list of interview questions asked for mechanical engineer

8/10/2019 List of interview Questions Asked for mechanical engineer

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LIST OF DIFFERENT QUESTIONS ASKED DURING Interview:-

1. iron carbide diagram

stress strain curve

isometric view of some examples

Questions on gears

forces acting on shafts

2. Draw PV diagram of Diesel cycle both theoretical as well as actual cycle.

3. The Diesel cycle is commonly referred to as constant pressure cycle. At which

point of Diesel cycle the pressure remains constant?

4. A shaft has a diameter of 30mm and the torque applied in the shaft is 30 N-

m.what would be the maximum shear stress that the shaft can withstand?

5. What is the purpose of shaft?

6. Types of gears and purpose of gears.

7. Types of bearings and purpose of bearings.

8. How the power is being transmitted from engine to wheel.9. What is meant by power train and what are all the components included in

it?

10. What are the major systems that are necessary to run an automobile?

11. Draw the layout and power flow in constant mesh gear box.

12. Define Hooks law.

13. Draw stress strain diagram of cast iron and show the point of failure of cast

iron.

14. Is there any relationship between the stress strain diagram and Hooks law? If

yes explain it.

15. Define Poissons ratio.

16. What is the Poissons ratio for steel and rubber?

17. If you are buying a car what are all the features and performance parameters

that you will check before buying it.

18. How the valve tappet was manufactured?

19. What is the material used for manufacturing the valve tappet?

20. What is the purpose of turbocharger?

21. Explain the working principle of EGR and what is the need for it?

22. What are the major difference between common rail systems and GDI

systems?

23. Define volumetric efficiency.

24. Who are the major suppliers of fuel injection systems in India?

25. The casing of turbocharger was made of which material?

26. By which manufacturing method, the crank shaft was produced?

27. A small shaft or a rod was generally seen connecting the casings of turbine

and compressor of a turbocharger. What is the purpose of that rod?


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28. What are the various forces acting on the crank shaft?

29. Why under squared engine designs are preferred than the over squared

engine designs?

30. When a vehicle is called hybrid?

31. Types of hybrid vehicle configurations.

32. What are the new technologies by which the car body was manufactured?

33. What will be the future of I.C.Engines?

34. What are all the major alternative fuels that are currently used in Indian

vehicles?

35. What is fuel cell?

36. 1.tell abt u r self& my area of interest

37. 2.what are the pollutants in si and ci engines

38. 3.what are the after treatment devices in si and ci engines

39. 4.whatis doc ,3 way catalyst and dpf

40. 5.how to control nox in ci engine41. 6.how to control emissions in 2 wheeler

42. 7.draw the stages of combustion and explain

43. 8.what happened if delay periode is more in ci engine

44. 9.how to predict the knocking in ci engine

45. 10.how to increase the vol efficiency

46. 11.what changes to be done to increase the power of engine from 20kw to

25kw

47. 12.draw the diesel cycle

48. 13.draw the valve timing diagram for 4 stroke diesel cycle

49. 14.what is meant by valve overlap

50. 15.why we are not using scr when it comes into vehicle

51. 16.what is meant by pumping loss

52. 1.tell abt ur self &hobbies

53. 2.what are the subjects u studied in mtech

54. 3.what is d difference between si and ci engine combustion

55. 4.draw the stages of combustion and explain

56. 5.how to find the temp at different points in diesel cycle

57. 6.what is d comp ratio for diesel and otto

58. 7which stroke is more compression or expansion59. 8.what changes to be done in cooling medium if combustion temp increases

60. 9.what are the techniques to reduce heat loss to the cylinder walls.

61. 10.draw the valve timing diagram

62. 11.types of scavengings

63. Tell some engine components

64. Draw otto cycle.


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65. Distinguish SI Engine and CI Engine.

66. What is the effect of Turbocharger?

67. What is the function of Gear Box?

68. What are the types of Gears?

69. Give an example of a Component where Bevel Gears are used.

70. What is yield point/stress?

71. Which material is used in valve tappet?

72. What is yield point & poisson ratio value of valve tappet material used?

73. what is poisson ratio?

74. Which Materials are used for Engine Block?

75. Define Hooks law

76. Draw Stress Strain Diagram

77. Show me the point in Stress Strain diagram where after the Material Breaks

or fails?

78. Do you have any questions for me?79. Questions related domain of working.

80. Whats your Father doing?

81. .Can you work in Chasy or Gear Box Domain?

82. .Do you have any questions for me?

83. Why do you choose Automobile in BE & ICE in M.Tech?

84. Tell me about Injection systems

85. What is MPFI?

86. How can Electronic System better than a mechanical system? & State an

example.

87. Effect Of DI & IDI in Diesel Engines.

88. What is Turbocharger and its Effect.

89. What is EGR And its Effect.

90. How Emissions Are Controlled?

91. What is an SCR?

92. What is an injector?

93. Advances in Injectors.

94. What is Micro-Controller?

95. What are the types of Micro controller?

96. What is HIL?97. Do you know C-Language?

98. What are the Modelling softwares that you Know?

99. What is the Chemically Correct Air-Fuel Ratio?

100. What is Lean mixture & Rich Mixture?

101. What is the Lambda value of lean mixture?

102. Is it possible that an engine can operated on stochiometric ratio.


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103. Questions regarding area of working / Domain.

104. HOW TO DESIGN PISTON,PISTON RING,INLET PORT?

105. WHAT IS TUMBLE,SQUISH AND SWIRL? AND WHERE IT IS PRESENT

(MEANS IN CI OR SI) AND WHERE THEY ARE MAX AND MIN(MEANS AT TDC OR

BDC)

106. MATERIALS USED FOR VARIOUS ENGINE COMPONENTS LIKE PISTON AND

RECENT MATERIALS CHANGES FOR PISTONFUTURE TRENDS OF PISTON DESIGN

107. WHST IS PISTON BOWL AND ITS DESIGN CONSIDERATIONS

108. EMMISIONS??IN C.I AND IN S,I??

109. CONTAINS IN PM AND SMOKE

110. DIFFERENCE IN SMOKE AND FOG

111. CONTROL STARGIES TO REDUCE EMMISIONS

112. LATEST TRENDS TO REDUCE DIFFERENT EMMSIONS..TECHNIQUES AND

ALL THAT

113. HEAT TRANFER??MODE??CONDUCTION CONVECTION RADIATION??THERIR FORMULAE AND MANY QUESTIONS ON THAT

114. HEAT TRANSFER PROBLEMS LIKE THREE SLABS ARE THERE AND IN WHAT

WAY WILL HEAT WILL TRANSDER

115. EMMSIONS??

116. EGR SCR

117. PM NOX CURVES TRADE OFF AND SIGNIFICANCE

118. DIFFERENCE EMMSION SON DIDDERENT ENFINES

119. MANY BASIC CUREVES DIA LIKE TORQUE POWER BSFC INDIAN DRIVING

CYCLE

120. HOW TO DESIGN ENGINE,PISTON,CONNECTING ROD,CRANKSHAFT

121. DIFFERENT IN SI AND CI PISTONS

122. WHICH COATING IS USED ON PISTONS THEIR ADVANTADE

123. VALVE TIM ING DIA?WHAT HAPPENS WHEN IN REDUCE OR ADVANCE THE

TIMINGWHICH TIMING PREFER BY SPORTS CAR

124. DIFFERENT MATERIALS AND MANUFACTURING PROCESS FOR ENGINE

MATERIALS

125. COMBUSTION OF SI AND CI??THEIR DIFFERENCES

126. MATERIALS PROPERTY

127. Basic about combustion?128. Basic difference between SI & CI combustion?

129. What are the thermodynamics laws?

130. What is enthalpy and entropy? Explain with example

131. Why entropy is increases with temperature?

132. Current projects any taken?

133. What are your hobbies with example?


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134. Draw Joule-Brayton Cycle?

135. Explain Otto cycle? Draw and explain process?

136. What is pumping loss? And how it is determined?

137. Can we use diesel in two wheeler? Explain with reason?

138. What are requirements of vehicle during downhill travel?

139. What are the critical components of Engine? Explain?

140. What are skills required for company growth?

141. Draw iron-carbide diag. & explain?

142. Draw stress-strain Diag. & explain?

143. Which type material used in Automobile & why?

144. Why Cast iron mostly used for making Cylinder block?

145. What is viscosity & explain

146. What is Reynolds no. & explain its significance.

147. What is VVT & explain in detail.

148. Why VVT is used & give examples.149. What is HCCI?

150. About your family background.

151. What is famous about your hometown?

152. Tell me about FDI.

153. Some Q about Chennai.

154. About your M.Tech college.

155. What is HCCI?

156. Why HCCI?

157. Why Turbochargers used in Automobile, explain in detail?

158. What is compressibility?

159. What is Mach no. Explain its significance?

160. Explain governing equation in Fluid Mechanics?

161. Small problem on Conduction & Convection H.T.

162. why you joined engineering?

163. what was your project?

164. which papers you have presented till now?

165. Why do you like to Manage the events?

166. how to design a engine from scratch?

167. how will you increase the efficiency of engine?168. even if we increase the efficiency of engine by 30% we are getting overall

efficiency of vehicle 5% ,why so?

169. Design the connecting rod

170. what is soot and PM

171. what happened is we fill diesel into petrol engine and vice versa

172. Design the engine by asking some relevant question

list of interview questions asked for mechanical engineer

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