Commercial power generation from fusion reactor is not yet possible, because

the fuel required (i.e., deuterium & tritium) is scarce.

it is difficult to control nuclear fusion reaction.

the fuel required (i.e., deuterium & tritium) is scarce.

it is difficult to initiate fusion reaction.

quantity of fuel required for initiating fusion reaction is prohibitively high.

"Critical mass" is the minimum mass of nuclear fissile material required for the

power generation on commercial scale.

Molten sodium (as a coolant in fast breeder reactor)

can't attain high temperature at normal pressure.

is not at all corrosive, even at a higher temperature.

is highly radioactive at elevated temperatures and can cause explosion, when it comes in contact with air or water.

Heat is generated in a nuclear reactor (thermal) by

combustion of a nuclear fuel e.g. uranium.

absorption of neutrons in uranium atoms.

A boiling water reactor is the one, in which the

coolant water, after being heated in the reactor core, generates steam in a boiler.

coolant water is allowed to boil in the core of the reactor.

coolant water, after being heated in the reactor core, generates steam in a boiler.

pressurised water is pumped into the core.

fuel and the coolant are thoroughly mixed to form a homogeneous solution.

Nuclear power generation capacity in India is

more than hydroelectric power generation capacity.

more than thermal power generation capacity.

Gas cooling as compared to water cooling of nuclear reactors

can not attain a high temperature.

is more efficient as gas has a higher specific heat.

can produce only saturated steam for feeding to power turbine.

Tarapur atomic power station

has two boiling water reactors of American design.

has an installed capacity of 400 MW.

is the first power reactor in India, which became critical in 1969.

H2 is a better coolant than CO2, due to its relatively

lower neutron capture cross-section.

should have small absorption cross-section.

is generally made of boron, hafnium or cadmium.

should have large absorption cross-section.

The mass number of an element is equal to the number of __________ in the nucleus.

neutrons plus protons (i.e., nucleons)

Which of the following accounts for the maximum energy release in the nuclear fission process ?

Radioactive decay of fission products

Kinetic energy of fission products

Radioactive decay of fission products

Instantaneous release of Œ≥-rays

Which of the following is a moderating material used in nuclear reactor ?

Zircalloy (an alloy of zirconium and aluminium).

The emission of an a-particle causes the resultant nucleus to have

less atomic weight and less atomic number.

more atomic weight and less atomic number.

less atomic weight and less atomic number.

less atomic weight and more atomic number.

The function of moderators in nuclear reactor is to

slow down the secondary neutrons.

486 + Mcqs in Nuclear Power Engineering in Chemical Engineering Page 9 McqOptions

401.	A radioactive substance does not emit
A.	Œ±-ray
B.	proton
C.	position
D.	Œ≤-ray
Answer» C. position

Discussion

402.	MeV is the unit of
A.	radioactivity
B.	energy
C.	potential difference
D.	none of these
Answer» C. potential difference

Discussion

403.	The atomic number of an element is equal to the number of __________ present in its atom.
A.	neutrons
B.	electrons
C.	protons
D.	either (b) or (c)
Answer» E.

Discussion

404.	The new nucleus formed after Œ≤-decay of a radioactive element has$
A.	less atomic number
B.	less atomic weight
C.	more atomic number
D.	more atomic weight
Answer» B. less atomic weight

Discussion

405.	Commercial power generation from fusion reactor is not yet possible, because
A.	it is difficult to control nuclear fusion reaction.
B.	the fuel required (i.e., deuterium & tritium) is scarce.
C.	it is difficult to initiate fusion reaction.
D.	quantity of fuel required for initiating fusion reaction is prohibitively high.
Answer» B. the fuel required (i.e., deuterium & tritium) is scarce.

Discussion

406.	A radioactive isotope undergoes decay with respect to time following __________ law.
A.	logarithmic
B.	exponential
C.	linear
D.	inverse square
Answer» C. linear

Discussion

407.	Which one is the radioactive isotope of hydrogen ?
A.	Deuterium
B.	Ortho-hydrogen
C.	Tritium
D.	None of these
Answer» D. None of these

Discussion

408.	Which is a fertile nuclear fuel ?
A.	U-233
B.	U-235
C.	Pu-239
D.	Th-232
Answer» E.

Discussion

409.	Which of the following is not used as a moderator in nuclear reactor ?
A.	Molten sodium
B.	Light water
C.	Beryllium
D.	Boron hydride
Answer» B. Light water

Discussion

410.	The amount of a radioisotope remaining undecayed after a time equal to four times its half life, will be __________ percent.
A.	3.125
B.	6.25
C.	12.5
D.	25
Answer» C. 12.5

Discussion

411.	"Critical mass" is the minimum mass of nuclear fissile material required for the
A.	sustainment of chain reaction.
B.	power generation on commercial scale.
C.	economic power generation.
D.	none of these.
Answer» B. power generation on commercial scale.

Discussion

412.	Isotopes of an element have the same
A.	number of neutrons
B.	mass number
C.	electronic configuration
D.	atomic weight
Answer» D. atomic weight

Discussion

413.	Enrichment of uranium is done to increase the concentration of __________ in the natural uranium.
A.	U-238
B.	U-233
C.	U-235
D.	Pu-239
Answer» D. Pu-239

Discussion

414.	Fast breeder Test Reactor (FBTR) is located at
A.	Kalpakkam (near Madras).
B.	Kota (in Rajasthan).
C.	BARC (Trombay).
D.	Tarapur (in Maharashtra).
Answer» B. Kota (in Rajasthan).

Discussion

415.	Nuclear reactors are provided with shield to guard against the emission of mainly __________ rays.
A.	X
B.	Œ± and Œ≤
C.	neutrons & gamma
D.	infrared
Answer» D. infrared

Discussion

416.	Atoms of U-238 and U-235 differ in structure by three
A.	electrons and three protons
B.	protons
C.	neutrons
D.	electrons
Answer» D. electrons

Discussion

417.	The phenomenon of nuclear fission is opposite to that of
A.	radioactive decay
B.	thermionic emission
C.	nuclear fusion
D.	combustion
Answer» D. combustion

Discussion

418.	Enriched uranium means that, it contains
A.	more than 0.71% of U-235.
B.	only fertile material.
C.	only fissile material.
D.	no impurities.
Answer» B. only fertile material.

Discussion

419.	Which of the following is not used as a nuclear fuel cladding material ?
A.	Zircalloy
B.	Cadmium
C.	Ceramics
D.	Stainless steel
Answer» C. Ceramics

Discussion

420.	Molten sodium (as a coolant in fast breeder reactor)
A.	can't attain high temperature at normal pressure.
B.	is not at all corrosive, even at a higher temperature.
C.	is highly radioactive at elevated temperatures and can cause explosion, when it comes in contact with air or water.
D.	none of these
Answer» D. none of these

Discussion

421.	Heat is generated in a nuclear reactor (thermal) by
A.	combustion of a nuclear fuel e.g. uranium.
B.	fusion of atoms of uranium.
C.	absorption of neutrons in uranium atoms.
D.	fission of U-235 by neutrons.
Answer» E.

Discussion

422.	Moderating material used in a thermal-reactor should be a
A.	good absorber of neutrons.
B.	solid substance.
C.	poor absorber of neutrons.
D.	none of these.
Answer» D. none of these.

Discussion

423.	A boiling water reactor is the one, in which the
A.	coolant water is allowed to boil in the core of the reactor.
B.	coolant water, after being heated in the reactor core, generates steam in a boiler.
C.	pressurised water is pumped into the core.
D.	fuel and the coolant are thoroughly mixed to form a homogeneous solution.
Answer» B. coolant water, after being heated in the reactor core, generates steam in a boiler.

Discussion

424.	Nuclear power generation capacity in India is
A.	3000 MW.
B.	10000 MW.
C.	more than hydroelectric power generation capacity.
D.	more than thermal power generation capacity.
Answer» B. 10000 MW.

Discussion

425.	Gas cooling as compared to water cooling of nuclear reactors
A.	can not attain a high temperature.
B.	is more efficient as gas has a higher specific heat.
C.	can produce only saturated steam for feeding to power turbine.
D.	none of these.
Answer» E.

Discussion

426.	Tarapur atomic power station
A.	has two boiling water reactors of American design.
B.	has an installed capacity of 400 MW.
C.	is the first power reactor in India, which became critical in 1969.
D.	all (a), (b) and (c).
Answer» E.

Discussion

427.	The ratio of volume of an atom to that of its nucleus is
A.	1012
B.	43809
C.	43687
D.	108
Answer» B. 43809

Discussion

428.	H2 is a better coolant than CO2, due to its relatively
A.	lower density.
B.	higher specific heat.
C.	non-reactivity to uranium.
D.	lower neutron capture cross-section.
Answer» C. non-reactivity to uranium.

Discussion

429.	Main source of __________ is monazite sand.
A.	uranium
B.	polonium
C.	hafnium
D.	thorium
Answer» E.

Discussion

430.	Radioactive decay is a __________ change.
A.	chemical
B.	nuclear
C.	physical
D.	none of these
Answer» C. physical

Discussion

431.	Uranium Corporation of India Limited (UCIL) engaged in the mining & concentration of uranium ore is located at
A.	Alwaye (in Kerala)
B.	Jadugoda (in Jharkhand)
C.	Kalpakkam (in Tamilnadu)
D.	Gopalpur coast (in Orissa)
Answer» C. Kalpakkam (in Tamilnadu)

Discussion

432.	The time taken for a radioactive element to reduce to 50% of its original weight is __________ years, if its half life period is 12 years.
A.	24
B.	18
C.	6
D.	36
Answer» C. 6

Discussion

433.	Velocity of the thermal neutron (< 0.025 eV) used for fission of U-235 is around __________ m/sec.
A.	1
B.	2200
C.	3 x 1011
D.	9 x 1021
Answer» C. 3 x 1011

Discussion

434.	Thorium-232 is converted into uranium-233 in a/an __________ nuclear reactor.
A.	thermal
B.	fast breeder
C.	heavy water moderated
D.	enriched uranium
Answer» C. heavy water moderated

Discussion

435.	Sodium melts (at atmospheric pressure) at a temperature of __________ ¬∞C.
A.	58
B.	98
C.	348
D.	588
Answer» C. 348

Discussion

436.	A control rod
A.	should have small absorption cross-section.
B.	is generally made of boron, hafnium or cadmium.
C.	should have large absorption cross-section.
D.	both (b) and (c).
Answer» E.

Discussion

437.	Nuclides having the same atomic numbers are termed as
A.	isotopes
B.	isomers
C.	isotones
D.	isobars
Answer» C. isotones

Discussion

438.	The mass number of an element is equal to the number of __________ in the nucleus.
A.	electrons
B.	neutrons
C.	protons
D.	neutrons plus protons (i.e., nucleons)
Answer» E.

Discussion

439.	Which of the following accounts for the maximum energy release in the nuclear fission process ?
A.	Kinetic energy of fission products
B.	Radioactive decay of fission products
C.	Instantaneous release of Œ≥-rays
D.	Kinetic energy of neutrons
Answer» B. Radioactive decay of fission products

Discussion

440.	Thermal nuclear reactors using enriched uranium as fuel contains a maximum of __________ percent fissile material i.e. U-235.
A.	1
B.	2
C.	3
D.	7
Answer» D. 7

Discussion

441.	Nucleus of 92U235 contains __________ protons.
A.	92
B.	235
C.	143
D.	325
Answer» B. 235

Discussion

442.	Which of the following is a moderating material used in nuclear reactor ?
A.	Graphite.
B.	Cadmium.
C.	Zircalloy (an alloy of zirconium and aluminium).
D.	Stainless steel.
Answer» B. Cadmium.

Discussion

443.	Number of secondary neutron emitted on fission of an atom of U-235 by slow neutron bombardment is
A.	3
B.	235
C.	200
D.	92
Answer» B. 235

Discussion

444.	Which of the following may not need a moderator ?
A.	Candu reactor
B.	Fast breeder reactor
C.	Homogeneous reactor
D.	Pressurised water reactor
Answer» C. Homogeneous reactor

Discussion

445.	The emission of an a-particle causes the resultant nucleus to have
A.	more atomic weight and less atomic number.
B.	less atomic weight and less atomic number.
C.	less atomic weight and more atomic number.
D.	none of these.
Answer» B. less atomic weight and less atomic number.

Discussion

446.	Which of the following types of nuclear reactors is most prone to radioactive hazards ?
A.	Pressurised water reactor
B.	Gas cooled reactor
C.	Molten sodium cooled reactor
D.	Boiling water reactor
Answer» E.

Discussion

447.	Which is not a fissile nuclear material ?
A.	U-233
B.	U-235
C.	U-238
D.	Pu-239
Answer» D. Pu-239

Discussion

448.	The function of moderators in nuclear reactor is to
A.	slow down the secondary neutrons.
B.	absorb the secondary neutrons.
C.	control the chain reaction.
D.	none of these.
Answer» B. absorb the secondary neutrons.

Discussion

449.	Which of the following gases has very high neutron capture cross-section, making it unsuitable as a coolant in nuclear reactor?
A.	N2
B.	He
C.	CO2
D.	H2
Answer» B. He

Discussion

450.	The largest stable nucleus is
A.	U-235
B.	U-238
C.	Pb-206
D.	Bi-209
Answer» B. U-238

Discussion

Explore topic-wise MCQs in Chemical Engineering.

A radioactive substance does not emit

MeV is the unit of

The atomic number of an element is equal to the number of __________ present in its atom.

The new nucleus formed after Œ≤-decay of a radioactive element has$

Commercial power generation from fusion reactor is not yet possible, because

A radioactive isotope undergoes decay with respect to time following __________ law.

Which one is the radioactive isotope of hydrogen ?

Which is a fertile nuclear fuel ?

Which of the following is not used as a moderator in nuclear reactor ?

The amount of a radioisotope remaining undecayed after a time equal to four times its half life, will be __________ percent.

"Critical mass" is the minimum mass of nuclear fissile material required for the

Isotopes of an element have the same

Enrichment of uranium is done to increase the concentration of __________ in the natural uranium.

Fast breeder Test Reactor (FBTR) is located at

Nuclear reactors are provided with shield to guard against the emission of mainly __________ rays.

Atoms of U-238 and U-235 differ in structure by three

The phenomenon of nuclear fission is opposite to that of

Enriched uranium means that, it contains

Which of the following is not used as a nuclear fuel cladding material ?

Molten sodium (as a coolant in fast breeder reactor)

Heat is generated in a nuclear reactor (thermal) by

Moderating material used in a thermal-reactor should be a

A boiling water reactor is the one, in which the

Nuclear power generation capacity in India is

Gas cooling as compared to water cooling of nuclear reactors

Tarapur atomic power station

The ratio of volume of an atom to that of its nucleus is

H2 is a better coolant than CO2, due to its relatively

Main source of __________ is monazite sand.

Radioactive decay is a __________ change.

Uranium Corporation of India Limited (UCIL) engaged in the mining & concentration of uranium ore is located at

The time taken for a radioactive element to reduce to 50% of its original weight is __________ years, if its half life period is 12 years.

Velocity of the thermal neutron (< 0.025 eV) used for fission of U-235 is around __________ m/sec.

Thorium-232 is converted into uranium-233 in a/an __________ nuclear reactor.

Sodium melts (at atmospheric pressure) at a temperature of __________ ¬∞C.

A control rod

Nuclides having the same atomic numbers are termed as

The mass number of an element is equal to the number of __________ in the nucleus.

Which of the following accounts for the maximum energy release in the nuclear fission process ?

Thermal nuclear reactors using enriched uranium as fuel contains a maximum of __________ percent fissile material i.e. U-235.

Nucleus of 92U235 contains __________ protons.

Which of the following is a moderating material used in nuclear reactor ?

Number of secondary neutron emitted on fission of an atom of U-235 by slow neutron bombardment is

Which of the following may not need a moderator ?

The emission of an a-particle causes the resultant nucleus to have

Which of the following types of nuclear reactors is most prone to radioactive hazards ?

Which is not a fissile nuclear material ?

The function of moderators in nuclear reactor is to

Which of the following gases has very high neutron capture cross-section, making it unsuitable as a coolant in nuclear reactor?

The largest stable nucleus is