1. What is engine?

2. What is IC engine?
3. What is the difference between IC engine and external engine?
4. What are the types of IC or EC engines?
5. What are the different type of Rotary IC Engine?
6. What are the different type of Reciprocating IC Engine?
7. What is the advantage of reciprocating IC engine?
8. What is the disadvantage of reciprocating IC engine?
9. Why the steam engines are slowly phased out nowadays?
10. What are the various components of IC Engine?
11. What is the material of ICE cylinder? What is the manufacturing process?
12. What is the material of ICE piston? What is the manufacturing process?
13. What is the material of connecting rod? What is the manufacturing process?
14. What is the material of ICE crank shaft? What is the manufacturing process?
15. What is the function of piston ring? What are the essential properties of piston ring?
16. How do you represent the capacity of IC engine? What is the meaning of cubic
capacity?
17. What are the cycles of operations in an ideal four stroke engine?
18. How many power strokes are there for the one complete cycle?
19. How SI engine is different from CI engine?
20. Why do we use less compression ratio in SI engine as compared to CI engine?
21. What is the difference between the two stroke and four stroke engines?
22. On what cycle does modern diesel car work upon?
23. Why car is made by four stroke engines why not two strokes engines?
24. What are the assumptions are used to convert actual cycle to air standard cycle?
25. Why Otto cycle is practically possible and Carnot cycle is impractical?
26. Why is spark ignition provided in a petrol engine?
27. Why is compression ignition provided in a diesel engine?
28. What is indicated diagram for SI and CI engine?
29. What is the length of indicated diagram?
30. What is the area of indicated diagram?
31. Define mean effective pressure and comments its application in IC engine?
32. What is indicated mean effective pressure?
33. What is brake mean effective pressure?
34. What is brake thermal efficiency and how you calculate?
35. For same compression and heat addition, which cycle is more efficient?
36. For same compression and heat rejection, which cycle is more efficient?
37. For same peak pressure, peak temperature and heat addition, which cycle is more
efficient?
38. For same maximum pressure and heat input, which cycle is more efficient?
39. Draw Ericsson cycle p-v diagram? Where it can be used?
40. What is the significance of fuel air cycles?
41. What assumptions do we need to overcome in order to convert a standard air cycle to a
fuel air cycle?
42. What is fuel air ratio?
43. What is equivalence ratio?
44. What do you mean by chemically correct fuel air ratio?
45. What is stochiometric ratio?
46. What is the comparison between air standard and fuel air cycle?
47. How does the presence of CO affect dissociation?
48. Compare the air-standard cycle and fuel-air cycles based on (i) character of the cycle
(ii) fuel-air ratio (iii) chemical composition of the fuel
49. Is the effect of compression ratio on efficiency the same in fuel-air cycles also?
50. What are pumping and rubbing friction losses.
51. What is octane number fuels?
52. Is it possible to assign an octane number to a fuel?
53. What is cetane number of fuels?
54. What is ignition delay?
55. What do you mean by knock intensity?
56. What are the major losses in actual engine?
57. Why fuel injector is used in CI engine?
58. What do you mean by (i) chemically correct mixture (ii) rich mixture and (iii) lean
mixture
59. What air fuel mixture is required at different loads and speeds?
a. Idling (mixture must be enriched)
b. Cruising (mixture must be leaned)
c. High Power (mixture must be enriched)
60. What do you mean by homogeneous combustion and where you get?
61. What do you mean by heterogeneous combustion and where you get?
62. How pressure rising in the SI engine, draw the pressure v/s crank angle diagram?
63. What are the phases in the combustion of fuel in SI engine?
64. What is knocking?
65. What is detonation?
66. How to detect detonation?
67. What you will do to control the detonation?
68. What is ignition lag and how you can obtain?
69. What will happen when diesel put in petrol engine?
70. Will detonation increase or decrease if I go to altitude with petrol engine car?
71. What will happen when petrol injects in diesel engine?
72. Why knocking takes place in CI engine?
73. In SI and CI engine, in which case engine vibration produced?
74. How you reduce knocking in CI Engine?
75. What is the difference between detonation in SI engine and knocking in CI engine?
76. What is the various mechanism of lubrication used in IC engine?
77. Why in 2 stroke engine requires lubricant with petrol?
78. What do you mean by thermosyphon cooling system in IC engine?
79. What do you mean by forced circulation cooling system in IC engine?
80. What do you mean by evaporative cooling system in IC engine?
81. What do you mean by pressure cooling system in IC engine?
82. Why fins and baffles are required in an air-cooled engine?
83. What are the causes and problems of exhaust emissions?
84. What are the emissions that come out of engine exhaust?
85. What are the methods available for finding friction power of an engine?
86. What is Morse test? Why Morse test is not suitable for single cylinder engine?
87. How to measure brake power?
88. What do you mean by firing order?
89. What is the firing order we normally used in vehicles?
90. Explain the effect of various engine variables on SI engine knock?
91. What is delay period and what are the factors that affect it?
92. What are catalytic converters? How do they help in reducing HC, CO and NOx
emissions?
93. What is EGR? and explain how it reduces the NOx emission?
94. How electric vehicles helps in reducing the pollution caused by conventional vehicles?
95. How many types of electric vehicles are there?
96. What is a battery electric vehicle?
97. What is a fuel cell electric vehicle?
98. Difference between the CNG and electric vehicles?
99. When did electric vehicles see their first decline?
100. What are the main components of electric vehicle?