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MCQs

Total Questions : 943 | Page 89 of 95 pages
Question 881. Which of the following types of nuclear reactors is most prone to radioactive hazards?
  1.    Boiling water reactor
  2.    Pressurised water reactor
  3.    Gas cooled reactor
  4.    Molten sodium cooled reactor
 Discuss Question
Answer: Option A. -> Boiling water reactor
Question 882. The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?
  1.    10000
  2.    159
  3.    1837
  4.    2537
 Discuss Question
Answer: Option C. -> 1837
Question 883. Positron is a/an
  1.    Helium nucleus
  2.    Nucleus with one proton and one neutron
  3.    Nucleus having two protons
  4.    Electron with positive charge
 Discuss Question
Answer: Option D. -> Electron with positive charge
Question 884. Plutonium
  1.    Both A & B
  2.    Has much lower melting point (640°C ) compared to thorium (1690°C)
  3.    Neither A nor B
  4.    Is recovered from spent fuel from thermal nuclear reactor
 Discuss Question
Answer: Option A. -> Both A & B
Question 885. Net efficiency of ordinary light water cooled nuclear reactor is about __________ percent.
  1.    88
  2.    52
  3.    72
  4.    32
 Discuss Question
Answer: Option D. -> 32
Question 886. Commercial power generation from fusion reactor is not yet possible, because
  1.    It is difficult to control fusion reaction
  2.    It is difficult to initiate fusion reaction
  3.    The fuel required (e.g. deuterium and tritium) is scarce
  4.    Quantity of fuel required for initiating fusion reaction is prohibitively high
 Discuss Question
Answer: Option A. -> It is difficult to control fusion reaction
Question 887. A pressurised water reactor (PWR) uses pressurised water as a
  1.    Coolant
  2.    Moderator
  3.    None of these
  4.    Working fluid in power turbine
 Discuss Question
Answer: Option A. -> Coolant
Question 888. The ratio of neutrons to protons of an element having a mass number and atomic number of 80 and 40 respectively is
  1.    1
  2.    0.5
  3.    2
  4.    4
 Discuss Question
Answer: Option A. -> 1
Question 889. Fast breeder reactors are most usable in India, because of our largest __________ deposits.
  1.    None of these
  2.    Plutonium
  3.    Thorium
  4.    Uranium
 Discuss Question
Answer: Option C. -> Thorium
Question 890. A moderator __________ the neutrons.
  1.    Absorbs
  2.    Accelerates
  3.    Slows down
  4.    Reflects
 Discuss Question
Answer: Option C. -> Slows down

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