mechanical engineering MCQs – Page 58

Practise multiple-choice questions from mechanical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

mechanical engineering Mcqs

1. compressors gas turbines and jet engines 2. theory of machines 3. nuclear power plants 4. engineering materials 5. strength of materials mechanical engineering 6. thermodynamics 7. heat transfer 8. i c engines 9. steam boilers engines nozzles and turbines 10. engineering mechanics 11. fluid mechanics mechanical engineering 12. production technology 13. machine design 14. hydraulic machines 15. workshop technology 16. refrigeration and air conditioning

1141. Yield point in fatigue loading as compared to static loading is__________________?
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A. same

B. depends on other factors

C. lower

D. none of the above

E. higher

1142. The actual volume of fresh charge admitted in 4-stroke petrol engine is_________________?
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A. more than stroke volume

B. equal to stroke volume

C. less than stroke volume

D. more than cylinder volume

E. equal to stroke volume and clearance volume

1143. Father of time study was_________________?
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A. H.B. Maynord

B. H.L. Gantt

C. R.M. Barnes

D. F.B. Gilberfh

E. F.W. Taylor

1144. In the perpetual inventory control, the material is checked when it reaches its________________?
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A. alarming value

B. average value

C. maximum value

D. minimum value

E. original value

1145. Flash point of fuel oil is __________________?
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A. none of the above

B. temperature at which it catches fire without external aid

C. temperature at which it solidifies or congeals

D. minimum temperature to which1 oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame

E. indicated by 90% distillation temperature, i.e. when 90% of sample oil has distilled off

1146. A bolt___________________?
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A. has a head on one end and a nut fitted to the other

B. has head at one end and other end fits into a tapped hole in the other part to be joined

C. has both the ends threaded

D. is provided with pointed threads

E. requires no nut

1147. In V-belt drive, belt touches______________?
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A. at bottom

B. at sides only

C. both at bottom and sides

D. could touch anywhere

E. none of the above

1148. In diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of____________________?
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A. 150CPC

B. 2000C

C. 500C

D. 250C

E. 1000C

1149. In the opposed piston diesel engine, the combustion chamber is located________________?
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A. any when

B. between the pistons

C. there is no such criterion

D. above the piston (/;) below the piston

1150. The shock absorbing capacity of a bolt can be increased by___________________?
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A. increasing shank diameter

B. making shank diameter equal to core diameter of thread

C. grinding the shank

D. tightening it properly

E. using washer

1151. One time measurement unit (TMU) in method time measurement system equals______________?
0

A. 0.006 minute

B. 0.0006 minute

C. 0.001 minute

D. 0.06 minute

E. 0.0001 minute

1152. The size of inlet valve of.an engine in comparison to exhaust valve is_________________?
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A. more

B. more/less depending on capacity of engine

C. same

D. less

E. varies from design to design

1153. The pitch of threads on a Jock nut in comparison to pitch of nut is_________________?
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A. very fine

B. coarser

C. very coarse

D. same

E. finer

1154. The calorific value of gaseous fuels is expressed in terms of__________________?
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A. kcal/kg

B. kcal

C. all of the above

D. kcal/m2

E. kcal/m

1155. If d is the diameter of bolt hole then for a flanged pipe joint to be leak proof, the circumferential pitch of the bolts should be_________________?
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A. 20Vdto30Vd

B. 30V5?to40Vd

C. lOVZ

D. 15Vdto20VZ

E. 10VZtol5Vd

1156. If d is the normal diameter of a bolt in mm, then the initial tension in kg in a bolt used for making a fluid tight joint as for steam engine cover joint is calculated by the relation_______________?
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A. 124 d

B. 168 d

C. 151 d

D. 102 d

E. 138 d

1157. Polymerisation is a chemical process in which molecules of a compound become________________?
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A. gaseous

B. larger

C. slowed down

D. liquid

E. smaller

1158. Which of the following layouts is suited to job production__________________?
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A. product layout

B. process layout

C. fixed position layout

D. plant layout

E. functional layout

1159. Spring index is___________________?
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A. its capability of storing energy

B. ratio of coil diameter to wire diameter

C. nothing

D. indication of quality of spring

E. load required to produce unit deflection

1160. In a typical medium speed 4-stroke cycle diesel engine the inlet valve_____________________?
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A. remains open for 200.

B. opens at top dead center and closes at bottom dead center

C. opens at 10 after top dead center and closes 20 before the bottom dead center

D. may open or close anywhere

E. opens at 20 before top dead center and closes at 35 after the bottom dead center

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