam structure. The document is then divided into sections on topics like mechanical properties, physical properties, metals and heat treatments, electrical circuits, components, and more. Key terms are defined for each section with explanations and examples. Diagrams and problems with solutions are also provided to illustrate concepts from the units.
THERMAL CONDUCTIVITY ANALYSIS IN VARIOUS MATERIALS USING COMPOSITE WALL APPAR...IAEME Publication
The document analyzes the thermal conductivity of various materials using a composite wall apparatus. Experiments were conducted by placing different material plates between a central mica heater plate and varying the voltage. Thermal conductivity was measured for mild steel, bakelite, wood, charcoal, and natural gum at voltages of 80V, 120V, and 160V. The results showed that natural gum has a thermal conductivity of 0 W/m-K, indicating it could be used as an insulating material. Charcoal has a consistent thermal conductivity of around 0.27 W/m-K. Bakelite, wood, and mild steel have higher thermal conductivities that increase with higher voltages. The document concludes that natural gum is suitable as an insulating
The document provides an introduction to engineering materials, including their classification and properties. It discusses how materials are composed of atoms that bond together through different types of bonds like ionic and covalent bonds. Materials are classified into families including metals, non-metals, and composites. Metals are further broken down into ferrous and non-ferrous categories. Key factors that influence material properties are also outlined, such as heat treatment, processing methods, and environmental reactions.
This document discusses materials science and various material properties. It begins by defining materials science and its focus on the internal structure and properties of materials. It then classifies and describes different types of materials like metals, ceramics, polymers, composites, and semiconductors. Various mechanical, thermal, electrical, and other properties of materials are outlined. The document emphasizes that material properties are important for engineering design and that the appropriate material must be selected based on fabrication, service, and economic requirements.
Materials can be grouped into classes based on their chemical composition and properties. The four main classes are metals, ceramics, polymers, and composites. Metals are combinations of metallic elements and alloys, and have properties of strength, ductility, and heat and electrical conductivity. Ceramics are inorganic materials processed at high temperatures and have properties of strength and corrosion resistance but are brittle. Polymers contain chemically bonded units and have properties of low density, strength and different optical properties. Composites contain two or more materials to produce new properties not found in the individual materials.
Material science and engineering is an interdisciplinary field that develops new materials and improves existing ones by understanding microstructure-composition-processing relationships. The field studies how a material's structure, synthesis, and processing affect its properties. Material scientists focus on underlying relationships between synthesis, processing, structure and properties, while material engineers translate materials into useful devices by controlling synthesis and processing to achieve desired structures and properties.
This document discusses different types of materials including manufactured goods, raw materials, wood, and metals. It provides details on their properties and how they are obtained and used. Regarding metals specifically, it notes that metals can be ferrous or non-ferrous, and that non-ferrous metals include heavy metals like lead, tin, zinc, copper, and light metals like aluminum and magnesium. The properties, sources, and uses of various metals are outlined.
Composite materials are a combination of two or more materials that result in properties superior to the individual components. They consist of a reinforcement phase, such as fibers, embedded within a binder or matrix phase. Composites offer advantages like high strength and stiffness with low weight. Common applications include aerospace, automotive, sports equipment and construction. The two main categories of composites are polymer matrix composites and metal matrix composites. Fiber reinforced polymers are the most widely used type and consist of fibers, such as glass, carbon or aramid, embedded in a polymer matrix.
Introduction to Mechanical Metallurgy (Our course project)Rishabh Gupta
The document summarizes key concepts in materials science and engineering. It discusses:
1. The importance of selecting high quality materials for better product design and performance.
2. The four main components in materials science - processing, structure, properties, and performance - and how they interrelate.
3. The main classes of materials - metals, ceramics, polymers, composites, semiconductors, and elastomers - and some of their key characteristics.
4. Crystal structures of metals and how they are classified based on atomic packing efficiency. Factors that determine a material's density are also covered.
The document discusses different ways of classifying matter and the physical properties used to classify materials. It describes density, strength, hardness, flexibility, conductivity, melting and boiling points as physical properties used to group materials. Materials are classified into five main classes: metals, plastics, glass, ceramics and fibres based on their properties. Choosing the right material depends on considering the function and desired properties of an object.
Elastomers are polymers that can undergo large elastic deformations when force is applied and then quickly recover their original shape when the force is removed. Their molecular chains are coiled like springs. When force is applied, the chains uncoil and stretch the material. Upon release of force, the chains recoil back to the original shape. Crosslinking the chains restricts viscous flow under force and allows the material to retain its elastic properties after many stretch-release cycles. The elasticity of an elastomer can be controlled by the amount of crosslinking, with more crosslinks producing a harder, stiffer material.
Similar to Chapter 12 Manufacturing Technical Objects (20)
This document discusses solenoids and how to determine the magnetic field around them. It explains that a solenoid is a coil of wire that produces a magnetic field similar to a bar magnet when electric current flows through it. The right hand rule is used to determine the north and south poles of a solenoid by placing the hand at the positive end and orienting the thumb to point north. Examples are given to demonstrate how to apply the right hand rule to identify pole orientation in different solenoid setups.
This document discusses electromagnets and the factors that affect their magnetic fields. It explains that an electromagnet's magnetic field is produced by electric current flowing through a coil. The key factors that strengthen the magnetic field are:
1. Using a ferromagnetic core material like iron inside the coil
2. Increasing the number of loops or turns of wire in the coil
3. Increasing the electric current running through the coil
The document provides examples comparing different electromagnets based on variations in these factors, and explains that the magnetic force is calculated as the product of the current and number of turns.
The document discusses various topics related to manufacturing technical objects including:
- Guiding components which control the motion of moving parts and can provide translational, rotational, or helical motion.
- Degrees of freedom which describe the possible independent movements of parts.
- Technical drawings including projections, general arrangements, exploded views, details, dimensions, and developments.
- Manufacturing processes involving measuring, layout, machining, assembling, and finishing.
Mechanical engineering focuses on the design, production, analysis, and improvement of technical objects. This chapter discusses key topics in mechanical engineering including linking components, guiding motion, different types of motion transmission systems, and motion transformation. Guiding components control the motion of moving parts and can ensure translational, rotational, or helical motion. Motion transmission systems relay motion from one part to another and include gear trains, chain and sprocket systems, belt and pulley systems, and others. Motion transformation changes the type of motion and is achieved through systems like rack and pinion gears, screw gears, cam and follower mechanisms, and sliders.
This document discusses physical and chemical changes. It defines physical changes as changes that do not alter the chemical composition of a substance and are typically reversible, such as freezing or dissolving. Chemical changes alter the chemical composition by producing new substances, are not easily reversible, and result in changes like formation of a gas or precipitate, changes in color or mass. Examples of each type of change are provided along with signs that indicate whether a change is physical or chemical. Common chemical reactions like synthesis, decomposition, precipitation, and acid-base neutralization are also outlined.
This document defines key chemistry concepts including matter, mixtures, pure substances, elements, and compounds. It states that matter is anything that has mass and takes up space. Mixtures are combinations of two or more substances that are not chemically combined, while pure substances are either elements or compounds. Elements are the simplest forms of matter that cannot be broken down further, while compounds are formed by two or more elements that are chemically bonded together. The document provides examples of each term and guidelines for identifying elements and compounds based on changes in mass during chemical reactions.
The document summarizes the historical development of atomic structure models from ancient philosophers to modern atomic theory. It describes early continuous models proposed by Aristotle and Democritus' earliest concept of atoms. John Dalton established the foundations of modern atomic theory by proposing atoms as indivisible particles that combine in whole number ratios. J.J. Thomson's experiments led him to propose a "plum pudding" model with electrons embedded in a positive sphere. Rutherford determined atoms have a small, dense positively charged nucleus surrounded by electrons. Modern atomic structure incorporates discoveries by Bohr and Chadwick that atoms consist of a nucleus of protons and neutrons surrounded by electrons in shells.
This document provides information about moles, molar mass, and stoichiometry calculations. It defines a mole as the amount of substance containing 6.02 x 1023 particles and molar mass as the mass of one mole of a substance. Formulas are given for calculating molar mass from elemental compositions and for converting between mass and moles using molar mass. Examples show calculations of molar mass for compounds and conversions between grams and moles for different substances.
The document discusses key concepts about the periodic table including:
- Locating metals, nonmetals, and metalloids and identifying families such as alkali metals, alkaline earth metals, halogens, and inert gases.
- Describing properties of metals, nonmetals, and metalloids and how they differ.
- Explaining that periods indicate the number of electron shells an element has and families indicate the number of valence electrons.
- Identifying important families on the periodic table including alkali metals, alkaline earth metals, halogens, and inert gases.
Isotopes are atoms of the same element that have different numbers of neutrons. They have the same number of protons and electrons, so they have the same chemical properties. Some isotopes are stable while others are unstable and radioactive. Both stable and radioactive isotopes occur naturally, but radioisotopes are also produced artificially. Radioisotopes have important applications in medicine, industry, research and other areas due to their radioactive properties.
Rutherford's gold foil experiment led to a new atomic model. When alpha particles were fired at a thin gold foil, most passed through without deflection, showing atoms are mostly empty space. Some particles bounced straight back, indicating a small, dense nucleus. Others were slightly deflected, proving the nucleus has a positive charge and is the location of an atom's mass. This led Rutherford to propose an atomic model with a small, dense, positively charged nucleus surrounded by orbiting electrons.
The document describes the Bohr-Rutherford atomic model. It states that the atom consists of a small, dense nucleus containing protons and neutrons, surrounded by electrons in shells. The atomic number equals the number of protons, and a neutral atom has the same number of protons and electrons. Electrons are located in shells outside the nucleus, with the first shell holding 2 electrons and subsequent shells able to hold more. Diagrams illustrate atoms showing their arrangement of subatomic particles. Examples are provided of looking up atomic properties and drawing Bohr-Rutherford diagrams for different elements.
This document discusses J.J. Thomson and Ernest Rutherford's atomic models. It summarizes Thomson's cathode ray experiments that discovered the electron. Thomson believed atoms were a uniform positive sphere with electrons embedded in it. The document also describes Rutherford's model with a small, dense positive nucleus surrounded by electrons in orbit. It lists the key properties of cathode rays that revealed electrons are negatively charged and have mass.
This document discusses early atomic theories and models of matter. It describes the theories of Aristotle, who believed that matter was continuous with no empty spaces, and Democritus, who proposed that matter was discontinuous and could be divided into smaller particles called atoms. The document then focuses on John Dalton's atomic model from the early 1800s, which proposed that all matter is composed of atoms, atoms of the same element are identical, atoms of different elements differ, and atoms combine in chemical reactions. Dalton's model helped establish the foundations of modern atomic theory.
- A vector is a quantity that has both magnitude and direction, represented by an arrow.
- The magnitude (length) of a vector AB is written as ||AB|| and can be calculated as √((x2-x1)2 + (y2-y1)2) for vectors in the Cartesian plane.
- Common vector operations include addition, subtraction, scalar multiplication, and determining the resultant. Chasles' Rule states that AB + BC = AC.
- Vectors can be equal, opposite, collinear, orthogonal, or the zero vector (with magnitude 0 and no direction).
The document discusses the unit circle and trigonometric functions. It provides information on:
- The initial and terminal sides of angles on the unit circle
- The values of sine, cosine, and tangent in each quadrant of the unit circle
- Using Pythagorean theorem to determine values on the unit circle
- Definitions of sine, cosine, and tangent in terms of the x- and y-coordinates on the unit circle
- Rules for transforming basic sine and cosine functions
- Steps for solving trigonometric equations by taking the inverse sine or cosine of both sides.
The document defines trigonometric functions using right triangles and the unit circle. It lists properties of the trig functions including domain, range, period, formulas, and identities. It also covers inverse trig functions, the laws of sines, cosines, and tangents, and the unit circle.
This document discusses trigonometric identities and how to prove trigonometric statements. It covers basic trigonometric ratios and inverse ratios. It then presents three important trigonometric identities: 1) sin^2(θ) + cos^2(θ) = 1, 2) 1 + tan^2(θ) = sec^2(θ), and 3) 1 + cot^2(θ) = csc^2(θ). It provides examples of proving identities by simplifying expressions using basic identities, operations, and factoring. It also includes sample exam questions on proving an identity and determining an equivalent expression for tan(A) + cot(A).
This document covers trigonometric functions including ratios, identities, and tables of trig values. It introduces radians as another way to measure angles and compares radians to degrees. Formulas are provided for converting between radians and degrees as well as calculating arc length. Examples demonstrate using radians with trig functions and finding arc lengths. The document concludes with activities involving solving problems related to trig ratios, arc measures, and conversions between radians and degrees.
The document discusses parabolas and their key properties. A parabola is defined as the locus of points equidistant from a focal point and directrix. The document provides the standard form equations of parabolas with their focal points located at various positions, and explains that transformed parabolas can be defined with shifts in the x and y variables. Examples are given of how to determine if a point lies inside or outside the parabola bounds. Two exam questions are presented where the correct answer is a parabola, due to the geometric description matching that of a parabola.
Philippine Edukasyong Pantahanan at Pangkabuhayan (EPP) CurriculumMJDuyan
(𝐓𝐋𝐄 𝟏𝟎𝟎) (𝐋𝐞𝐬𝐬𝐨𝐧 𝟏)-𝐏𝐫𝐞𝐥𝐢𝐦𝐬
𝐃𝐢𝐬𝐜𝐮𝐬𝐬 𝐭𝐡𝐞 𝐄𝐏𝐏 𝐂𝐮𝐫𝐫𝐢𝐜𝐮𝐥𝐮𝐦 𝐢𝐧 𝐭𝐡𝐞 𝐏𝐡𝐢𝐥𝐢𝐩𝐩𝐢𝐧𝐞𝐬:
- Understand the goals and objectives of the Edukasyong Pantahanan at Pangkabuhayan (EPP) curriculum, recognizing its importance in fostering practical life skills and values among students. Students will also be able to identify the key components and subjects covered, such as agriculture, home economics, industrial arts, and information and communication technology.
𝐄𝐱𝐩𝐥𝐚𝐢𝐧 𝐭𝐡𝐞 𝐍𝐚𝐭𝐮𝐫𝐞 𝐚𝐧𝐝 𝐒𝐜𝐨𝐩𝐞 𝐨𝐟 𝐚𝐧 𝐄𝐧𝐭𝐫𝐞𝐩𝐫𝐞𝐧𝐞𝐮𝐫:
-Define entrepreneurship, distinguishing it from general business activities by emphasizing its focus on innovation, risk-taking, and value creation. Students will describe the characteristics and traits of successful entrepreneurs, including their roles and responsibilities, and discuss the broader economic and social impacts of entrepreneurial activities on both local and global scales.
Chapter wise All Notes of First year Basic Civil Engineering.pptxDenish Jangid
Chapter wise All Notes of First year Basic Civil Engineering
Syllabus
Chapter-1
Introduction to objective, scope and outcome the subject
Chapter 2
Introduction: Scope and Specialization of Civil Engineering, Role of civil Engineer in Society, Impact of infrastructural development on economy of country.
Chapter 3
Surveying: Object Principles & Types of Surveying; Site Plans, Plans & Maps; Scales & Unit of different Measurements.
Linear Measurements: Instruments used. Linear Measurement by Tape, Ranging out Survey Lines and overcoming Obstructions; Measurements on sloping ground; Tape corrections, conventional symbols. Angular Measurements: Instruments used; Introduction to Compass Surveying, Bearings and Longitude & Latitude of a Line, Introduction to total station.
Levelling: Instrument used Object of levelling, Methods of levelling in brief, and Contour maps.
Chapter 4
Buildings: Selection of site for Buildings, Layout of Building Plan, Types of buildings, Plinth area, carpet area, floor space index, Introduction to building byelaws, concept of sun light & ventilation. Components of Buildings & their functions, Basic concept of R.C.C., Introduction to types of foundation
Chapter 5
Transportation: Introduction to Transportation Engineering; Traffic and Road Safety: Types and Characteristics of Various Modes of Transportation; Various Road Traffic Signs, Causes of Accidents and Road Safety Measures.
Chapter 6
Environmental Engineering: Environmental Pollution, Environmental Acts and Regulations, Functional Concepts of Ecology, Basics of Species, Biodiversity, Ecosystem, Hydrological Cycle; Chemical Cycles: Carbon, Nitrogen & Phosphorus; Energy Flow in Ecosystems.
Water Pollution: Water Quality standards, Introduction to Treatment & Disposal of Waste Water. Reuse and Saving of Water, Rain Water Harvesting. Solid Waste Management: Classification of Solid Waste, Collection, Transportation and Disposal of Solid. Recycling of Solid Waste: Energy Recovery, Sanitary Landfill, On-Site Sanitation. Air & Noise Pollution: Primary and Secondary air pollutants, Harmful effects of Air Pollution, Control of Air Pollution. . Noise Pollution Harmful Effects of noise pollution, control of noise pollution, Global warming & Climate Change, Ozone depletion, Greenhouse effect
Text Books:
1. Palancharmy, Basic Civil Engineering, McGraw Hill publishers.
2. Satheesh Gopi, Basic Civil Engineering, Pearson Publishers.
3. Ketki Rangwala Dalal, Essentials of Civil Engineering, Charotar Publishing House.
4. BCP, Surveying volume 1
How to Make a Field Mandatory in Odoo 17Celine George
In Odoo, making a field required can be done through both Python code and XML views. When you set the required attribute to True in Python code, it makes the field required across all views where it's used. Conversely, when you set the required attribute in XML views, it makes the field required only in the context of that particular view.
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UPRAHUL
This Dissertation explores the particular circumstances of Mirzapur, a region located in the
core of India. Mirzapur, with its varied terrains and abundant biodiversity, offers an optimal
environment for investigating the changes in vegetation cover dynamics. Our study utilizes
advanced technologies such as GIS (Geographic Information Systems) and Remote sensing to
analyze the transformations that have taken place over the course of a decade.
The complex relationship between human activities and the environment has been the focus
of extensive research and worry. As the global community grapples with swift urbanization,
population expansion, and economic progress, the effects on natural ecosystems are becoming
more evident. A crucial element of this impact is the alteration of vegetation cover, which plays a
significant role in maintaining the ecological equilibrium of our planet.Land serves as the foundation for all human activities and provides the necessary materials for
these activities. As the most crucial natural resource, its utilization by humans results in different
'Land uses,' which are determined by both human activities and the physical characteristics of the
land.
The utilization of land is impacted by human needs and environmental factors. In countries
like India, rapid population growth and the emphasis on extensive resource exploitation can lead
to significant land degradation, adversely affecting the region's land cover.
Therefore, human intervention has significantly influenced land use patterns over many
centuries, evolving its structure over time and space. In the present era, these changes have
accelerated due to factors such as agriculture and urbanization. Information regarding land use and
cover is essential for various planning and management tasks related to the Earth's surface,
providing crucial environmental data for scientific, resource management, policy purposes, and
diverse human activities.
Accurate understanding of land use and cover is imperative for the development planning
of any area. Consequently, a wide range of professionals, including earth system scientists, land
and water managers, and urban planners, are interested in obtaining data on land use and cover
changes, conversion trends, and other related patterns. The spatial dimensions of land use and
cover support policymakers and scientists in making well-informed decisions, as alterations in
these patterns indicate shifts in economic and social conditions. Monitoring such changes with the
help of Advanced technologies like Remote Sensing and Geographic Information Systems is
crucial for coordinated efforts across different administrative levels. Advanced technologies like
Remote Sensing and Geographic Information Systems
9
Changes in vegetation cover refer to variations in the distribution, composition, and overall
structure of plant communities across different temporal and spatial scales. These changes can
occur natural.
This presentation was provided by Racquel Jemison, Ph.D., Christina MacLaughlin, Ph.D., and Paulomi Majumder. Ph.D., all of the American Chemical Society, for the second session of NISO's 2024 Training Series "DEIA in the Scholarly Landscape." Session Two: 'Expanding Pathways to Publishing Careers,' was held June 13, 2024.
Walmart Business+ and Spark Good for Nonprofits.pdfTechSoup
"Learn about all the ways Walmart supports nonprofit organizations.
You will hear from Liz Willett, the Head of Nonprofits, and hear about what Walmart is doing to help nonprofits, including Walmart Business and Spark Good. Walmart Business+ is a new offer for nonprofits that offers discounts and also streamlines nonprofits order and expense tracking, saving time and money.
The webinar may also give some examples on how nonprofits can best leverage Walmart Business+.
The event will cover the following::
Walmart Business + (https://business.walmart.com/plus) is a new shopping experience for nonprofits, schools, and local business customers that connects an exclusive online shopping experience to stores. Benefits include free delivery and shipping, a 'Spend Analytics” feature, special discounts, deals and tax-exempt shopping.
Special TechSoup offer for a free 180 days membership, and up to $150 in discounts on eligible orders.
Spark Good (walmart.com/sparkgood) is a charitable platform that enables nonprofits to receive donations directly from customers and associates.
Answers about how you can do more with Walmart!"
Gender and Mental Health - Counselling and Family Therapy Applications and In...PsychoTech Services
A proprietary approach developed by bringing together the best of learning theories from Psychology, design principles from the world of visualization, and pedagogical methods from over a decade of training experience, that enables you to: Learn better, faster!
Leveraging Generative AI to Drive Nonprofit InnovationTechSoup
In this webinar, participants learned how to utilize Generative AI to streamline operations and elevate member engagement. Amazon Web Service experts provided a customer specific use cases and dived into low/no-code tools that are quick and easy to deploy through Amazon Web Service (AWS.)
2. Humans have always invented and
produced objects that have helped them
survive and live more comfortably.
Today, technology is fundamental to the
entire process of designing,
manufacturing, maintaining, and repairing
objects and systems.
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3. Chapter 12
Manufacturing Technical Objects
There have been many inventions that have
improved the quality of our lives. We will refer
to these inventions as technical objects.
A number of issues must be considered when
designing and manufacturing these technical
objects.
In this chapter we will look at:
1. Materials and their properties
2. Technical Drawings
3. Manufacturing of the objects
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4. 1. Materials
All technical objects are made of
materials
A technical object to be must be designed
to withstand the constraints and
deformations that it experiences during its
normal use.
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5. 1.1 Constraints and Deformations
Constraints are the different types of
stresses that a material experiences as a
result of the forces applied to it.
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10. 1.3 Degradation and Protection
The degradation of a material is the
decline in some of its properties due to the
effects of the surrounding environment.
The protection of a material is the
application of procedures that prevent or
delay its degradation.
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12. 2. Categories of Materials and
their Properties
Let’s have a closer look at the following
materials and their properties:
1. Wood and Modified Wood
2. Ceramics
3. Metals and Alloys
4. Plastics
5. Composites
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13. 2.1 Wood and Modified Wood
Wood is a material obtained by harvesting
and processing trees.
Hardwood comes from deciduous trees
such as maple, oak, and birch
Softwood comes from coniferous trees
such as spuce, pine and fir.
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14. Properties of Wood
The mechanical properties depend on the type
of wood and vary due to:
1. The species of tree
2. The speed of growth
3. The water content of the wood
Other properties of wood that may influence
the choice of this material include:
1. Aesthetic appeal
2. Hardness, elasticity, resilience, and toughness
3. Low thermal and electrical conductivity
4. Ease with which it can be worked
5. Its colours
6. Its lightness relative to its strength
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15. Modified Wood
Modified wood is treated wood or wood
made from wood mixed with other
substances.
Common products include plywood,
particle board and fibreboard
These are sheets, chips, or fibres of wood
that are glued together in sheets.
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16. Degradation and Protection of Wood
Unprotected wood can degrade swiftly.
Since wood is an organic substance, many fungi,
microorganisms, and insects can infest the wood, feed
off it and cause it to rot.
Wood can be painted, stained, varnished or treated with
other protective coatings to help prevent its deterioration.
Treated wood is made resistant to rot by:
Dipping it in an alkaline solution containing copper. This
wood usually has a greenish colour.
Heating it to a high temperature.
Some woods, such a cedar, have a nature resistance
to rot.
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17. 2.2 Ceramics
A ceramic is a solid material obtained by
heating inorganic matter containing
various compounds, usually oxides.
When the raw material is heated, the
water evapourates, and the bonds
between the constituent compounds are
rearranged. A ceramic is always solid at
room temperature.
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18. Traditionally, most ceramic objects were
made out of clay and sand. Sand is used
for making glass.
Although other materials are now used,
clay and sand are still widely used as they
are both plentiful and inexpensive.
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19. Properties of Ceramics
The properties of ceramic objects vary with the
raw material and the method of baking.
The following properties make ceramics a good
choice for many objects:
Low electrical conductivity – used as insulators
High degree of hardness – used as building materials
and cutting tools
Heat resistance and low thermal conductivity – dishes
and cookware as well as thermal insulators
Resistance to corrosion – used in ducts for fumes or
water
Fragility – most are very fragile, but some can be
made so resilient they are used in engines
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20. The Degradation and Protection of
Ceramics
Although ceramics are generally very durable,
some acids and bases can have a degrading
effect on them
Archeologists have found ceramic pieces that
are thousands of years old and are still in
remarkably good condition.
Glazes can be used to protect the ceramics
A thermal shock (a sudden change in
temperature) can cause damage to a ceramic
object.
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21. 2.3 Metals and Alloys
A metal is a material extracted from a
mineral ore. Metals are usually shiny in
appearance and are good conductors of
heat and electricity.
The pure metal is rarely used.
An alloy is a mixture of a metal with one
or more other substances, which may be
metallic or nonmetallic. The mixture of
materials results in more desirable
properties.
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22. There are two main types of alloys:
Ferrous alloys whose main component is
iron.
Nonferrous alloys whose main component is
a metal other than iron
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24. The Degradation and Protection of Metals
and Alloys
The main cause for metal and alloy degradation
is oxidation, where the material reacts with
oxygen. This is commonly referred to as rusting.
The material can be protected by coating it with
a substance that isolates it from the oxygen in
the air:
Metallic coatings: zinc, chrome, gold, silver, nickel,
aluminum, lead
Other coatings: paint, enamel, grease, resin
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25. Techniques That Enhance the Properties of
Metals and Alloys
Steel heat treatments are methods of
enhancing certain mechnical properties of steel
through periods of heating.
These methods include:
Quench hardening – hardens the steel
Tempering – hardens the steel
Annealing – returns the original properties by
removing the stress created by deforming (welding)
All of these methods work by rearranging the
crystals within the material
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27. 2.4 Plastics
Plastics are made from fossil fuels
(petroleum and natural gas)
Monomers are extracted from the fossil
fuels and are arranged into long chains
called polymers.
Plastic is a material made of polymers, to
which other substances may be added to
obtain certain desirable properties.
The invention of plastics lead to a
revolution in world of materials
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28. Types of Plastics
A thermoplastic is a plastic that becomes soft
enough when heated to be moulded or
remoulded and that hardens enough when
cooled to hold its shape.
Most plastic objects are made of this type.
Most thermoplastics can be recycled
A thermosetting plastic is a plastic that
remains permanently hard, even when heated.
Often harder and more resilient than thermoplastics
Include melamine and polyesters
Cannot be recycled in Quebec
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29. The Degradation and Protection of Plastics
Plastics tend to degrade over time. This
process is usually slow, but can be
detected as cracks and changes in colour
appear.
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30. 2.5 Composites
A composite is formed by combining materials
from different categories to obtain a material
with enhanced properties.
A composite has two main parts: the matrix and
the reinforcement.
The matrix is the body of the material. It
surrounds and supports the reinforcement and
gives the object its shape.
The reinforcement is inserted into the matrix to
strengthen the object.
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32. The Degradation and Protection of
Compsites
The degradation of composites usually
takes one of two forms:
1. The deformation or fracture of the matrix or the
reinforcement.
2. The loss of adherence between the matrix and
the reinforcement.
The speed of degradation depends on
the type of matrix and reinforcement and
the conditions of use.
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34. 3. Technical Drafting
Before a technical object can be
manufactured, its shape and dimensions
must be determined. A technical drawing
must be created.
Technical drawings can be made by hand
or on a computer.
To understand these drawings, we must
be able to recognize and analyze different
projections.
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35. 3.1 Projections
A projection is the representation of a
three-dimensional object on a two-
dimensional surface.
Two of the most commonly used
projections are:
1. isometric
2. multiview.
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36. Isometric Projections
A drawing is an isometric projection if the
lines representing the length, width, and
height make angles of 60° or 120°.
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37. Multiview Projections
In a multiview projection, each face of the
object is drawn separately looking at it
from straigh on. Usually only the top, front
and right side of the object are illustrated.
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38. Isometric projections show the object in
perspective. It represents the three
dimensions of the object in a single
drawing.
Multiview projections usually provide
greater detail without distortion.
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39. 3.2 Engineering Drawings
A general arrangement is a technical
drawing representing the overall
appearance on an object.
It usually includes the top, front, and right
side multiviews as well as an isometric
projection drawn to scale.
The general arrangement will also include
a title block showing important
information about the object
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41. Exploded Views
An exploded view is a drawing in which
the various parts of the object are
separated from one another so as to more
easily visualize the componet parts of the
object.
The drawing will use an isometric
projection drawn to scale.
The is accompanied by a list of parts
indicating their names and the number of
each part required.
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43. Detail Drawings
A detail drawing is a drawing specifying
all of the relevant information for
manufacturing a part. It is almost always
drawn to scale.
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44. Dimensional Tolerances
Since machines, tools, instruments, and
the operators of machines are not perfect,
the manufactured parts may be slightly
different from the dimensions indicated on
the drawing.
A dimensional tolerance is an indicator
of the maximum acceptable difference
between a specified measurement and the
actual measurement on the finished
object.
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45. If the dimensional tolerance applies to all
of the parts on a diagram, it may be
indicated in the title block.
It can also be applied to a single part and
indicated as shown in the diagram.
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46. Functional Dimensioning
The functional dimensioning of a
drawing specifies the information required
for the object to work.
For example, the play required for a blade
to slide freely in a utility knife is shown as
the space between the blade and the
guide.
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48. Developments
A development is the representation of
the surface area required to make a part
by bending.
Sheet metal is often used to manufacture
a technical object. The development
shows the surface area of the material as
well as the lines where the sheet will be
bent.
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50. 3.3 Diagrammatic Representations
A diagram is a simplified representation of an
object, a part of an object, or a system.
Diagrams are used to help explain an object’s
operating principals as well as any other
characteristics that must considered during the
manufacturing process.
Depending on the type of information that a
drafter wishes to display, one of the following
common diagrams will be chosen:
Design Plan
Technical Diagram
Circuit Diagram
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57. 4. Manufacturing: Tools and
Techniques
Once the materials have been choosen and the
plans have been drawn, the object must be
manufactured.
Manufacturing is a series of operations
resulting in the creation of a technical object.
The various steps in the manufacturing of an
object require the use of various instuments.
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58. A tool is and instrument used in the
manufacture of an object.
A hand tool is powered by human force.
A machine tool is powered by forces
other than human.
The manufacturing process is usually
divided into three parts:
1. Measuring and laying out the parts
2. Machining the parts
3. Assembling and finishing the parts
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59. 4.1 Measuring and Laying Out
The information needed for the
manufacturing of an object can be found
in the detailed drawings of the object, or
on its manufacturing process sheet.
The manufacturing process sheet is a
document describing a series of operation
to perform in the manufacturing of a given
part and listing the materials and tools
required.
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60. Measuring out is the act of determining
the size or position of a marking.
Laying out is the act of tracing markings
or reference points onto a material.
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61. 4.2 Machining
Machining consists of shaping a material
into a desired configuration.
The first step in machining a part is to cut
it out roughly into its approximate shape.
The most commons techniques used in
this step are cutting, drilling, tapping,
threading, and bending.
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62. Cutting consists of giving a material a desired
shape.
Drilling consist of making a hole in a material.
Tapping is a machining technique in which
screw threads are formed inside holes drilled
into a material.
Threading is a machining technique in which
screw threads are formed around a rod.
Bending is a machining technique in which a
material is curved into a certain shape.
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63. Inspection
Throughout the machining phase, the
parts are measured and inspected to
ensure that they match the required
specifications.
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64. 4.3 Assembling and Finishing
Assembling is a set of techniques by which
various parts are united to form a complete
technical object. Techniques used for
assembling include: nailing, screwing, bonding,
riveting, bolting, and welding.
Finishing is a set of techniques that complete
the manufacture of the parts of a technical
object. The finish protects the materials from
the elements and enhances the appearance of
the object. Finishing techniques include:
painting, vanishing, staining, and polishing.
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66. Review
Observatory: The Environment
Page 421, Review Questions A to D
Credits
All images are from:
Observatory: The Environment
Editions du Renouveau Pedagogique Inc