Ic engine lecture 1
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The document discusses the basics of internal combustion (IC) engines. It describes IC engines as converting chemical energy from fuel into thermal and then mechanical energy. The working principle involves combustion occurring inside the engine cylinder, where high pressure and temperature gases exert force on the piston. A four stroke engine is then explained as intake, compression, power, and exhaust strokes. Key parts of a four stroke IC engine are also defined, including the piston, crankshaft, connecting rod, flywheel, valves, and spark plug. Applications mentioned are road vehicles, aircraft, and small machines.
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Bloom, billet, slab, plate, sheet, strip are terms used in metalworking and manufacturing. Blooms undergo first breakdown of ingots through hot working and have a large cross sectional area. Billets are further reduced through hot rolling. Slabs are hot rolled ingots with a specific cross sectional area and width. Plates are thick products over 6mm, while sheets are thinner but wide, and strips are thin and narrow. Blooms, billets, and slabs are considered semi-finished products.
Lapping process
Lapping is a surface finishing process that uses loose abrasive powders at low speeds to achieve very tight tolerances of flatness, parallelism, thickness, or finish. It involves mixing abrasive particles with a liquid to form a slurry, placing the slurry on a rotating lap plate, and placing the workpiece against the slurry-coated plate so the abrasive grains can modify the workpiece surface through rolling/sliding contact. A lapped surface exhibits a dull, non-reflective appearance with multi-directional texture, especially for hard materials with surface roughness under 5 micro-inches.
Injection moulding
Injection moulding is a manufacturing process that involves injecting material into a mould cavity. Common materials used include thermoplastics and thermosets. The injection moulding machine has components like a clamping unit, injection unit, mould, and heaters. It injects molten material into the mould, which then cools and hardens into the final shape before being ejected. Injection moulding is used to make a wide variety of plastic, rubber and metal parts.
Mechanism of gear shaping
Gear shaping is the process of manufacturing gears to precise specifications. It involves using a gear shaper machine with a single-point cutting tool that removes material from a gear blank as it rotates, forming the gear teeth. The cutting tool is fed into the rotating blank following a programmed path to generate the correct tooth profile and dimensions needed for the gear to mesh properly with a mating gear.
Mechanical press
This document discusses mechanical presses. It begins by defining a mechanical press as a machine that can perform cutting and non-cutting processes by applying force without removing chips from metallic or non-metallic sheets. It then outlines the main parts of a mechanical press, including the flywheel, clutch, brakes, driving mechanism, ram, and pitman. It classifies presses based on their power source, number of slides, and frame/construction. Finally, it states that mechanical presses are used for punching, stamping, forming, drawing, embossing, and bending operations in industries like automotive, aircraft, telecommunications, electrical appliances, and utensil making.
advantages of Hard chrome electroplating
Hard chrome electroplating involves applying a layer of chromium to a metal object through electroplating to provide benefits like reducing wear and damage from corrosion while increasing conductivity. The process starts with degreasing and cleaning the metal substrate before electroplating a hard chromium layer that is much more durable and provides superior hardness, lower friction, and improved anti-stick capabilities, making it suitable for applications involving drills, screws, taps and dies.
Drill machine
The document discusses a drill machine. It provides instructions for how to operate a drill machine safely and effectively. A drill machine is used to make holes in various materials like wood, metal, plastic and more. It allows users to control the speed and pressure applied for precise hole-making.
Properties of fluids
The document defines several key properties of fluids: density is defined as mass per unit volume and its SI unit is kg/m3; specific volume is the reciprocal of density and defined as volume per unit mass; specific gravity is the ratio of a fluid's density to a standard fluid like water, and is unitless; and specific weight is defined as weight per unit volume and has an SI unit of N/m3. The document also provides examples that water has a density of 1000 kg/m3 and mercury has a density of 13600 kg/m3.
Lecture on quality
The document discusses different definitions and goals of quality. It states that quality involves fitness for use, fitness for purpose, customer satisfaction, and conformance to requirements. It also defines quality as conformance to specifications according to Deming and conformance to requirements according to Crosby. Additionally, it defines quality as meeting customer needs and involving a company-wide system to ensure customer satisfaction at low cost through coordinated actions. Quality is also said to be inversely proportional to variations.
Emissions in engines
This document discusses different types of emissions from engines, including exhaust and non-exhaust emissions. It describes the key pollutants like unburnt hydrocarbons (HC), carbon monoxide (CO), oxides of nitrogen (NOx), particulate matter, and sulfur dioxide. The document explains the factors that influence emissions formation in spark ignition and compression ignition engines, such as fuel-air mixture, combustion temperature, and engine operating conditions. It also discusses the limitations of hydrocarbons and the processes that lead to HC and CO emissions from spark ignition engines.
Open channel flow
Open Channel Flow is a book written by Rampal Singh, who holds a B.E. in Mechanical Engineering, M.Tech in Production Engineering, and has qualified three times for the Graduate Aptitude Test in Engineering (GATE). The book covers topics related to open channel flow, which is the flow of liquids in rivers, streams, and other channels where the free surface is exposed to the atmosphere.
Zenith carburetor
The Zenith Carburetor has 8 main components: a float chamber, main line, main jet, compensating jet, starting jet, reservoir, choke, and throttle valve. It works by drawing fuel from the float chamber through the main jet at a low speed air to fuel ratio of 15:1. At high speeds, the compensating jet provides extra fuel required. During starting, the starting jet sprays fuel from the reservoir into the air above the throttle valve to form an 11:1 rich mixture, helping the engine start.
Engine performance
The document discusses engine performance and is authored by Rampal Singh, who has a B.E. in Mechanical Engineering, M.Tech in Production Engineering, and has qualified three times for GATE.
Fuel injection system in ci engine
The document discusses the basics of fuel injection systems in compression ignition (CI) engines. It outlines the key objectives of a fuel injection system which are to meter the correct amount of fuel demanded based on engine load and speed, distribute fuel equally among cylinders, inject fuel at the proper timing and rate, and ensure proper atomization. It also provides details on the typical injection timing window and angle. To achieve these objectives, the key functional components are identified as the pumping element to transport fuel, a metering element to control the fuel supply, a metering control to adjust the metering based on load/speed, and a distribution element to divide fuel evenly among cylinders. Finally, it lists some common types of fuel injection systems used in
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Null Bangalore | Pentesters Approach to AWS IAM
#Abstract:
- Learn more about the real-world methods for auditing AWS IAM (Identity and Access Management) as a pentester. So let us proceed with a brief discussion of IAM as well as some typical misconfigurations and their potential exploits in order to reinforce the understanding of IAM security best practices.
- Gain actionable insights into AWS IAM policies and roles, using hands on approach.
#Prerequisites:
- Basic understanding of AWS services and architecture
- Familiarity with cloud security concepts
- Experience using the AWS Management Console or AWS CLI.
- For hands on lab create account on [killercoda.com](https://killercoda.com/cloudsecurity-scenario/)
# Scenario Covered:
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- Exploiting IAM PassRole Misconfiguration
-Allows a user to pass a specific IAM role to an AWS service (ec2), typically used for service access delegation. Then exploit PassRole Misconfiguration granting unauthorized access to sensitive resources.
- Objective: Demonstrate how a PassRole misconfiguration can grant unauthorized access.
- Steps:
- Allow user to pass IAM role to EC2.
- Exploit misconfiguration for unauthorized access.
- Access sensitive resources.
- Exploiting IAM AssumeRole Misconfiguration with Overly Permissive Role
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- Objective: Show how overly permissive IAM roles can lead to privilege escalation.
- Steps:
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- Allow user to assume the role.
- Perform administrative actions.
- Differentiation between PassRole vs AssumeRole
Try at [killercoda.com](https://killercoda.com/cloudsecurity-scenario/)
An improved modulation technique suitable for a three level flying capacitor ...
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Data Driven Maintenance | UReason Webinar
Discover the latest insights on Data Driven Maintenance with our comprehensive webinar presentation. Learn about traditional maintenance challenges, the right approach to utilizing data, and the benefits of adopting a Data Driven Maintenance strategy. Explore real-world examples, industry best practices, and innovative solutions like FMECA and the D3M model. This presentation, led by expert Jules Oudmans, is essential for asset owners looking to optimize their maintenance processes and leverage digital technologies for improved efficiency and performance. Download now to stay ahead in the evolving maintenance landscape.
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6:个人职称评审加20分
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Ic engine lecture 1
- 1. Basics of IC Engines by Rampal Singh Assistant Professor Rai University, Ahmedabad B.E. (Mechanical), M.Tech (Production Engineering), Thrice GATE Qualified
- 2. Outline Heat engines and types Working principle Working of four stroke engine Parts of four stroke engine Applications
- 3. Engines (converts one form of energy into other) External combustion engine (combustion takes place outside) Internal Combustion Engine (combustion takes place inside)
- 4. Chemical energy (Fuel) Thermal Energy (burning of fuel) Useful work (mechanical energy) Working Principle
- 5. Working Principle • All the process takes place inside engine cylinder • High P,T gas produced will exert force on piston piston to convert it into mechanical energy
- 6. Working of four stroke Engine
- 8. Parts of four stroke Engine • Piston • In an engine, a piston transfers the expanding forces of gas to mechanical rotation of the crankshaft through a connecting rod. • Crankshaft • A crankshaft is a part that converts the reciprocating motion to rotational motion. • Connecting Rod • It transfers motion from a piston to crankshaft acting as a lever arm
- 9. Parts of four stroke Engine • Flywheel • The flywheel is a rotating mechanical device that is used to store energy. • Inlet and Outlet Valves • It allows us to enter fresh air with fuel & to exit the spent air-fuel mixture from the cylinder. • Spark Plug • It is a device that delivers electric current to the combustion chamber which ignites the air-fuel mixture leading to the abrupt expansion of gas.
- 10. Road vehicles (two wheeler, four wheeler) Aircrafts Small machines such as lawn movers, portable engine generators Applications of IC Engines