Nuclear Power Engineering MCQ Questions & Answers

1

Which of the following gases has very high neutron capture cross-section, making it unsuitable as a coolant in nuclear reactor?

A) N₂ B) He C) CO₂ D) H₂

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Answer & Solution

Answer: Option A

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2

Heavy water (D₂O) in a nuclear reactor serves as a

A) Coolant B) Moderator C) Both A & B D) Neutron absorber

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Answer & Solution

Answer: Option C

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3

Moderating material used in a thermal-reactor should be a

A) Good absorber of neutrons B) Solid substance C) Poor absorber of neutrons D) None of these

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Answer & Solution

Answer: Option C

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4

The ₉₂U²³⁸ emits an a-particle. The product is

A) ₉₀U²³⁴ B) ₉₀U²³⁸ C) ₉₀U²³⁶ D) ₉₂U²³⁶

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Answer & Solution

Answer: Option A

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5

Nuclear fuel generally used in reactors is uranium oxide instead of uranium, because the former has higher

A) Melting point, hence can be subjected to higher temperature B) Density ; hence core volume for a given power output would be smaller C) Resistance to effects of irradiation D) All of the above

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Answer & Solution

Answer: Option D

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6

__________ have the same mass number, but different nuclear charge.

A) Isotopes B) Isobars C) Isotones D) None of these

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Answer & Solution

Answer: Option B

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7

Water is a better coolant than a gas (like CO₂, He, N₂ etc.), because it

A) Is a better neutron moderator as well B) Requires comparatively smaller pumps and heat exchanger for a given heat transfer rate C) Has a better heat transfer characteristics and it can be pressurised to attain a high temperature D) All of the above

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Answer & Solution

Answer: Option D

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8

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

A) Calcium B) Sodium C) Mercury D) Zinc

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Answer & Solution

Answer: Option B

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9

Radioactive decay is a __________ change.

A) Chemical B) Nuclear C) Physical D) None of these

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Answer & Solution

Answer: Option B

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10

Heavy water used in the nuclear reactors to slow down the speed of neutrons is

A) Highly purified water B) A compound of oxygen and deuterium C) Water having dissolved salts of heavy metals D) None of these

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Answer & Solution

Answer: Option B

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Nuclear Power Engineering MCQ Questions & Answers | Chemical Engineering