Ic Engine And Nuclear Power Plant Most Imp Mcq

Ic Engine And Nuclear Power Plant Most Imp Mcq Part-1

01. The spark ignition engines are governed by 

Ans.quantitative governing

02. If petrol is used in a diesel engine, then 

Ans. higher knocking will occur 

03. Enriched uranium is required as a fuel in a nuclear reactor, if light water is used as moderator and coolant, because light water has

Ans. low moderating efficiency 

04. The compression ignition engines can work on 

Ans. very lean mixture of fuel.

05. The ignition quality of petrol is expressed by 

Ans. octane number

06. Diesel as compared to petrol is 

Ans. more difficult to ignite

07. The first nuclear power plant in India was located at 

Ans. Tarapur (Maharashtra)

08. A diesel engine, during suction stroke, draws

Ans. air only

09. Anti-knock for compression ignition engines is 

Ans. amyl nitrate 

10. In an internal combustion engine, the process of removing the burnt gases from the combustion chamber of the engine cylinder is known as

Ans. scavenging

11. The method of determination of indicated power of a multi cylinder spark ignition engine is by the use of

Ans. Morse test

12. In a four stroke cycle petrol engine, , the compression

Ans. starts at 40° after bottom dead centre and ends at 30° before top dead centre

13. Reflector in nuclear power plants is used to

Ans.  reflect neutrons back into the active core.

14. Stoichiometric ratio is 

Ans. chemically correct air-fuel ratio by volume

15. Which of the following fuel has little tendency towards detonation ? 

Ans. Iso-octane 

16. In a petrol engine, the fuel supplied to the engine cylinder is mixed with required quantity of air and the mixture is ignited with a

Ans. spark plug

17. Iso-octane (C8H18) has octane number of 

Ans. 100

18. The operation of forcing additional air under pressure into the engine cylinder is known as

Ans. supercharging

19. In diesel engines, the ignition takes place due to the heat produced in the engine cylinder

Ans. at the end of compression.

20. The ratio of the work obtained at the crankshaft in a given time to the energy supplied during the same time is called

B.overall efficiency

21. Plutonium (Pu239) is produced 

C.when U238 is irradiated by neutrons 

22. A petrol engine has compression ratio from

A.6 to 10

23. The octane number of petrol, generally available, is 

D.80 to 100

24. The brake power is the power available 

B.at the crank shaft 

25. The slowing down of fast neutrons is desirable because

A. slow moving neutrons are more effective than fast neutrons in triggering fission.

26. The normal heptane (C7H16) is given a rating of __________ octane number.

A.0

27. A diesel engine has

A. inlet valve, fuel injection valve and exhaust valve.

28. In a four stroke cycle diesel engine, the compression

A.starts at 40° after bottom dead centre and ends at 10° before top dead centre .

29. In a four stroke cycle diesel engine, the inlet valve

A.opens at 20° before top dead center and closes at 40° after bottom dead center.

30. The loud pulsating noise heard within the cylinder of an internal combustion engine is known as

A. detonation.

31. The air-fuel ratio of the petrol engine is controlled by

A.carburettor.

32. The volumetric efficiency ofa well designed engine may be 

A .75 to 90% 

33. A long delay period in compression ignition engines gives a more rapid rise in pressure which

A. causes knocking.

34. A power plant giving least running cost of production of electrical power is 

A .nuclear power plant.

35. The firing order in an I.C. engine depends upon

A.arrangement of the cylinders 
B.design of crankshaft

C.number of cylinders

D.all of these.

36. The cetane number of diesel oil, generally available, is 

A .40 to 55

37. The power actually developed by the engine cylinder of an I.C. engine is known as 

A .indicated power .

38. High speed compression engines operate on 

A .Dual-combustion cycle.

39. The nuclear power station at Tarapur (Maharashtra) has the reactor of the __________ type. 

A .boiling water.

40. The ratio of the volume of charge admitted at N.T.P. to the swept volume of the piston is called 

A .volumetric efficiency.

41. A moderator generally used in nuclear power plants is 

A .graphite and concrete .

42. The predominent isotope of the naturally occuring element is 

A .U238.

43. In a four stroke cycle petrol engine, the charge is ignited at

A.30° before top dead centre .

44. Where reactor operation is designed with fast neutrons such as in reactors using highly enriched fuel, the moderator used is

D.no moderator is needed. 

45. In a diesel engine, the duration between the time of injection and ignition, is known as 

A .delay period.

46. The detonating tendency in petrol engines increases with increase of

A. compression ratio.

47. Reactors for propulsion applications are designed for 

A .enriched uranium.

48. The primary fuel used in nuclear power plants is

A.U235 .

49. The detonation is also called

A. knocking or pinking.

50. The scavenging efficiency of a four stroke cycle diesel engine is 

A .between 95 and 100%.

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