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Ic Engines And Nuclear Power Plants Online Exam Quiz

Important questions about Ic Engines And Nuclear Power Plants. Ic Engines And Nuclear Power Plants MCQ questions with answers. Ic Engines And Nuclear Power Plants exam questions and answers for students and interviews.

1. A mixture containing 65% of iso-octane and 35% of normal heptane will have

Options

A : cetane number 65

B : octane number 65

C : qetane number 35

D : octane number 35

2. The increase of efficiency of a compression ignition engine, as the load decreases, is due to

Options

A : higher maximum temperature

B : qualitative governing

C : quantitative governing

D : hit and miss governing

3. The knocking tendency in spark ignition engines can be decreased by adding dopes like tetra ethyle lead and ethylene dibromide.

Options

A : Agree

B : Disagree

C :

D :

4. The function of a distributor in a coil ignition system of I.C. engines is

Options

A : to distribute spark

B : to distribute power

C : to distribute current

D : to time the spark

5. Which of the following statement is correct regarding petrol engines?

Options

A : A fine fuel spray mixed with air is ignited by the heat of compression which is at a high pressure.

B : The fuel supplied to the engine cylinder is mixed with necessary amount of air and the mixture in ignited with the help of a spark plug.

C : The fuel is first evaporated after passing through a carburettor and is mixed with air before ignition.

D : all of the above

6. The cetane (C 16 H 34 ) which is a straight chain paraffin is assigned a cetane number of

Options

A : 0

B : 50

C : 100

D : 120

7. The control rods in the control system of nuclear reactors are used to

Options

A : absorb excess neutrons

B : control fuel consumption

C : control temperature

D : all of these

8. In compression ignition engines, swirl denotes a

Options

A : haphazard motion of the gases in the chamber

B : rotary motion of the gases in the chamber

C : radial motion of the gases in the chamber

D : none of the above

9. Supercharging __________ the power developed by the engine.

Options

A : has no effect on

B : increases

C : decreases

D :

10. Which of the following statement is wrong?

Options

A : In compression ignition engines, detonation occurs near the beginning of combustion.

B : Since the fuel, in compression ignition engines, is injected at the end of compression stroke, therefore, there will be no pre-ignition.

C : To eliminate knock in compression ignition engines, we want to achieve auto-ignition not early and desire a long delay period.

D : In compression ignition engines, because of hetrogeneous mixture, the rate of pressure rise is comparatively lower.

1. The running cost of a petrol engine is __________ than that of a diesel engine.

Options

A : higher

B : lower

C :

D :

3. A higher compression ratio causes

Options

A : pre-ignition

B : increase in detonation

C : an acceleration in the rate of combustion

D : any one of these

4. The injector nozzle of a compression ignition engine is required to inject fuel at a sufficiently high pressure in order to

Options

A : inject fuel in a chamber of high pressure at the end of compression stroke

B : inject fuel at a high velocity to facilitate atomisation

C : ensure that penetration is not high

D : all of the above

5. In a two stroke engine, the working cycle is completed in two revolutions of the crankshaft.

Options

A : Correct

B : Incorrect

C :

D :

6. The mean effective pressure of a diesel engine having fixed compression ratio will __________ if cut off ratio decreases.

Options

A : increase

B : decrease

C :

D :

7. In a petrol engine, the mixture has the lowest pressure at the

Options

A : beginning of suction stroke

B : end of suction stroke

C : end of compression stroke

D : none of these

8. Which one of the following event would reduce volumetric efficiency of a vertical compression ignition engine?

Options

A : inlet valve closing after bottom dead centre

B : inlet valve closing before bottom dead centre

C : inlet valve opening before top dead centre

D : exhaust valve closing after top dead centre

9. The indicated mean effective pressure of an engine is obtained from the indicator diagram drawn with the help of an engine indicator.

Options

A : True

B : False

C :

D :

10. The correct sequence of the decreasing order of brake thermal efficiency of the three given basic types of engines is

Options

A : four stroke C.I. engine, four stroke S.I. engine, two stroke S.I. engine

B : four stroke S.I. engine, four stroke C.I. engine, two stroke S.I. engine

C : four stroke C.I. engine, two stroke S.I. engine, four stroke S.I. engine

D : two stroke S.I. engine, four stroke S.I. engine, four stroke C.I. engine

1. A fuel will detonate less if it has higher self ignition temperature.

Options

A : True

B : False

C :

D :

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