286 + Mcqs in Nuclear Power Plants Page 1 McqOptions

1.	In order to eliminate knocking in compression ignition engines, there should be
A.	short delay period
B.	late auto-ignition
C.	low compression ratio
D.	high self ignition temperature of fuel
Answer» B. late auto-ignition

Discussion

2.	Uranium has isotopes
A.	U234
B.	U235
C.	U238
D.	all of these
Answer» E.

Discussion

3.	The first nuclear power plant in India was located at
A.	Kota
B.	Tarapur
C.	Bareilly
D.	none of these
Answer» C. Bareilly

Discussion

4.	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
A.	fuel pump
B.	fuel injector
C.	spark plug
D.	none of these
Answer» D. none of these

Discussion

5.	Lubrication in I.C. engines dissipates the heat generated from the moving parts due to friction.
A.	True
B.	False
C.	Can't say
D.	None of these
Answer» B. False

Discussion

6.	Materials which make good moderators do not make good reflectors.
A.	Correct
B.	Incorrect
C.	Can't say
D.	None of these
Answer» C. Can't say

Discussion

7.	A fuel of cetane number 40 has the same ignition quality as a mixture of
A.	40% cetane and 60% alpha methyl napthalene
B.	40% alpha methyl napthalene and 60% cetane
C.	40% petrol and 60% diesel
D.	40% diesel and 60% petrol
Answer» B. 40% alpha methyl napthalene and 60% cetane

Discussion

8.	For the same maximum pressure and heat input, the exhaust temperature of petrol engine is __________ than that of diesel engine.
A.	less
B.	more
C.	Can't say
D.	None of these
Answer» C. Can't say

Discussion

9.	A nuclear reactor is said to be critical when the neutron population in the reactor core is
A.	rapidly increasing leading to the point of explosion
B.	decreasing from the specified value
C.	reduced to zero
D.	constant
Answer» E.

Discussion

10.	The operation of forcing additional air under pressure into the engine cylinder is known as
A.	supercharging
B.	carburation
C.	turbulence
D.	delay period
Answer» B. carburation

Discussion

11.	As compared to air standard cycle, in actual working, the effect of variation in specific heats is to
A.	increase maximum pressure and maximum temperature
B.	reduce maximum pressure and maximum temperature
C.	increase maximum pressure and decrease maximum temperature
D.	decrease maximum pressure and increase maximum temperature
Answer» C. increase maximum pressure and decrease maximum temperature

Discussion

12.	Which of the following fuel has little tendency towards detonation ?
A.	Benzene
B.	Iso-octane
C.	Normal heptane
D.	Alcohol
Answer» C. Normal heptane

Discussion

13.	The reflectivity depends upon
A.	geometry of the reflector
B.	energy of neutrons
C.	properties of the reflector
D.	all of these
Answer» E.

Discussion

14.	The ignition of the charge by some hot surface within the engine before the passage of spark is called
A.	pre-ignition
B.	detonation
C.	ignition delay
D.	auto-ignition
Answer» B. detonation

Discussion

15.	The injection of fuel by external source is not required in case of engines working on Otto cycle.
A.	Yes
B.	No
C.	Can't say
D.	None of these
Answer» B. No

Discussion

16.	The reflectivity of a reflector is defined as the fraction of neutrons entering the reflector which are returned to the core.
A.	Agree
B.	Disagree
C.	Can't say
D.	None of these
Answer» B. Disagree

Discussion

17.	Supercharging __________ the power developed by the engine.
A.	has no effect on
B.	increases
C.	decreases
D.	None of these
Answer» C. decreases

Discussion

18.	In a four stroke cycle petrol engine, the pressure inside the engine cylinder during the suction stroke is __________ the atmospheric pressure.
A.	equal to
B.	below
C.	above
D.	None of these
Answer» C. above

Discussion

19.	If the compression ratio in I.C. engine increases, then its thermal efficiency will
A.	decrease
B.	increase
C.	remain same
D.	None of these
Answer» C. remain same

Discussion

20.	Enriched uranium is required as a fuel in a nuclear reactor, if light water is used as moderator and coolant, because light water has
A.	high neutron absorption cross-section
B.	low moderating efficiency
C.	high neutron scatter cross-section
D.	low neutron absorption cross-section
Answer» C. high neutron scatter cross-section

Discussion

21.	Which of the following statement is correct regarding the features of a Breeder reactor?
A.	It produces more fuel than it consumes.
B.	It requires highly enriched fuel.
C.	It requires liquid sodium metal as moderator.
D.	all of the above
Answer» E.

Discussion

22.	The object of providing masked inlet valve in the air passage of compression ignition engines is to
A.	enhance flow rate
B.	control air flow
C.	induce primary swirl
D.	induce secondary turbulence
Answer» D. induce secondary turbulence

Discussion

23.	A nuclear power plant differs from a conventional steam power station only in the steam generating part.
A.	Agree
B.	Disagree
C.	Can't say
D.	None of these
Answer» B. Disagree

Discussion

24.	Reflector in nuclear power plants is used to reflect neutrons back into the active core.
A.	True
B.	False
C.	Can't say
D.	None of these
Answer» B. False

Discussion

25.	The inlet valve of a four stroke cycle internal combustion engine remains open for
A.	130°
B.	180°
C.	230°
D.	270°
Answer» D. 270°

Discussion

26.	The control rods in the control system of nuclear reactors are used to
A.	absorb excess neutrons
B.	control fuel consumption
C.	control temperature
D.	all of these
Answer» B. control fuel consumption

Discussion

27.	The voltage required to produce a spark across the gap, between the sparking points is
A.	2000 to 4000 volts
B.	4000 to 6000 volts
C.	6000 to 10 000 volts
D.	10 000 to 12 000 volts
Answer» D. 10 000 to 12 000 volts

Discussion

28.	The turbine of the turbo-prop engine is __________ that of the turbo-jet engine.
A.	same as
B.	smaller than
C.	bigger than
D.	None of these
Answer» D. None of these

Discussion

29.	Number of working strokes per min. for a four stroke cycle engine are __________ the speed of the engine in r.p.m.
A.	equal to
B.	one-half
C.	twice
D.	four-times
Answer» C. twice

Discussion

30.	The scavenging efficiency of a four stroke cycle diesel engine is
A.	below 50%
B.	between 50 and 85%
C.	between 85 and 95%
D.	between 95 and 100%
Answer» E.

Discussion

31.	In petrol engines, using a fixed octane rating fuel, the increase in compression ratio will not effect the knocking tendency.
A.	Agree
B.	Disagree
C.	Can't say
D.	None of these
Answer» C. Can't say

Discussion

32.	If petrol is used in a diesel engine, then
A.	low power will be produced
B.	efficiency will be low
C.	higher knocking will occur
D.	black smoke will be produced
Answer» D. black smoke will be produced

Discussion

33.	A diesel engine has inlet valve, fuel injection valve and exhaust valve.
A.	Yes
B.	No
C.	Can't say
D.	None of these
Answer» B. No

Discussion

34.	Light weight substances can not be effective moderators.
A.	True
B.	False
C.	Can't say
D.	None of these
Answer» C. Can't say

Discussion

35.	The size of a reactor at which the chain reaction can be initiated (i.e. when system becomes critical) with just enough fissionable material (called critical mass of fuel) is known as critical size of reactor.
A.	Correct
B.	Incorrect
C.	Can't say
D.	None of these
Answer» B. Incorrect

Discussion

36.	The material most commonly used for sheilding is
A.	carbon
B.	lead
C.	concrete
D.	all of these
Answer» D. all of these

Discussion

37.	The correct mixture strength (by weight) for petrol is about
A.	14.6:1
B.	18.5:1
C.	20.4:1
D.	22.6:1
Answer» B. 18.5:1

Discussion

38.	Enriched uranium may contain fissionable contents from
A.	1 to 40%
B.	10 to 50%
C.	1 to 80%
D.	1 to 99%
Answer» E.

Discussion

39.	The pressure at the end of compression, in petrol engines, is approximately
A.	10 bar
B.	20 bar
C.	25 bar
D.	35 bar
Answer» B. 20 bar

Discussion

40.	If the speed of the engine is increased, the indicated power will
A.	increase
B.	decrease
C.	remain same
D.	None of these
Answer» B. decrease

Discussion

41.	The cetane (C16H34) which is a straight chain paraffin is assigned a cetane number of
A.	0
B.	50
C.	100
D.	120
Answer» D. 120

Discussion

42.	The running cost of a petrol engine is __________ than that of a diesel engine.
A.	higher
B.	lower
C.	Can't say
D.	None of these
Answer» B. lower

Discussion

43.	Alpha-methyl-naphthalene (C₁₁ H₁₀) has a cetane number of
A.	0
B.	50
C.	100
D.	120
Answer» B. 50

Discussion

44.	In a petrol engine, the mixture has the lowest pressure at the
A.	beginning of suction stroke
B.	end of suction stroke
C.	end of compression stroke
D.	none of these
Answer» C. end of compression stroke

Discussion

45.	A mixture containing 65% of iso-octane and 35% of normal heptane will have
A.	cetane number 65
B.	octane number 65
C.	qetane number 35
D.	octane number 35
Answer» C. qetane number 35

Discussion

46.	The knocking tendency in spark ignition engines can be decreased by adding dopes like tetra ethyle lead and ethylene dibromide.
A.	Agree
B.	Disagree
C.	Can't say
D.	None of these
Answer» B. Disagree

Discussion

47.	The loud pulsating noise heard within the cylinder of an internal combustion engine is known as
A.	detonation
B.	turbulence
C.	pre-ignition
D.	supercharging
Answer» B. turbulence

Discussion

48.	Solid fuel fabricated into various small shapes, which are assembled to form fuel elements, is in the form of
A.	plates
B.	pallets
C.	pins
D.	all of these
Answer» E.

Discussion

49.	Which of the following does not relate to a compression ignition engine?
A.	Fuel pump
B.	Fuel injector
C.	Governor
D.	Carburettor
Answer» E.

Discussion

50.	In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have
A.	low density
B.	low temperature
C.	long ignition delay
D.	all of these
Answer» E.

Discussion

Explore topic-wise MCQs in GATE (Mechanical Engineering).

In order to eliminate knocking in compression ignition engines, there should be

Uranium has isotopes

The first nuclear power plant in India was located at

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

Lubrication in I.C. engines dissipates the heat generated from the moving parts due to friction.

Materials which make good moderators do not make good reflectors.

A fuel of cetane number 40 has the same ignition quality as a mixture of

For the same maximum pressure and heat input, the exhaust temperature of petrol engine is __________ than that of diesel engine.

A nuclear reactor is said to be critical when the neutron population in the reactor core is

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

As compared to air standard cycle, in actual working, the effect of variation in specific heats is to

Which of the following fuel has little tendency towards detonation ?

The reflectivity depends upon

The ignition of the charge by some hot surface within the engine before the passage of spark is called

The injection of fuel by external source is not required in case of engines working on Otto cycle.

The reflectivity of a reflector is defined as the fraction of neutrons entering the reflector which are returned to the core.

Supercharging __________ the power developed by the engine.

In a four stroke cycle petrol engine, the pressure inside the engine cylinder during the suction stroke is __________ the atmospheric pressure.

If the compression ratio in I.C. engine increases, then its thermal efficiency will

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

Which of the following statement is correct regarding the features of a Breeder reactor?

The object of providing masked inlet valve in the air passage of compression ignition engines is to

A nuclear power plant differs from a conventional steam power station only in the steam generating part.

Reflector in nuclear power plants is used to reflect neutrons back into the active core.

The inlet valve of a four stroke cycle internal combustion engine remains open for

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

The voltage required to produce a spark across the gap, between the sparking points is

The turbine of the turbo-prop engine is __________ that of the turbo-jet engine.

Number of working strokes per min. for a four stroke cycle engine are __________ the speed of the engine in r.p.m.

The scavenging efficiency of a four stroke cycle diesel engine is

In petrol engines, using a fixed octane rating fuel, the increase in compression ratio will not effect the knocking tendency.

If petrol is used in a diesel engine, then

A diesel engine has inlet valve, fuel injection valve and exhaust valve.

Light weight substances can not be effective moderators.

The size of a reactor at which the chain reaction can be initiated (i.e. when system becomes critical) with just enough fissionable material (called critical mass of fuel) is known as critical size of reactor.

The material most commonly used for sheilding is

The correct mixture strength (by weight) for petrol is about

Enriched uranium may contain fissionable contents from

The pressure at the end of compression, in petrol engines, is approximately

If the speed of the engine is increased, the indicated power will

The cetane (C16H34) which is a straight chain paraffin is assigned a cetane number of

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

Alpha-methyl-naphthalene (C₁₁ H₁₀) has a cetane number of

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

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

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

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

Solid fuel fabricated into various small shapes, which are assembled to form fuel elements, is in the form of

Which of the following does not relate to a compression ignition engine?

In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have