Nuclear Power Engineering MCQs with answers Page - 4

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Q. The decrease in the atomic number is not observed in case of

  • (A) Electron capture
  • (B) β-emission
  • (C) α-emission
  • (D) Positron emission

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Q. The critical mass of a fissionable material can be reduced by

  • (A) Heating it
  • (B) Cooling it
  • (C) Surrounding it by neutron reflecting material
  • (D) Surrounding it by neutron absorbing material

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Q. Nuclear fuel usually used in a Boiling Water Reactor (BWR) is

  • (A) Plutonium
  • (B) Enriched uranium
  • (C) Natural uranium
  • (D) Thorium

A

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Q. The velocity of thermal (slow) neutrons triggering nuclear fission reaction (having energy equal to 0.025 eV) is about __________ metres/second.

  • (A) 1100
  • (B) 2200
  • (C) 3300
  • (D) 4400

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Q. Pick out the correct statement.

  • (A) Positron is the antiparticle of electron
  • (B) In α-decay, the ratio of neutron to proton decreases
  • (C) Ionising power of β-rays is higher than that of α-rays
  • (D) Speed of α-rays is more than that of γ

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Q. Which of the following is present in Bhabha Atomic Research Centre (BARC) complex, Trombay (Bombay)?

  • (A) Power reactor
  • (B) Research reactor
  • (C) Fast breeder reactor
  • (D) Heavy water plant

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Q. Safety rods provided in nuclear reactors to guard against accidents, in case of earthquake are made of

  • (A) High carbon steel
  • (B) Molybdenum
  • (C) Zircalloy
  • (D) Boron or cadmium

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Q. Which is a fertile nuclear fuel?

  • (A) U-233
  • (B) U-235
  • (C) Pu-239
  • (D) Th-232

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Q. Which of the following is not used as a nuclear fuel cladding material?

  • (A) Zircalloy
  • (B) Ceramics
  • (C) Cadmium
  • (D) Stainless steel

A

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Q. Number of secondary neutron emitted on fission of an atom of U-235 by slow neutron bombardment is

  • (A) 3
  • (B) 92
  • (C) 200
  • (D) 235

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