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Nuclear Power Engineering

Nuclear Power Engineering
Specific gravity of uranium and plutonium is about

9
27
13
19

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Nuclear Power Engineering
Moderating material used in a thermal-reactor should be a

Good absorber of neutrons
None of these
Solid substance
Poor absorber of neutrons

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Nuclear Power Engineering
Which is the most commonly used molten metal for cooling of nuclear reactors?

Sodium
Zinc
Calcium
Mercury

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Nuclear Power Engineering
Heavy water is preferred over ordinary water as a coolant, because it.

Acts both as an efficient coolant as well as a moderator
Is less prone to radiation damage
Can be heated to a higher temperature without pressurizing
All of these

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Nuclear Power Engineering
Fission of U-235 on slow neutron bombardment can be represented by

92U235 + 0n1 → 92U236 + 3 0n1+ Q (energy)
92U235 + 0n1 → 56Ba143 + 36Kr90
92U235 + 0n1 → 56Ba143 + 36Kr90 + 3 0n1
92U235 + 0n1 → 56Ba143 + 36Kr90 + 3 0n1 + Q (energy)

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Nuclear Power Engineering
Uranium percentage in monazite sand is about

0.25
0.01
7
1.2

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