Related Mcqs:

1. 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

2. 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

3. 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

4. Which of the following nuclear reactors is the most efficient thermodynamically while operating between the same temperature and pressure limits of the reactor ?

   A. Molten sodium cooled
   B. CO2 gas cooled
   C. Pressurised water
   D. Boiling water

5. 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

6. Pressure in a Pressurised Water Reactor (PWR) is used for ____________________?

   A. Maintaining constant pressure in the primary cooling circuit under varying loads
   B. Superheating the steam
   C. Pressurising the water in the primary coolant circuit
   D. None of these

7. Thermal nuclear reactors using enriched uranium as fuel contains a maximum of ____________ percent fissile material i.e. U-235?

   A. 1
   B. 2
   C. 3
   D. 7

8. ____________ moderator is used in a fast breeder reactor?

   A. Graphite
   B. Heavy water
   C. Beryllium
   D. No

9. ____________ nuclear reactor does not require a heat exchanger to supply steam to power turbine?

   A. Molten sodium cooled
   B. Helium cooled
   C. Boiling water
   D. Pressurised water

10. If 4 gm of a radioisotope has a half life period of 10 days, the half life of 2 gm of the same isotope will be ____________ days?

    A. 5
    B. 10
    C. 20
    D. 30