Coolant used in a boiling water reactor is________________?

Related Mcqs:

1. ‘Light water’ used as a coolant in nuclear reactor is nothing but______________________?

   A. Ordinary water
   B. Mildly acidic (pH = 6) water
   C. Mildly alkaline (pH = 8) water
   D. None of these

2. An ideal coolant for a nuclear reactor should ________________?

   A. Be a good absorber of neutrons
   B. Be capable of attaining high temperature, only when it is pressurised
   C. Have high density, but low heat transfer co-efficient
   D. Be free from radiation damage and non-corrosive

3. Liquid metal (e.g., molten sodium) is preferred as a coolant in case of a/an ______________ reactor?

   A. Homogeneous
   B. Graphite moderated
   C. Fast breeder
   D. Enriched uranium (3% U-235) fuelled

4. Use of molten metal as a coolant in fast breeder reactor helps in_________________?

   A. Rapid heat transfer from the core
   B. Accelerating the reaction rate in the core
   C. Breeding neutrons
   D. Accelerating the neutrons

5. Which is used as a coolant in nuclear reactor due to its high capture cross-section ?

   A. H2
   B. N2
   C. He
   D. CO2

6. Coolant used in a fast breeder reactor is____________________?

   A. Molten sodium
   B. Heavy water
   C. Ordinary water
   D. Helium

7. Pressure of CO2 gas (which is a coolant) in the Calder-Hall nuclear reactor is ______________ kgf/cm2?

   A. 0.2
   B. 7
   C. 35
   D. 50

8. Molten sodium is used as a coolant in a fast breeder reactor, because of its_________________?

   A. Excellent moderating properties
   B. Neutron breeding capability
   C. Faster heat removal capability from the core
   D. Capability to increase the reaction rate in the core

9. Molten sodium (as a coolant in fast breeder reactor) ?

   A. Can’t attain high temperature at normal pressure
   B. Is not at all corrosive, even at a higher temperature
   C. Is highly radioactive at elevated temperatures and can cause explosion, when it comes in
   contact with air or water
   D. None of these

10. Heavy water is preferred over ordinary water as a coolant, because it?

    A. Acts both as an efficient coolant as well as a moderator
    B. Can be heated to a higher temperature without pressurizing
    C. Is less prone to radiation damage
    D. All A., B. and C.