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Total Questions : 807 | Page 75 of 81 pages
Question 741. 5. A fast breeder reactor uses
  1.    90% U-235
  2.    U-238
  3.    U-235
  4.    Pu-239
 Discuss Question
Answer: Option A. -> 90% U-235
Question 742. 4. Artificial radioactive isotopes find application in
  1.    Power generation
  2.    Medical field.
  3.    Nuclear fission
  4.    Nuclear fusion
 Discuss Question
Answer: Option B. -> Medical field.
Question 743. 3. A fast breeder reactor
  1.    Uses graphite rods as moderator
  2.    Has powerful moderator
  3.    Has no moderator
  4.    Uses ferrite material as moderator
 Discuss Question
Answer: Option C. -> Has no moderator
Question 744. 6. Half life of a radioactive isotope corresponds to the time required for half of the following to decay
  1.    Electrons
  2.    Atom.
  3.    Neutrons
  4.    Nulceus
 Discuss Question
Answer: Option B. -> Atom.
Question 745. 7. In order to have constant clain reaction to produce a constant rate of heat output, the value of ratio of the number of neutrons in one generation to the number of neutrons in the immediately preceding generation must be
  1.    Greater than 1.0
  2.    Less than 1 0
  3.    Equal to zero
  4.    (c) equal to 1.0
 Discuss Question
Answer: Option D. -> (c) equal to 1.0
Question 746. 1. The most practical fuel for a thermo-nuclear reactor, both from econocical and nuclear consideration is
  1.    Plutonium
  2.    Uranium
  3.    Deuterium
  4.    Thorium
 Discuss Question
Answer: Option C. -> Deuterium
Question 747. 0. In boiling water reactor, moderator is
  1.    Coolant itself
  2.    Ferrite rod
  3.    Graphite rod
  4.    Liquid sodium metal
 Discuss Question
Answer: Option A. -> Coolant itself
Question 748. 9. The coolant used in boiling water reactor is
  1.    CO2
  2.    (c) mixture of water and steam
  3.    (d) liquid metal
  4.    (e) mercury.
 Discuss Question
Answer: Option C. -> (d) liquid metal
Question 749. 8. Pressurised water reactor is-designed
  1.    For boiling 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 750. 2. The efficiency of a nuclear power plant in comparison to conventional and nuclear consideration is
  1.    Higher cost of nuclear fuel
  2.    High initial cost
  3.    High heat rejection in condenser
  4.    Lower temperature and pressure conditions
 Discuss Question
Answer: Option D. -> Lower temperature and pressure conditions

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