nuclear power plants MCQs – Page 4

Practise focused nuclear power plants questions with marked answers for exam preparation and subject revision.

nuclear power plants Mcqs

61. Which of the following is more appropriate for a moderator. One which_________________?
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A. absorbs neutrons

B. regenerates neutrons

C. does not absorb neutrons

D. accelerates neutrons

E. eats up neutrons

62. Breeder reactors employ liquid metal coolant because it_______________?
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A. produces maximum steam

B. breeds neutrons

C. transfers heat from core at a fast rate

D. acts as good moderator

E. increases rate of reaction in core

63. Solid- fuel for nuclear reactions may be fabricated into various small shapes such as___________________?
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A. any one of the above

B. plates

C. pins

D. none of the above

E. pallets

64. The size of the reactor is said to be critical when_________________?
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A. chain reaction can be initiated

B. it produces no power

C. it explodes

D. it produces tremendous power

E. it becomes uncontrollable

65. Each fission of U235 produces following number of fast neutrons per fission________________?
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A. 1 neutrons

B. infinite

C. 2 neutrons

D. 1 neutron

E. 1 2 neutrons

66. In triggering fission, which type of neutrons are more effective_________________?
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A. activated

B. static

C. in bulk

D. slow

E. fast

67. The coolant used in boiling water reactor is________________?
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A. Co2

B. mixture of water and steam

C. liquid metal

D. mercury

E. pressurised water

68. The most practical fuel for a thermo-nuclear reactor, both from econocical and nuclear consideration is____________________?
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A. thorium

B. lithium

C. deuterium

D. uranium

E. plutonium

69. Which of the following type of pump is used in liquid metal cooled reactor for circulation of liquid metal_________________?
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A. reciprocation

B. axial

C. electromagnetic

D. diaphragm

E. centrifugal

70. The energy produced by a thermal reactor of same size as a breeder reactor is__________________?
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A. much more.

B. slightly less

C. almost same

D. slightly more

E. much less

71. A fast breeder reactor uses_______________?
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A. U-239

B. Pu-239

C. U-238

D. 90% U-235

E. U-235

72. Which of the following is the primary fuel________________?
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A. U

B. U238

C. Pu

D. Pu:

E. Ulii

73. The unit of radio-activity is_____________?
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A. curie

B. electron-ampere

C. AMU

D. electron-volt

E. MeV

74. A boiling water reactor uses following as fuel________________?
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A. plutonium

B. thorium

C. enriched uranium

D. natural uranium.

E. U

75. Reactors for propulsion applications use_________________?
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A. natural uranium

B. molten lead

C. thorium

D. any form of uranium

E. plutonium

76. Reactors designed for propulsion applications are designed for_______________?
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A. enriched uranium

B. pure uranium

C. none of the above

D. natural uranium

E. any type of uranium

77. Pressurised water reactor is designed________________?
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A. to prevent the water coolant from boiling in the core

B. to use intermediate coolant

C. for boiling pi water in the core

D. to eliminate the coolant loop of the pressurised water

E. to use liquid sodium metal as coolant

78. Pick up the wrong statement?
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A. In a heterogeneous or solid-fuel reactor, the fuel is mixed in a regular pattern within moderator.

B. Most serious drawback in using water as coolant in nuclear plants is its high vapour pressure

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

D. Fast neutrons have energies above 1000 eV

E. Fast reactor uses moderator

79. Effective moderators are those materials which contain____________________?
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A. heavy weight atoms

B. there is no such criterion

C. zero weight atoms

D. critical atoms

E. light weight atoms

80. The following present serious difficulty in designing reactor shield_________________?
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A. alpha particles

B. beta particles

C. thermal neutrons

D. fast neutrons and gamma rays

E. none of the above

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