Question 1 : Which of the following is a non-fissile material ?
1. Plutonium-239
2. Uranium-233
3. Uranium-235
4. Thorium-232
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Question 2 : Candu reactor is a __________ nuclcear reactor.
1. natural uranium fuelled heavy water cooled & moderated
2. fast breeder
3. highly enriched uranium (85% U-235) fuelled
4. homogeneous
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Question 3 : Nucleus of tritium has __________ neutrons.
1. 3
2. 1
3. 4
4. 2
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Question 4 : Percentage of natural uranium present in uranium ore found in Jadugoda (Jharkhand) is
1. 2
2. 1
3. 0.1
4. 12
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Question 5 : U-235 content in enriched uranium, that is normally used in power reactors (e.g., at Tarapur atomic power plant), is about __________ percent.
1. 97
2. 85
3. 3
4. 50
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Question 6 : The half life period of a radiactive element is 100 days. After 400 days, one gm of the element will be reduced to __________ gm.
1. 1/16
2. 1/2
3. 1/4
4. 1/8
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Question 7 : First experimental observation of nuclear fission was done by
1. Rutherford
2. Plane
3. Hahn and Strassman
4. Fermi
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Question 8 : Coolant present in the primary circuit of a pressurised water reactor is high pressure
1. saturated water
2. saturated steam
3. sub cooled water
4. superheated steam
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Question 9 : Function of control rod in a nuclear reactor is to control
1. pressure
2. temperature
3. absorption of neutrons
4. fuel consumption
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Question 10 : Unit of radioactivity is
1. fermi
2. angstrom
3. curie
4. barn
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