Nuclear Power Engineering MCQs with answers Page - 9

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Q. The atomic number of an element is equal to the number of __________ present in its atom.

  • (A) Neutrons
  • (B) Electrons
  • (C) Protons
  • (D) Either B or C

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Q. U-235 content in enriched uranium, that is normally used in power reactors (e.g., at Tarapur atomic power plant), is about ___________ percent.

  • (A) 3
  • (B) 50
  • (C) 85
  • (D) 97

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Q. The amount of a radioactive material (having a half life of 100 years) remaining after 400 years will be _______________ of its original weight.

  • (A) 1/2
  • (B) 1/4
  • (C) 1/8
  • (D) 1/16

A

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Q. In a homogeneous nuclear reactor, the __________ are mixed together.

  • (A) Fuel & coolant
  • (B) Fuel & moderator
  • (C) Coolant & moderator
  • (D) None of these

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Q. An electron has a mass that is approximately __________ that of the proton.

  • (A) 1836 (approximately)
  • (B) 1/1836 (approximately)
  • (C) 1
  • (D) ∞

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Q. Nucleus of 92U235 contains __________ protons.

  • (A) 92
  • (B) 235
  • (C) 143
  • (D) 325

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Q. Thermal neutrons which are used to cause the fission of U-235 have energy __________ eV.

  • (A) < 0.025
  • (B) > 1
  • (C) 1-25
  • (D) > 200

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Q. Primary purpose of a __________ nuclear reactor is to supply a high neutron flux of the order of 1013 to 1014 neutrons/cm2 second.

  • (A) Research
  • (B) Power
  • (C) Breeder
  • (D) Homogeneous

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Q. Velocity of the thermal neutron (< 0.025 eV) used for fission of U-235 is around __________ m/sec.

  • (A) 1
  • (B) 2200
  • (C) 3 × 1011
  • (D) 9 × 1021

A

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Q. Atoms of U-238 and U-235 differ in structure by three

  • (A) Electrons and three protons
  • (B) Protons
  • (C) Neutrons
  • (D) Electrons

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