mechanical engineering MCQs – Page 59

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 Review each marked answer and report any item that may be outdated or unclear.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

1161. Standard time as compared to normal time is_______________?
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A. equal

B. there is no such correlation

C. smaller

D. greater

E. none of the above

1162. The term value in value engineering refers to_______________?
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A. utility of the product

B. selling price of the product

C. manufactured cost of the product

D. depreciation value

E. total cost of the product

1163. If a spring is cut down into two springs, the stiffness of cut springs will be _________________?
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A. unpredictable

B. half

C. none of the above

D. double

E. same

1164. Material handling in automobile industry is done by_________________?
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A. trolley

B. overhead crane

C. belt conveyor

D. none of the above

E. all of the above

1165. The temperature of interior surface of cylinder wall in normal operation is not allowed to exceed____________________?
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A. 240C

B. 120C

C. 320C

D. 180C

E. 80C

1166. Antifriction bearings are__________________?
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A. hydrodynamic bearings

B. none of the above

C. thin lubricated bearings

D. sleeve bearings

E. ball and roller bearings

1167. An alien bolt is___________________?
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A. provided with countersunk head

B. self locking bolt

C. provided with hexagonal depression in head

D. same as stud

E. used in high speed components

1168. The ratio of indicated thermal efficiency to the corresponding air standard cycle efficiency is called__________________?
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A. cycle efficiency

B. net efficiency

C. relative efficiency

D. efficiency ratio

E. overall efficiency

1169. The edges of the plates for cylindrical vessels are usually bevelled to an angle of 80 for_________________?
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A. safety

B. ease of manufacture

C. fullering and caulking

D. reducing stress concentration

E. all of the above

1170. Excess quantities of sulphur in diesel fuel are Objectionable because it may cause the following______________?
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A. ch of the following is false statement?

1171. Which of the following is a permanent fastening ?
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A. keys

B. bolts

C. screws

D. rivets

E. cotters

1172. Allen bolts are___________________?
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A. designed for shock load

B. uniform strength bolts

C. used in aircraft application

D. provided with hexagonal depression in head

E. self locking bolts

1173. I.S. specifies following total number of grades of tolerances__________________?
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A. 22

B. 16

C. 18

D. 14

E. 20

1174. A tapered key which fits in a keyway in the hub and is flat on the shaft, is known as___________________?
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A. hollow saddle key

B. wood-ruff key

C. gib head key

D. flat saddle key

E. feather key

1175. Air fuel ratio at which a petrol engine can not work is_________________?
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A. 8:01

B. 10:01

C. 15:01

D. will work at all ratios

E. 20 : 1 and less

1176. The crest diameter of a screw thread is same as _____________________?
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A. core diameter

B. none of the above

C. pitch diameter

D. major diameter

E. minor diameter

1177. The salient feature of functional organisation is________________?
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A. work is properly planned and distributed

B. all of the above

C. separation of planning and design part

D. strict adherence to specification

E. each individual maintains functional efficiency

1178. Gaseous-fuel guarantees are based on___________________?
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A. all of the above

B. high heat value of oil

C. mean heat value of oil

D. calorific value of oil

E. low heat value of oil

1179. For maximum power generation, the air fuel ratio for a petrol engine for vehicles, is of the order of _________________?
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A. 9:01

B. 12 : 1

C. 18:01

D. 20:01

E. 15:01

1180. Job evaluation is the method-of determining the________________?
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A. effectiveness of various alternatives

B. contribution of a worker

C. contribution of a job

D. skills required by a worker

E. relative worth of jobs

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