Nuclear Power Engineering MCQs with answers Page - 1

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

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

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

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

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Q. 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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Q. 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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Q. Radioactive decay is a __________ change.

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

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Q. 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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Q. 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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