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Total Questions : 807 | Page 80 of 81 pages
Question 791. 3. U238 will undergo fission by
  1.    In a heterogeneous or solid-fuel reactor, the fuel is mixed in a regular pattern within moderator.
  2.    (a) high energy (fast) neutrons alone
  3.    (b) low energy (slow) neutrons alone
  4.    (c) either fast or slow neutrons
 Discuss Question
Answer: Option A. -> In a heterogeneous or solid-fuel reactor, the fuel is mixed in a regular pattern within moderator.
Question 792. 5. Natural uranium is made up of
  1.    99.282% U238, 0.712% U235, 0.006% u234
  2.    99.282% U235, 0.712% U238, 0.06% u234
  3.    99.282% U234, 0.712% U238, 0.006% U235
  4.    99.282% U235, 0.712% U234, 0.006% U238
 Discuss Question
Answer: Option A. -> 99.282% U238, 0.712% U235, 0.006% u234
Question 793. 4. A reactor capable of converting a ferrite material into fissile isotopes is called
  1.    Regenerative reactor
  2.    Fast breeder reactor
  3.    Breeder reactor
  4.    Boiling water reactor
 Discuss Question
Answer: Option A. -> Regenerative reactor
Question 794. 6. Plutonium is produced
  1.    As basic raw material
  2.    By neutron irradiation of U238
  3.    By neutron irradiation of throium
  4.    Artificially
 Discuss Question
Answer: Option B. -> By neutron irradiation of U238
Question 795. 0. Reactors for propulsion applications use
  1.    Natural uranium
  2.    Molten lead
  3.    Any form of uranium
  4.    Thorium
 Discuss Question
Answer: Option B. -> Molten lead
Question 796. 7. Electron-volt is the unit of
  1.    Atomic power
  2.    Energy
  3.    Voltage
  4.    Radio activity
 Discuss Question
Answer: Option B. -> Energy
Question 797. 8. A pressurised water reactor employs pressuriser for the following application
  1.    To maintain constant pressure in primary circuit under varying load
  2.    To supply high pressure steam
  3.    To increase pressure of water in primary circut
  4.    To provide subcooled water at high pressure
 Discuss Question
Answer: Option A. -> To maintain constant pressure in primary circuit under varying load
Question 798. 9. Which of the following can be used as a coolant in nuclear plant
  1.    Light or heavy water
  2.    Molten lead
  3.    Carbon dioxide
  4.    Freon
 Discuss Question
Answer: Option A. -> Light or heavy water
Question 799. 1. The function of control rods in nuclear plants is to
  1.    Control temperature
  2.    Control readioactive pollution
  3.    Control absorption of neutron
  4.    Control fuel consumption
 Discuss Question
Answer: Option C. -> Control absorption of neutron
Question 800. 2. Breeder reactors employ liquid metal coolant because it
  1.    Acts as good moderator
  2.    Produces maximum steam
  3.    Transfers heat from core at a fast rate
  4.    Breeds neutrons
 Discuss Question
Answer: Option C. -> Transfers heat from core at a fast rate

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