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Nuclear Science mcq questions and answers for competitive exams

Ramya_naidu

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Nuclear Science mcq questions and answers for competitive exams UPSC SSC , SSC CGL, SSC CHSL, upsc Civils , Entrance exams Online test practice online free Quiz, mock practice online
91.
The nucleus of an atom contains -

a
Only Neutrons
b
Protons and Electrons
c
Protons and Neutrons
d
Neutrons and Electrons
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92.
The age of most ancient geological formations is estimated by

a
C-14method
b
Ra - Si method
c
Uranium-lead method
d
Potassium - argon method
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93.
Which of the following is a non-fissile material?

a
Thorium-232
b
Uranium-233
c
Uranium-235
d
Plutonium-239
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94.
Atomic number of an element gives -

a
The number of protons in its atom
b
The number of nucleons in its atom
c
The weight of the atom of the element
d
The total number of elementary particles in its atom
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95.
Critical energy should be the neutron binding energy of the atom in order to initiate a nuclear fission.

a
equal to
b
less than
c
more than
d
either more or less
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96.
Mass excess for U-235 is

a
0.05 u
b
0.06 u
c
0.034 u
d
0.043 u
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97.
Candu reactor is a nuclear reactor.

a
fast breeder
b
homogeneous
c
highly enriched uranium (85 % U-235) fuelled
d
natural uranium fuelled heavy water cooled & moderated
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98.
The decay product of tritium (a beta emitter) is

a
helium
b
lithium
c
hydrogen
d
deuterium
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99.
Radioactive decay is a

a
random process
b
regular process
c
massive process
d
non-spontaneous process
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100.
At higher energy, bodies have

a
zero mass
b
small mass
c
large mass
d
smaller weight
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101.
Commercial power generation from fusion reactor is not yet possible, because

a
it is difficult to initiate fusion reaction.
b
it is difficult to control fusion reaction.
c
the fuel required (e.g. deuterium and tritium) is scarce.
d
quantity of fuel required for initiating fusion reaction is prohibitively high.
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102.
Which among the following is a positively charged particle emitted by a radioactive element?

a
Beta ray
b
Alpha ray
c
Cathode ray
d
Gamma ray
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103.
Greater decay constant

a
less size
b
less activity
c
greater size
d
greater activity
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104.
Thorium-232 is converted into uranium- 233 in a/an nuclear reactor.

a
thermal
b
fast breeder
c
enriched uranium
d
heavy water moderated
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105.
Which of the following may be used to measure the rate of nuclear disintegration?

a
Cyclotron
b
Cold chamber
c
Mass spectrograph
d
Geiger-Muller Counter
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