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MCQs

Total Questions : 807 | Page 76 of 81 pages
Question 751. 3. The presence of reflector in nuclear power plants results in
  1.    Increased production of neutrons
  2.    Complete absorption of neutrons
  3.    Controlled production of neutrons
  4.    Decreased leakage of neutrons
 Discuss Question
Answer: Option D. -> Decreased leakage of neutrons
Question 752. 4. The fuel needed, with reflector in nuclear power plant, in order to generate sufficient neutrons to sustain a chain reaction, would be
  1.    More
  2.    Less
  3.    Same
  4.    Zero
 Discuss Question
Answer: Option B. -> Less
Question 753. 6. 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 754. 5. The efficiency of a nuclear power plant in comparsion to a conventional thermal power plant is
  1.    Same
  2.    More
  3.    Less
  4.    May be less or more depending on size
 Discuss Question
Answer: Option C. -> Less
Question 755. 8. The mass number of a substance represents the sum of total number of
  1.    Protons and neutrons in an atom
  2.    Protons and electrons in an atom
  3.    Neutrons and electrons in an atom
  4.    Protons and neutrons in a nucleus
 Discuss Question
Answer: Option D. -> Protons and neutrons in a nucleus
Question 756. 7. Atomic number of an element in the periodic table represents the numbers of
  1.    Protons in the nucleus
  2.    Electrons in the nucleus
  3.    Neutrons in the nucleus
  4.    Electrons in the atom
 Discuss Question
Answer: Option A. -> Protons in the nucleus
Question 757. 0. Moderator in nuclear plants is used to
  1.    Reduce temperature
  2.    Extract heat from nuclear reaction
  3.    Control the reaction
  4.    Cause collision with the fast moving neutrons to reduce their speed
 Discuss Question
Answer: Option D. -> Cause collision with the fast moving neutrons to reduce their speed
Question 758. 9. A nuclear unit becoming critical means
  1.    It is generating power to rated capacity
  2.    It is capable of generating much more than rated capacity
  3.    There is danger of nuclear spread
  4.    Chain reaction that causes automatic splitting of the fuel nuclei has been established
 Discuss Question
Answer: Option D. -> Chain reaction that causes automatic splitting of the fuel nuclei has been established
Question 759. 1. The most commonly used moderator in nuclear plants is
  1.    Heavy water
  2.    Graphite.
  3.    Graphite and concrete
  4.    Deutrium
 Discuss Question
Answer: Option B. -> Graphite.
Question 760. 4. Breeder reactor has a conversion ratio of
  1.    Unity
  2.    More than unity
  3.    Less than unity
  4.    Zero
 Discuss Question
Answer: Option B. -> More than unity

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