*/*_In nuclear fission?

The electrons of the element change

The original elements change into completely different elements

The electrons of the element change

The molecules rearrange themselves to form other molecules

*/*_A nuclear reactor is said to be critical when the neutron population in the reactor core is?

Rapidly increasing leading to the point of explosion

Decreasing from the specified value

*/*_Fast breeder reactor uses?

Double circuit system of coolant cycle

*/*_The efficiency of a nuclear power plant in comparison to a conventional thermal power plant is?

May be less or mote depending on size

*/*_Amongst the following, the fissionable materials are?

U‚Äö√á√á‚Äö√á√â‚Äö√á√Ö and Pu‚Äö√á√á‚Äö√á√â‚Äö√á√â

U‚Äö√á√á‚Äö√á√â‚Äö√á√â and Pu‚Äö√á√á‚Äö√á√á‚Äö√á√¢

U‚Äö√á√á‚Äö√á√â‚Äö√á√Ö and Pu‚Äö√á√á‚Äö√á√â‚Äö√á√â

U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ and Pu‚Äö√á√á‚Äö√á√â‚Äö√á√ñ

U‚Äö√á√á‚Äö√á√â‚Äö√á√ and Pu‚Äö√á√á‚Äö√á√â‚Äö√á√¢

%_Fast breeder reactor uses_%

Double circuit system of coolant cycle

%_In nuclear fission_%

The electrons of the element change

The original elements change into completely different elements

The electrons of the element change

The molecules rearrange themselves to form other molecules

%_Natural uranium is made up of_%

99.282% U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ, 0.712% U‚Äö√á√á‚Äö√á√â‚Äö√á√ , 0.06%' U‚Äö√á√á‚Äö√á√â‚Äö√á√ë

99.282% U‚Äö√á√á‚Äö√á√â‚Äö√á√ , 0.712% U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ, 0.006% U‚Äö√á√á‚Äö√á√â‚Äö√á√ë

99.282% U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ, 0.712% U‚Äö√á√á‚Äö√á√â‚Äö√á√ , 0.06%' U‚Äö√á√á‚Äö√á√â‚Äö√á√ë

99.282% U‚Äö√á√á‚Äö√á√â‚Äö√á√ë, 0.712% U‚Äö√á√á‚Äö√á√â‚Äö√á√ , 0.006% U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ

99.282% U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ, 0.712% U‚Äö√á√á‚Äö√á√â‚Äö√á√ë, 0.006% U‚Äö√á√á‚Äö√á√â‚Äö√á√

%_The size of the reactor is said to be critical when_%

Chain reaction can be initiated

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

Rapidly increasing leading to the point of explosion

Decreasing from the specified value

_ The efficiency of a nuclear power plant in comparison to a conventional thermal power plant is$?

May be less or mote depending on size

_ Amongst the following, the fissionable materials are$?

U‚Äö√á√á‚Äö√á√â‚Äö√á√Ö and Pu‚Äö√á√á‚Äö√á√â‚Äö√á√â

U‚Äö√á√á‚Äö√á√â‚Äö√á√â and Pu‚Äö√á√á‚Äö√á√á‚Äö√á√¢

U‚Äö√á√á‚Äö√á√â‚Äö√á√Ö and Pu‚Äö√á√á‚Äö√á√â‚Äö√á√â

U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ and Pu‚Äö√á√á‚Äö√á√â‚Äö√á√ñ

U‚Äö√á√á‚Äö√á√â‚Äö√á√ and Pu‚Äö√á√á‚Äö√á√â‚Äö√á√¢

_ A fission chain reaction in uranium can be developed$?

By increasing the contents of U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ

By slowing down fast neutrons so that U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ fission continues by slow neutron

__Boiling water reactor employs__

Double circuit system of coolant cycle

__Reflector in nuclear plants is used to__

Shield the radioactivity completely

Return the neutrons back into the core

Shield the radioactivity completely

__Plutonium is produced__

By neutron irradiation of thorium

__Plutonium (Pu‚Äö√á√á‚Äö√á√â‚Äö√á√¢) is produced__

By fission of Th‚Äö√á√á‚Äö√á√â‚Äö√á√á

When U‚Äö√á√á‚Äö√á√â‚Äö√á√ is irradiated by neutrons

__In the breeder reactors the generation of new fissionable atom is__

At an equal rate of the consumption

At the lower rate than the consumption

At a higher rate than the consumption

At an equal rate of the consumption

Depends on other considerations

__In natural uranium, the constituents of three naturally occurring isotopes are__

U‚Äö√á√á‚Äö√á√â‚Äö√á√ë = 0.712%, U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ = 0.006% and U‚Äö√á√á‚Äö√á√â‚Äö√á√ = 99.282%

U‚Äö√á√á‚Äö√á√â‚Äö√á√ë = 0.006%, U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ = 0.712% and U‚Äö√á√á‚Äö√á√â‚Äö√á√ = 99.282%

U‚Äö√á√á‚Äö√á√â‚Äö√á√ë = 0.712%, U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ = 0.006% and U‚Äö√á√á‚Äö√á√â‚Äö√á√ = 99.282%

U‚Äö√á√á‚Äö√á√â‚Äö√á√ë = 99.282%, U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ = 0.006% and U‚Äö√á√á‚Äö√á√â‚Äö√á√ = 0.712%

U‚Äö√á√á‚Äö√á√â‚Äö√á√ë = 0.006%, U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ = 99.282% and U‚Äö√á√á‚Äö√á√â‚Äö√á√ = 0.712%

_U235 will undergo fission by$?

High energy (fast) neutrons alone

Low energy (slow) neutrons alone

_A fast breeder reactor uses following as fuel$?

U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ

_A fast breeder reactor uses$?

U‚Äö√á√á‚Äö√á√â‚Äö√á√

90% U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ

U‚Äö√á√á‚Äö√á√â‚Äö√á√

U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ

Pu‚Äö√á√á‚Äö√á√â‚Äö√á√¢

_Pressurized water reactor is designed$?

For boiling pi water in the core

To use liquid sodium metal as coolant

To prevent the water coolant from boiling in the core

_Which of the following are ferrite materials?$?

U‚Äö√á√á‚Äö√á√â‚Äö√á√ and Pu‚Äö√á√á‚Äö√á√â‚Äö√á√¢

U‚Äö√á√á‚Äö√á√â‚Äö√á√â and Pu‚Äö√á√á‚Äö√á√â‚Äö√á√¢

U‚Äö√á√á‚Äö√á√â‚Äö√á√ and Pu‚Äö√á√á‚Äö√á√â‚Äö√á√¢

U‚Äö√á√á‚Äö√á√â‚Äö√á√ and Th‚Äö√á√á‚Äö√á√â‚Äö√á√¢

The secondary fuel used in nuclear power plants is$?

U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ and Th‚Äö√á√á‚Äö√á√â‚Äö√á√á

U‚Äö√á√á‚Äö√á√â‚Äö√á√â and Pu‚Äö√á√á‚Äö√á√â‚Äö√á√¢

U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ and Th‚Äö√á√á‚Äö√á√â‚Äö√á√á

U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ and Pu‚Äö√á√á‚Äö√á√â‚Äö√á√

U‚Äö√á√á‚Äö√á√â‚Äö√á√â and Pu‚Äö√á√á‚Äö√á√â‚Äö√á√

Moderator in nuclear plants is used to$?

Extract heat from nuclear reaction

Cause collision with the fast moving neutrons to reduce their speed

Plutonium (Pu239) is produced$?

When U238 is irradiated by neutrons

150 + Mcqs in Power Plant Engineering in Mechanical Engineering Page 2 McqOptions

51.	/_In nuclear fission?
A.	The original elements change into completely different elements
B.	The electrons of the element change
C.	The molecules rearrange themselves to form other molecules
D.	None of the above
Answer» B. The electrons of the element change

52.	/_A moderator, apart from its high neutron slowing power, and low non-productive neutron, should be?
A.	Stable under nuclear radiation
B.	Corrosion resistant
C.	Good thermal conductor
D.	All of these
Answer» E.

54.	/_Fast breeder reactor uses?
A.	Boiler
B.	Direct cycle of coolant system
C.	Double circuit system of coolant cycle
D.	Multi passes system
Answer» D. Multi passes system

55.	/_The unit of radioactivity is?
A.	Electron volt
B.	Electron ampere
C.	Curie
D.	MV
Answer» D. MV

56.	/_The efficiency of a nuclear power plant in comparison to a conventional thermal power plant is?
A.	Same
B.	More
C.	Less
D.	May be less or mote depending on size
Answer» D. May be less or mote depending on size

61.	%_Which is not identical for an atom and an isotope?_%
A.	Mass number
B.	Atomic number
C.	Chemical properties
D.	Position in periodic table
Answer» B. Atomic number

62.	%_Superheated steam is generated in following reactor_%
A.	Boiling water
B.	Gas cooled
C.	Pressurised water
D.	All of the above
Answer» C. Pressurised water

63.	%_Breeder reactor has a conversion ratio of_%
A.	Unity
B.	More than unity
C.	Less than unity
D.	Zero
Answer» C. Less than unity

64.	%_The size of the reactor is said to be critical when_%
A.	Chain reaction can be initiated
B.	It becomes uncontrollable
C.	It explodes
D.	It produces no power
Answer» B. It becomes uncontrollable

68.	_ The material most commonly used for shielding is$?
A.	Carbon
B.	Lead
C.	Concrete
D.	All of these
Answer» D. All of these

69.	_ The unit of radioactivity is$?
A.	Electron volt
B.	Electron ampere
C.	Curie
D.	MV
Answer» D. MV

79.	_The total energy released in fission of U is$?
A.	5 MeV
B.	10 MeV
C.	199 MeV
D.	168 MeV
Answer» D. 168 MeV

81.	_Which of the following can be used as a coolant in nuclear plant?$?
A.	Light or heavy water
B.	Molten lead
C.	Carbon dioxide
D.	Freon
Answer» B. Molten lead

82.	_Electron volt is the unit of$?
A.	Atomic power
B.	Energy
C.	Voltage
D.	Radio activity
Answer» C. Voltage

85.	_Reactors for propulsion applications are designed for$?
A.	Any form of uranium
B.	Natural uranium
C.	Enriched uranium
D.	Plutonium
Answer» D. Plutonium

71.	_ A moderator, apart from its high neutron slowing power, and low non-productive neutron, should be$?
A.	Stable under nuclear radiation
B.	Corrosion resistant
C.	Good thermal conductor
D.	All of these
Answer» E.

74.	__Plutonium is produced__
A.	As basic raw material
B.	By neutron irradiation of Uz
C.	By neutron irradiation of thorium
D.	Artificially
Answer» C. By neutron irradiation of thorium

76.	__Each fission of U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ produces following number of fast neutrons per fission__
A.	1 neutron
B.	3 neutrons
C.	1, 2 neutrons
D.	2 neutrons
Answer» E.

84.	_The most commonly used moderator in nuclear plants is$?
A.	Heavy water
B.	Concrete and bricks
C.	Graphite and concrete
D.	Graphite
Answer» E.

86.	_In triggering fission, which types of neutrons are more effective?$?
A.	Fast
B.	Slow
C.	In bulk
D.	Static
Answer» C. In bulk

89.	_Gas cooled reactor uses following materials as moderator, and coolant$?
A.	Graphite, CO2
B.	Graphite, air
C.	Heavy water, CO2
D.	Lead, H2
Answer» B. Graphite, air

90.	_The commonly used material for shielding is$?
A.	Lead or concrete
B.	Lead and tin
C.	Graphite or cadmium
D.	Thick galvanized sheets
Answer» B. Lead and tin

91.	_Reflector in nuclear power plants _________ neutron leakage.$?
A.	Increases
B.	Decreases
C.	Have no effect on
D.	None of these
Answer» C. Have no effect on

92.	_In a thermal power plant, coal from the coal handling plant is moved to the boiler bunker through a$?
A.	Belt conveyor
B.	Bucket conveyor
C.	Fork lift truck
D.	Overhead crane
Answer» B. Bucket conveyor

95.	Moderator in nuclear plants is used to$?
A.	Reduce temperature
B.	Extract heat from nuclear reaction
C.	Control the reaction
D.	Cause collision with the fast moving neutrons to reduce their speed
Answer» E.

Explore topic-wise MCQs in Mechanical Engineering.

*/*_In nuclear fission?

*/*_A moderator, apart from its high neutron slowing power, and low non-productive neutron, should be?

*/*_A nuclear reactor is said to be critical when the neutron population in the reactor core is?

*/*_Fast breeder reactor uses?

*/*_The unit of radioactivity is?

*/*_The efficiency of a nuclear power plant in comparison to a conventional thermal power plant is?

*/*_Amongst the following, the fissionable materials are?

%_Fast breeder reactor uses_%

%_In nuclear fission_%

%_Natural uranium is made up of_%

%_Which is not identical for an atom and an isotope?_%

%_Superheated steam is generated in following reactor_%

%_Breeder reactor has a conversion ratio of_%

%_The size of the reactor is said to be critical when_%

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

_ The efficiency of a nuclear power plant in comparison to a conventional thermal power plant is$?

_ Amongst the following, the fissionable materials are$?

_ The material most commonly used for shielding is$?

_ The unit of radioactivity is$?

_ A fission chain reaction in uranium can be developed$?

_ A moderator, apart from its high neutron slowing power, and low non-productive neutron, should be$?

__Boiling water reactor employs__

__Reflector in nuclear plants is used to__

__Plutonium is produced__

__Plutonium (Pu‚Äö√á√á‚Äö√á√â‚Äö√á√¢) is produced__

__Each fission of U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ produces following number of fast neutrons per fission__

__In the breeder reactors the generation of new fissionable atom is__

__In natural uranium, the constituents of three naturally occurring isotopes are__

_The total energy released in fission of U is$?

_U235 will undergo fission by$?

_Which of the following can be used as a coolant in nuclear plant?$?

_Electron volt is the unit of$?

_A fast breeder reactor uses following as fuel$?

_The most commonly used moderator in nuclear plants is$?

_Reactors for propulsion applications are designed for$?

_In triggering fission, which types of neutrons are more effective?$?

_A fast breeder reactor uses$?

_Pressurized water reactor is designed$?

_Gas cooled reactor uses following materials as moderator, and coolant$?

_The commonly used material for shielding is$?

_Reflector in nuclear power plants _________ neutron leakage.$?

_In a thermal power plant, coal from the coal handling plant is moved to the boiler bunker through a$?

_Which of the following are ferrite materials?$?

The secondary fuel used in nuclear power plants is$?

Moderator in nuclear plants is used to$?

The energy released during the fission of one atom of Uranium 235 in million electron volts is about$?

Plutonium (Pu239) is produced$?

In boiling water reactor, moderator is$?

A reactor capable of converting a ferrite material into fissile isotopes is called$?

The energy produced by a thermal reactor of same size as a breeder reactor is$?

/_In nuclear fission?

/_A moderator, apart from its high neutron slowing power, and low non-productive neutron, should be?

/_A nuclear reactor is said to be critical when the neutron population in the reactor core is?

/_Fast breeder reactor uses?

/_The unit of radioactivity is?

/_The efficiency of a nuclear power plant in comparison to a conventional thermal power plant is?

/_Amongst the following, the fissionable materials are?

Boiling water reactor employs

Reflector in nuclear plants is used to

Plutonium is produced

Plutonium (Pu‚Äö√á√á‚Äö√á√â‚Äö√á√¢) is produced

Each fission of U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ produces following number of fast neutrons per fission

In the breeder reactors the generation of new fissionable atom is

In natural uranium, the constituents of three naturally occurring isotopes are

96.	The energy released during the fission of one atom of Uranium 235 in million electron volts is about$?
A.	100
B.	200
C.	300
D.	400
Answer» C. 300

98.	In boiling water reactor, moderator is$?
A.	Coolant itself
B.	Ferrite rod
C.	Graphite rod
D.	Liquid sodium metal
Answer» B. Ferrite rod

99.	A reactor capable of converting a ferrite material into fissile isotopes is called$?
A.	Regenerative reactor
B.	Fast breeder reactor
C.	Breeder reactor
D.	Boiling water reactor
Answer» B. Fast breeder reactor

100.	The energy produced by a thermal reactor of same size as a breeder reactor is$?
A.	Almost same
B.	Slightly more
C.	Slightly less
D.	Much less
Answer» E.