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MCQs

Total Questions : 943 | Page 2 of 95 pages
Question 11. Hydrogen bomb employs the nuclear fusion of
  1.    Hydrogen
  2.    Deuterium
  3.    Tritium
  4.    Helium
 Discuss Question
Answer: Option B. -> Deuterium
Question 12. Use of molten metal as a coolant in fast breeder reactor helps in
  1.    Rapid heat transfer from the core
  2.    Accelerating the reaction rate in the core
  3.    Breeding neutrons
  4.    Accelerating the neutrons
 Discuss Question
Answer: Option A. -> Rapid heat transfer from the core
Question 13. Fuel for a fast breeder reactor is
  1.    Plutonium
  2.    Uranium
  3.    Radium
  4.    Neptunium
 Discuss Question
Answer: Option A. -> Plutonium
Question 14. The time taken for a radioactive element to reduce to 50% of its original weight is __________ years, if its half life period is 12 years.
  1.    24
  2.    18
  3.    6
  4.    36
 Discuss Question
Answer: Option B. -> 18
Question 15. Uranium is recovered from its ore (pitchblende) by
  1.    Froth floatation technique
  2.    Leaching with sulphuric acid
  3.    Smelting in a furnace
  4.    Dissolving in water
 Discuss Question
Answer: Option B. -> Leaching with sulphuric acid
Question 16. Which of the following is the most harmful for the human being?
  1.    Β-rays
  2.    X-rays
  3.    Γ-rays
  4.    Ultra violet rays
 Discuss Question
Answer: Option C. -> Γ-rays
Question 17. Coolant used in a boiling water reactor is
  1.    Hydrogen gas
  2.    Water
  3.    Steam
  4.    A mixture of water & steam
 Discuss Question
Answer: Option D. -> A mixture of water & steam
Question 18. The atomic weight and atomic number of an element are A and Z respectively. What is the number of neutrons in the atom of that element?
  1.    A+Z
  2.    A- Z
  3.    A
  4.    Z
 Discuss Question
Answer: Option B. -> A- Z
Question 19. Graphite is used in nuclear reactor as
  1.    Insulation lining of the reactor
  2.    Fuel
  3.    Lubricant
  4.    Retarder of neutron velocity
 Discuss Question
Answer: Option D. -> Retarder of neutron velocity
Question 20. Extraction of uranium from its ore is done by __________ method.
  1.    Chemical
  2.    Pyrometallurgical
  3.    Physical beneficiation
  4.    Electrometallurgical
 Discuss Question
Answer: Option A. -> Chemical

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