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Total Questions : 807 | Page 74 of 81 pages
Question 731. 3. Solid fuel for nuclear reactions may be fabricated into various small shapes such as
  1.    Plates
  2.    Pallets
  3.    Pins
  4.    Any one of the above
 Discuss Question
Answer: Option D. -> Any one of the above
Question 732. 6. In triggering fission, the following types of neutrons are desirable
  1.    Fast moving
  2.    Slow moving
  3.    Critical neutrons
  4.    Neutrons at rest
 Discuss Question
Answer: Option B. -> Slow moving
Question 733. 5. A fission chain reaction in uranium can be developed by
  1.    Slowing down fast neutrons so that U235 fission continues by slow motion neutrons
  2.    Accelerating fast neutrons
  3.    Absorbing all neutrons
  4.    Using moderator
 Discuss Question
Answer: Option A. -> Slowing down fast neutrons so that U235 fission continues by slow motion neutrons
Question 734. 4. Which of the following is more appropriate for a moderator. One which
  1.    Does not absorb neutrons
  2.    Absorbs neutrons
  3.    Accelerates neutrons
  4.    Eats up neutrons
 Discuss Question
Answer: Option A. -> Does not absorb neutrons
Question 735. 9. The following present serious difficulty in designing reactor shield
  1.    Alpha particles
  2.    Beta particles
  3.    Thermal neutrons
  4.    Fast neutrons and gamma rays
 Discuss Question
Answer: Option D. -> Fast neutrons and gamma rays
Question 736. 8. In a fission process, maximum %age of energy is released as
  1.    Kinetic energy of neutrons
  2.    Kinetic energy of fission products
  3.    Instantaneous release of gamma rays
  4.    Gradual readioactive decay of fission products
 Discuss Question
Answer: Option B. -> Kinetic energy of fission products
Question 737. 7. 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 738. 0. In nuclear fission
  1.    The original elements change into completely different elements
  2.    The electrons of the element change
  3.    The molecules rearrange themselves to form other molecules (e) none of the above.
  4.    (c) 2 neutrons
 Discuss Question
Answer: Option A. -> The original elements change into completely different elements
Question 739. 1. A fast breeder reactor uses following as fuel
  1.    Enriched uranium
  2.    Plutonium
  3.    Thorium
  4.    U238
 Discuss Question
Answer: Option D. -> U238
Question 740. 2. A boiling water reactor uses following as fuel
  1.    Enriched uranium
  2.    Plutonium
  3.    Thorium
  4.    U238
 Discuss Question
Answer: Option A. -> Enriched uranium

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