The document discusses the field of mechanical engineering. It begins with defining engineering as using science to solve practical problems. It then lists some common engineering fields, with a focus on mechanical engineering. Mechanical engineering involves designing mechanical devices and systems, and utilizes concepts like thermodynamics, materials science, and fluid mechanics. The document outlines the basic foundations of mechanical engineering education, including studying properties of materials and performing tests like tensile, hardness, and fatigue testing. It also discusses thermodynamics and steam engines.

1. Mechanical Engineering
by
Dr Rajesh Kumar

2. Contents:
 What is Engineering
 Introduction of Mechanical Engineering
 Structure of Mechanical Engineering
 Basic Mechanical Engineering
 Thermodynamics
 Steam engine

3. “What is Engineering”
• An engineer is a person who uses scientific
knowledge to solve practical problem.
• Engineers create new things and make old
things better.

4. What are the Different Fields in
Engineering?  Mechanical
 Electrical
 Computer/ IT
 Mechanical
 Civil
 Aerospace
 Petroleum and Chemical
 Industrial
 Acoustics
 Biomedical
 Materials
 Nuclear
 Agricultural
 Environmental

5. Mechanical Engineering
 Mechanical engineering is one of broadest
studies in engineering
 The design and creation of mechanical
technologies that benefit society
 They utilize power to work with all types of
mechanical devices, and all types of
manufacturing and plant designs

6. Foundations in Mechanical
Mathematics
Physics
Thermodynamics
and heat transfer
Materials science
Gears and systems
Fluid mechanics
Structural Analysis

7. Basic Mechanical Engineering

8. Scheme:

9. Syllabus

10. Classifications of materials:
1. Ferrous
2. Non Ferrous

11. Common Mechanical properties:

12. Mechanical property testing:
1. Destructive (specimen broken)
2. Non destructive (specimen not broken)
Testing methods:
 Full scale prototype product (ON SITE)
 Small scale specimen in laboratory

13. Most common tests:
 Tensile test
 Compression test
 Shear and bending test
 Torsion test
 Hardness test
 Impact test
 Fatigue test
 Creep test

14. TENSILE TEST:
Machine used- Tensometer
UNIVERSAL TESTING MACHINE

15. SPECIMAN:
 Specimen is prepared according to ASTM.
 Or BIS (Indian standard)
 Cross section may be circular or rectangular

16. COMPRESSION TEST:
Machine used- Tensometer
UNIVERSAL TESTING MACHINE

17. SHEAT AND BENDING TEST (FLEXURE):
Machine used- Tensometer
UNIVERSAL TESTING MACHINE

18. TORSION TEST:
TERSION TESTING MACHINE

19. HARDNESS TEST:
Hardness- surface property
Indenters are used. Indenters may be spherical ball, cone shape, pyramid shape.
Various types of harness tests:
 Mohs test (scale range: 0 to 10)
 Brinell’s hardness test (scale range: 0 to 3000)
 Vicker’s hardness test (scale range: 0 to 3000)
 Rockwell’s hardness test (scale range: 0 to 1000)
 Knoop’s hardness test (microscopic areas)
 Shore’s hardness test (for rubber, plastic, paper etc. )
 Barcol’s, jominy’s and rebound hardness tests.

20. BRINELL HARDNESS TEST:

21. VICKERS HARDNESS TEST:

22. Impact testing:
Impact testing machine

23. Impact tests:
1. Izod test
2. Charpy test

25. Fatigue testing:

27. Thermodynamics:
Branch of science in which we study of conversion of heat in to work.
 Heat is low grade energy .
 Work is high grade energy.

28. Laws of Thermodynamics:
 Zeroth law
 First law
 Second law
 Third law

30. Steam Engine (Boilers)
 Fire tube (Lancashire Boiler)
 Water tube (Babcock and Wilcox Boiler)