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MCQs

Total Questions : 807 | Page 6 of 81 pages
Question 51. The coolant used in boiling water reactor is
  1.    CO2
  2.    Pressurised water
  3.    Mixture of water and steam
  4.    Liquid metal
 Discuss Question
Answer: Option C. -> Mixture of water and steam
Question 52. A moderator
  1.    Absorbs neutrons
  2.    Does not absorb neutrons
  3.    Accelerates neutrons
  4.    None of these
 Discuss Question
Answer: Option B. -> Does not absorb neutrons
Question 53. The efficiency of a nuclear power plant in comparison to a conventional thermal power plant is
  1.    Same
  2.    More
  3.    Less
  4.    May be less or mote depending on size
 Discuss Question
Answer: Option C. -> Less
Question 54. Pressurized water reactor is designed
  1.    For boiling pi water in the core
  2.    To use liquid sodium metal as coolant
  3.    To use intermediate coolant
  4.    To prevent the water coolant from boiling in the core
 Discuss Question
Answer: Option D. -> To prevent the water coolant from boiling in the core
Question 55. Effective moderators are those materials which contain
  1.    Light weight atoms
  2.    Heavy weight atoms
  3.    Critical atoms
  4.    Zero weight atoms
 Discuss Question
Answer: Option A. -> Light weight atoms
Question 56. Isotopes of same elements have
  1.    Same atomic number and different masses
  2.    Same chemical properties but different atomic numbers
  3.    Different masses and different atomic numbers
  4.    Different chemical properties and same atomic numbers
 Discuss Question
Answer: Option B. -> Same chemical properties but different atomic numbers
Question 57. Boiling water reactor uses the following as moderator, coolant and working fluid
  1.    Ordinary fluid
  2.    Heavy water
  3.    Molten lead
  4.    Hydrogen gas
 Discuss Question
Answer: Option A. -> Ordinary fluid
Question 58. Gas cooled reactor uses following materials as moderator, and coolant
  1.    Graphite, CO2
  2.    Graphite, air
  3.    Heavy water, CO2
  4.    Lead, H2
 Discuss Question
Answer: Option A. -> Graphite, CO2
Question 59. Amongst the following, the fissionable materials are
  1.    U₂₃₃ and Pu₂₂₉
  2.    U₂₃₁ and Pu₂₃₃
  3.    U₂₃₅ and Pu₂₃₅
  4.    U₂₃₈ and Pu₂₃₉
 Discuss Question
Answer: Option A. -> U₂₃₃ and Pu₂₂₉
Question 60. The control rods in the control system of nuclear reactors are used to
  1.    Absorb excess neutrons
  2.    Control fuel consumption
  3.    Control temperature
  4.    All of these
 Discuss Question
Answer: Option A. -> Absorb excess neutrons

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