The predominant isotope of the naturally occurring element is%!

Pu‚Äö√á√á‚Äö√á√â‚Äö√á√â

U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ

U‚Äö√á√á‚Äö√á√â‚Äö√á√

Pu‚Äö√á√á‚Äö√á√â‚Äö√á√â

Pu‚Äö√á√á‚Äö√á√â‚Äö√á√¢

The efficiency of a nuclear power plant in comparison to conventional and nuclear consideration is%!

High heat rejection in condenser

Lower temperature and pressure conditions

A nuclear unit becoming critical means%!

It is generating power to rated capacity

It is capable of generating much more than rated capacity

There is danger of nuclear spread

Chain reaction that causes automatic splitting of the fuel nuclei has been established

Enriched uranium is one in which%!

Percentage of U has been artificially increased

Percentage of U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ has been artificially increased

Percentage of U has been artificially increased

Percentage of U‚Äö√á√á‚Äö√á√â‚Äö√á√ë has been artificially increased

Extra energy is pumped from outside

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

It produces more fuel than it consumes

It requires highly enriched fuel

It requires liquid sodium metal as moderator

The efficiency of a nuclear power plant in comparison to conventional and nuclear consideration is%!

High heat rejection in condenser

Lower temperature and pressure conditions

Pick up the wrong statement%!

In a heterogeneous or solid fuel reactor, the fuel is mixed in a regular pattern within moderator

Slow or thermal neutrons have energy of the order or 0.025 eV

Fast neutrons have energies above 1000 eV

For economical operation of a nuclear plant%!

Used fuel should be reprocessed

*$_The efficiency of a nuclear power plant in comparison to conventional and nuclear consideration is?

High heat rejection in condenser

Lower temperature and pressure conditions

*$_Pick up the wrong statement?

In a heterogeneous or solid fuel reactor, the fuel is mixed in a regular pattern within moderator

Slow or thermal neutrons have energy of the order or 0.025 eV

Fast neutrons have energies above 1000 eV

*$_For economical operation of a nuclear plant?

Used fuel should be reprocessed

*$_A nuclear unit becoming critical means?

It is generating power to rated capacity

It is capable of generating much more than rated capacity

There is danger of nuclear spread

Chain reaction that causes automatic splitting of the fuel nuclei has been established

*$_Enriched uranium is one in which?

Percentage of U has been artificially increased

Percentage of U‚Äö√á√á‚Äö√á√â‚Äö√á√ñ has been artificially increased

Percentage of U has been artificially increased

Percentage of U‚Äö√á√á‚Äö√á√â‚Äö√á√ë has been artificially increased

Extra energy is pumped from outside

*$_Which of the following statement is correct regarding the features of a Breeder reactor??

It produces more fuel than it consumes

It requires highly enriched fuel

It requires liquid sodium metal as moderator

*/*_Ideally the neutron flux in reactor should be?

Maximum in centre and zero at side

Maximum at side and zero in canter

*/*_The presence of reflector in nuclear power plants results in?

Increased production of neutrons

Complete absorption of neutrons

Controlled production of neutrons

*/*_The nuclear radiators produced in a reactor which must be shielded are?

≈í¬±, ≈í‚â§ and ≈í‚â• rays

*/*_The size of the reactor is said to be critical when?

Chain reaction can be initiated

*/*_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

*/*_U238 will undergo fission by?

Low energy (slow) neutrons alone

High energy (fast) neutrons alone

Low energy (slow) neutrons alone

*/*_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√

150 + Mcqs in Power Plant Engineering in Mechanical Engineering Page 1 McqOptions

1.	A nuclear fission is initiated when the critical energy as compared to neutron binding energy of the atoms is%!
A.	Same
B.	More
C.	Less
D.	There is no such criterion
Answer» C. Less

2.	A nuclear fission produces energy of following order in MeV%!
A.	20
B.	200
C.	2000
D.	20,000
Answer» C. 2000

4.	Hydrogen is preferred as better coolant in comparison to CO‚Äö√á√á because former%!
A.	Is lighter
B.	Is inert
C.	Has high specific heat
D.	Is a good conductor
Answer» D. Is a good conductor

5.	The efficiency of a nuclear power plant in comparison to conventional and nuclear consideration is%!
A.	Higher cost of nuclear fuel
B.	High initial cost
C.	High heat rejection in condenser
D.	Lower temperature and pressure conditions
Answer» E.

6.	Which of the following is the heaviest?%!
A.	Neutron
B.	Proton
C.	Atom
D.	Electron
Answer» D. Electron

8.	The risk of radioactive hazard is greatest in the turbine with following reactor%!
A.	Pressurised water
B.	Boiling water
C.	Gas cooled
D.	Liquid metal cooled
Answer» C. Gas cooled

9.	The function of control rods in nuclear plants is to%!
A.	Control temperature
B.	Control radioactive pollution
C.	Control absorption of neutron
D.	Control fuel consumption
Answer» D. Control fuel consumption

11.	The energy required to be applied to a radioactive nucleus for the emission of a neutron is%!
A.	1 MeV
B.	2.4 MeV
C.	4.3 MeV
D.	7.8 MeV
Answer» E.

15.	One gram of uranium will produce energy equivalent to approximately%!
A.	1 tonne of high grade coal
B.	4.5 tonnes of high grade coal
C.	10 tonnes of high grade coal
D.	100 tonnes of high grade coal
Answer» C. 10 tonnes of high grade coal

16.	Effective moderators are those materials which contain%!
A.	Light weight atoms
B.	Heavy weight atoms
C.	Critical atoms
D.	Zero weight atoms
Answer» B. Heavy weight atoms

17.	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

19.	In order to have constant chain reaction to produce a constant rate of heat output, the value of ratio of the number of neutrons in one generation to the number of neutrons in the immediately preceding generation must be%!
A.	Greater than 1.0
B.	Less than 1.0
C.	Equal to zero
D.	Equal to 1.0
Answer» E.

28.	*$_In order to have constant chain reaction to produce a constant rate of heat output, the value of ratio of the number of neutrons in one generation to the number of neutrons in the immediately preceding generation must be?
A.	Greater than 1.0
B.	Less than 1.0
C.	Equal to zero
D.	Equal to 1.0
Answer» E.

39.	/_The process by which a heavy nucleus is spitted into two light nuclei is known as?
A.	Splitting
B.	Fission
C.	Fusion
D.	Disintegration
Answer» C. Fusion

20.	For economical operation of a nuclear plant%!
A.	Used fuel should be reprocessed
B.	Moderator should be used
C.	Coolant should be employed
D.	Control rods should be used
Answer» B. Moderator should be used

21.	*$_Which of the following is the heaviest??
A.	Neutron
B.	Proton
C.	Atom
D.	Electron
Answer» D. Electron

24.	*$_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

25.	*$_Effective moderators are those materials which contain?
A.	Light weight atoms
B.	Heavy weight atoms
C.	Critical atoms
D.	Zero weight atoms
Answer» B. Heavy weight atoms

26.	*$_One gram of uranium will produce energy equivalent to approximately?
A.	1 tonne of high grade coal
B.	4.5 tonnes of high grade coal
C.	10 tonnes of high grade coal
D.	100 tonnes of high grade coal
Answer» C. 10 tonnes of high grade coal

29.	*$_The energy required to be applied to a radioactive nucleus for the emission of a neutron is?
A.	1 MeV
B.	2.4 MeV
C.	4.3 MeV
D.	7.8 MeV
Answer» E.

31.	*$_The function of control rods in nuclear plants is to?
A.	Control temperature
B.	Control radioactive pollution
C.	Control absorption of neutron
D.	Control fuel consumption
Answer» D. Control fuel consumption

33.	*$_The risk of radioactive hazard is greatest in the turbine with following reactor?
A.	Pressurised water
B.	Boiling water
C.	Gas cooled
D.	Liquid metal cooled
Answer» C. Gas cooled

34.	*$_Hydrogen is preferred as better coolant in comparison to CO‚Äö√á√á because former?
A.	Is lighter
B.	Is inert
C.	Has high specific heat
D.	Is a good conductor
Answer» D. Is a good conductor

38.	/_In triggering fission, the following types of neutrons are desirable?
A.	Fast moving
B.	Slow moving
C.	Critical neutrons
D.	Neutrons at rest
Answer» C. Critical neutrons

Explore topic-wise MCQs in Mechanical Engineering.

A nuclear fission is initiated when the critical energy as compared to neutron binding energy of the atoms is%!

A nuclear fission produces energy of following order in MeV%!

The predominant isotope of the naturally occurring element is%!

Hydrogen is preferred as better coolant in comparison to CO‚Äö√á√á because former%!

The efficiency of a nuclear power plant in comparison to conventional and nuclear consideration is%!

Which of the following is the heaviest?%!

A nuclear unit becoming critical means%!

The risk of radioactive hazard is greatest in the turbine with following reactor%!

The function of control rods in nuclear plants is to%!

Enriched uranium is one in which%!

The energy required to be applied to a radioactive nucleus for the emission of a neutron is%!

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

The efficiency of a nuclear power plant in comparison to conventional and nuclear consideration is%!

Which of the following is the heaviest?%!

One gram of uranium will produce energy equivalent to approximately%!

Effective moderators are those materials which contain%!

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

Pick up the wrong statement%!

In order to have constant chain reaction to produce a constant rate of heat output, the value of ratio of the number of neutrons in one generation to the number of neutrons in the immediately preceding generation must be%!

For economical operation of a nuclear plant%!

*$_Which of the following is the heaviest??

*$_The efficiency of a nuclear power plant in comparison to conventional and nuclear consideration is?

*$_Pick up the wrong statement?

*$_The control rods in the control system of nuclear reactors are used to?

*$_Effective moderators are those materials which contain?

*$_One gram of uranium will produce energy equivalent to approximately?

*$_For economical operation of a nuclear plant?

*$_In order to have constant chain reaction to produce a constant rate of heat output, the value of ratio of the number of neutrons in one generation to the number of neutrons in the immediately preceding generation must be?

*$_The energy required to be applied to a radioactive nucleus for the emission of a neutron is?

*$_A nuclear unit becoming critical means?

*$_The function of control rods in nuclear plants is to?

*$_Enriched uranium is one in which?

*$_The risk of radioactive hazard is greatest in the turbine with following reactor?

*$_Hydrogen is preferred as better coolant in comparison to CO‚Äö√á√á because former?

*$_Which of the following statement is correct regarding the features of a Breeder reactor??

*/*_Ideally the neutron flux in reactor should be?

*/*_The presence of reflector in nuclear power plants results in?

*/*_In triggering fission, the following types of neutrons are desirable?

*/*_The process by which a heavy nucleus is spitted into two light nuclei is known as?

*/*_Atomic number of an element in the periodic table represents the numbers of?

*/*_The nuclear radiators produced in a reactor which must be shielded are?

*/*_The main interest of shielding in nuclear reactor is protection against?

*/*_Breeder reactor has a conversion ratio of?

*/*_The size of the reactor is said to be critical when?

*/*_A fission chain reaction in uranium can be developed?

*/*_The material most commonly used for shielding is?

*/*_U238 will undergo fission by?

*/*_Superheated steam is generated in following reactor?

*/*_Natural uranium is made up of?

*/*_Which is not identical for an atom and an isotope??

/_Ideally the neutron flux in reactor should be?

/_The presence of reflector in nuclear power plants results in?

/_In triggering fission, the following types of neutrons are desirable?

/_The process by which a heavy nucleus is spitted into two light nuclei is known as?

/_Atomic number of an element in the periodic table represents the numbers of?

/_The nuclear radiators produced in a reactor which must be shielded are?

/_The main interest of shielding in nuclear reactor is protection against?

/_Breeder reactor has a conversion ratio of?

/_The size of the reactor is said to be critical when?

/_A fission chain reaction in uranium can be developed?

/_The material most commonly used for shielding is?

/_U238 will undergo fission by?

/_Superheated steam is generated in following reactor?

/_Natural uranium is made up of?

/_Which is not identical for an atom and an isotope??

40.	/_Atomic number of an element in the periodic table represents the numbers of?
A.	Protons in the nucleus
B.	Electrons in the nucleus
C.	Neutrons in the nucleus
D.	Electrons in the atom
Answer» B. Electrons in the nucleus

41.	/_The nuclear radiators produced in a reactor which must be shielded are?
A.	Electrons
B.	≈í¬±, ≈í‚â§ and ≈í‚â• rays
C.	Neutron and gamma rays
D.	None of these
Answer» D. None of these

42.	/_The main interest of shielding in nuclear reactor is protection against?
A.	X-rays
B.	Infrared rays
C.	Neutrons and gamma rays
D.	Electrons
Answer» E.

43.	/_Breeder reactor has a conversion ratio of?
A.	Unity
B.	More than unity
C.	Less than unity
D.	Zero
Answer» C. Less than unity

44.	/_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

46.	/_The material most commonly used for shielding is?
A.	Carbon
B.	Lead
C.	Concrete
D.	All of these
Answer» D. All of these

50.	/_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