mechanical engineering MCQs – Page 77

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 Review each marked answer and report any item that may be outdated or unclear.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

1521. Deposition of carbon in petrol engine cylinder would result in increase of__________________?
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A. swept volume

B. clearance volume

C. volumetric efficiency

D. compression ratio

E. mean effective pressure

1522. The time required to complete a task is established and a bonus is paid to the worker for every hour he saves from the established time required. This type of incentive plan is known as_________________?
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A. Halsey Premium plan

B. Bedaux Plan

C. Rowan Plan

D. Taylor Differential Piece rate system

E. Day work plan

1523. Which of the following organisation is preferred in automobile industry________________?
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A. scalar organisation

B. staff organisation

C. line and staff organisations

D. line organisation

E. functional organisation

1524. Auto-ignition reaction time for petrol engine first decreases with increase in fuel air ratio, reaches a minimum value and then increases with subsequent increase in fuel air ratio. The minimum value occurs in the region of________________?
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A. Lean mixture

B. Unpredictable

C. Chemically correct fuel air ratio

D. Rich mixture

1525. Air injection in I.C. engines refers to injection of___________________?
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A. does not exist

B. supercharging

C. liquid fuel and air

D. air only

E. liquid fuel only

1526. Solid injection in I.C. engines refers to injection of________________?
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A. liquid fuel and air

B. does not exist

C. solid fuel

D. liquid fuel only

E. solid fuel and air

1527. The linear programming techniques can be applied successfully to industries like_________________?
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A. banking

B. all of the above

C. food processing

D. oil and chemical

E. iron and steel

1528. Scheduling gives information about____________________?
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A. when work should start and how much work should be completed during a certain period

B. when work should complete

C. proper utilisation of machines

D. none of the above

E. that how idle time can be minimized

1529. Theoretically, the following engine should have maximum efficiency________________?
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A. steam engine

B. gas engine

C. 4-stroke S.I. engine

D. 4-stroke C.I. engine

E. 2-stroke S.I. engine

1530. Gnatt chart provides information about the________________?
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A. all of the above

B. proper utilisation of manpower

C. production schedule

D. efficient working of machine

E. material handling

1531. With increase in engine speed, the ignition of spark in petrol engine has to be __________________?
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A. Decreased

B. Advanced

C. Increased

D. Unaltered

1532. The reasons which are basically responsible for the formation of a queue should be that ___________________?
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A. output rate is linearly proportional to input

B. the average service rate Hess than the average arrival rate

C. none of the above

D. all of the above

E. output rate is constant and the input varies in a random manner

1533. A big advantage of PERT over Gantt charts is that in the former case_________________?
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A. activities and events are clearly shown

B. early start and late finish of an activity are clearly marked

C. activity times are clear

D. critical path can be easily determined

E. inter-relationship among activities is clearly shown

1534. Break-even analysis can be used for__________________?
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A. short run analysis

B. there is no such criterion

C. average of above two run analysis

D. long run analysis

E. none of the above

1535. In petrol engine, increase of cooling water temperature will_________________?
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A. unpredictable

B. not affect the knocking tendency

C. decrease the knocking tendecny

D. increase the knocking tendency

E. increase or decrease knocking tendency depedning on strength and time of spark

1536. The critical activity has____________________?
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A. zero float,

B. maximum float

C. average float

D. none of these

E. minimum float

1537. In the case of compression ignition engine, the %age of CO in exhaust gases is________________?
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A. Depends on load

B. 5-10%

C. Zero

D. Considerable percent

1538. The critical path of a network represents_______________________?
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A. maximum cost required for completion of project

B. the maximum time required for completion of project

C. none of the above

D. minimum cost required for completion of project

E. the minimum time required for completion of project

1539. In order to prevent knock in the S.I. engines, the charge away from the spark plug should have___________________?
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A. low temperature

B. all of the above

C. rich mixture

D. long ignition delay

E. low density

1540. Replacement studies are made on the fol-lowing basis_________________?
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A. total life average method

B. rate of return method

C. annual cost method

D. present worth method

E. any one of the above

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