mechanical engineering MCQs – Page 70

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 Review each marked answer and report any item that may be outdated or unclear.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

1381. Activity s,lack or float of any event on a PERT/CPM chart is represented by__________________?
0

A. anyone of the above

B. latest start time of the event earliest start time of the event

C. none of the above

D. latest finish time of event earliest finish time of the event

E. latest start time of succeeding event -earliest finish time of preceding event activity time

1382. Which is false statement about advantages of V-type engine_________________?
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A. less overhead clearance

B. improved distribution of air to cylinder

C. reduced torsional vibration because of shorter crankshaft

D. compact design requiring lesser space

E. casting less liable to distortion

1383. To reduce the possibility of knock in the C.I. engines, the first elements of fuel and air should have_______________?
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A. short delay

B. high temperature

C. reactive mixture

D. high density

E. all of the above

1384. The system of lubrication used for motor cycles and scooters is by________________?
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A. forced lubrication system

B. wet sump method

C. applying grease under pressure

D. splash lubrication

E. mixing about 5% lub oil with petrol

1385. The allowed time for a job equals standard time plus___________________?
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A. process allowance

B. policy allowance

C. learning allowance

D. unforeseen allowance

E. interference allowance

1386. The basic difference between PERT and CPM is that_____________?
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A. PERT is used in workshops and CPM in plants

B. costs are considered on CPM only and not in PERT

C. PERT deals with events and CPM with activities

D. guessed times are used in PERT and evaluated times in CPM

E. critical path is determined in PERT only

1387. Detonation can be controlled by_____________________?
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A. varying compression ratio

B. reducing the r.p.m.

C. using lian mixture

D. increasing inlet pressure

E. retarding the spark timing

1388. Method of governing used in petrol engine is________________?
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A. quantity governing

B. quality governing

C. hit and miss governing

D. partial governing

E. combined governing

1389. PERT and CPM are__________________?
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A. techniques to determine project status

B. aids to the decision maker

C. decision making techniques

D. charts which increase aesthetic appearance of rooms

E. aids to determine cost implications of project

1390. The probability distribution of activity times in PERT follows following distribution__________________?
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A. exponential

B. beta

C. Gaussian

D. normal

E. binomial

1391. Malleability of a material can be defined as ______________________?
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A. ability to undergo large permanent deformations in compression

B. all of the above

C. ability to undergo large permanent deformations in tension

D. ability to recover its original form

E. none of the above

1392. In inventory control, the economic order quantity is the_________________?
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A. highest level of inventory

B. optimum lot size

C. none of the above

D. lot corresponding to break-even point

E. capability of a plant to produce

1393. Choose the wrong statement Time study is used to_________________?
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A. determine overhead expenses

B. determine standard costs

C. compare alternative methods

D. provide a basis for setting piece prices or incentive wages

E. determine the capability of an operator to handle the number of machines

1394. In order to prevent formation of carbon on the injector, the temperature of nozzle tip should be__________________?
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A. between 500 1000C

B. between 100-250C

C. between 400 500C

D. between 250 300C

E. less than 100C

1395. Carburretion is done to________________?
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A. break up and mix the petrol with air

B. heat up the charge to cylinder

C. feed petrol into cylinder

D. govern the engine

E. scavenge the cylinder

1396. In PERT analysis, critical path is obtained by joining events having___________________?
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A. #NAME?

B. dummy activities

C. #NAME?

D. zero sldck

E. critical activities

1397. The following type of carburettor is preferred_______________?
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A. none of the above

B. horizontal type

C. concentric type

D. vertical type

E. eccentric type

1398. Iso-oct ,ne________________?
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A. is an index of detonation quality

B. has octane number of 100

C. has octane number of 50

D. has octane number of 0

E. is an index of knocking quality

1399. The most popular type of organisation used for Civil Engineering Constructions is_________________?
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A. functional organisation

B. none of the above

C. effective organisation

D. line and staff organisation

E. line organisation

1400. Pick up the correct statement from the following?
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A. if the float of an activity is zero, the activity is critical and any delay in its performance will delay the whole project

B. if the float is positive and the activity is delayed by a period equal to its total float, the completion of project in not delayed

C. the float may be positive, zero or negative

D. all of the above

E. if the float of an activity is negative, delay in its performance is bound to delay the completion of project

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