mechanical engineering MCQs – Page 73

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 Review each marked answer and report any item that may be outdated or unclear.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

1441. Carbon residue in diesel oil should not be more than___________________?
0

A. 0.001%

B. 0.01%

C. 0.50%

D. 0.10%

E. 1%

1442. Petrol is distilled at a temperature in range of__________________?
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A. 220-350C

B. 65 220C

C. 350-450C

D. 450-550C

E. 30 65C

1443. The cooling water requirement for diesel engine is of the order of________________?
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A. 20-30 liters per minute per h.p

B. 0.2 to 1.0 liter per minute per h.p.

C. 10 to 20 liters per minute per h.p.

D. 5 to 10 liters per minute per h.p

E. 1 to 3 liters per minute per h.p.

1444. A CPM family includes____________________?
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A. all of the above

B. CPS (Critical Path Scheduling)

C. MCE (Minimum Cost Expenditure)

D. CPP (Critical Path Plotted)

E. CPA (Critical Path Analysis)

1445. In a diesel engine, injection pressure developed by injector is of the order of______________?
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A. 10 kg/cm2

B. 100 kg/cm2

C. 500 kg/cm2

D. 1400 kg/cm2

1446. In carburettors, the top of the fuel jet with reference to the level in the float chamber is kept at_________________?
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A. varies from situation to situation

B. may be anywhere

C. slightly lower level

D. same level

E. slightly higher level

1447. Work sampling observations are taken on the basis of_______________?
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A. past experience

B. detailed calculations

C. table of random numbers

D. fixed percentage of daily production

E. convenience

1448. The ash content in diesel oil should bot be more than_______________?
0

A. 5%

B. 0.01%

C. 0.10%

D. 0.001%

E. 1%

1449. Pick up the correct statement. Dummy activity on a PERT/CPM chart means, it_________________?
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A. consumes time, but no resources

B. consumes resources but no time

C. consumes neither time nor resources

D. is a dangling event

E. consumes both resources and time

1450. A low unit cost can be obtained by following____________________?
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A. minimum travel time plan and compact layout

B. specialisation of operation

C. product layout

D. automatic material handling equipment

E. functional layout

1451. Queuing theory is used for____________________?
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A. inventory problems

B. traffic congestion studies

C. all of the above

D. none of the above

E. job-shop scheduling

1452. Method of governing used in diesel engine is__________________?
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A. quality governing

B. combined governing

C. partial governing

D. nit and miss governing

E. quantity governing

1453. In open combustion chamber in diesel engines____________________?
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A. only a part of air charge is contained in an auxiliary chamber in which the fuel starts to burn with insufficient air which due to explosion tendency mixes thoroughly into main cylinder charge

B. there are no valves.

C. fuel is injected at atmospheric pressure

D. the shape and layout of the piston crown, the inlet port, and the valve produce the turbulent effect on fuel mixture

E. fuel is injected into an auxiliary chamber that is separated from the cylinder by an orifice or throat

1454. Gnatt charts provide information about_____________?
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A. value analysis

B. determining selling price

C. break even point analysis

D. material handling layout

E. production schedule

1455. All the four operations in two stroke engine are performed in following number of revolutions of crank shaft______________________?
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A. Half