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11
Nuclear reactors are provided with shield to guard against the emission of mainly . . . . . . . . rays.
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Answer: Option C
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12
Which of the following may not need a control rod?
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Answer: Option D
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13
Uranium percentage in monazite sand is about
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Answer: Option B
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14
The time required for half of the . . . . . . . . of a radioactive isotope to decay is called its half life.
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Answer: Option A
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15
Net efficiency of an ordinary (light) water cooled nuclear reactor is about . . . . . . . . per cent.
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Answer: Option A
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16
The radioisotope used to study the thyroid gland is
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Answer: Option A
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17
Fuel for a fast breeder reactor is
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Answer: Option D
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18
Out of the following places, a nuclear power plant is not located at
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Answer: Option A
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19
Atoms with the same number of neutrons, but different number of nucleons are called
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Answer: Option A
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20
. . . . . . . . nuclear reactor does not require a heat exchanger to supply steam to power turbine.
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Answer: Option C
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