Heavy water has maximum density at ______________ °C ?

Related Mcqs:

1. 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.

2. Percentage of heavy water in ordinary water is around__________________?

   A. 0.015
   B. 7.54
   C. 0.71
   D. 32.97

3. Percentage of the heavy water in ordinary water is around ____________________?

   A. 0.015
   B. 7.54
   C. 0.71
   D. 32.97

4. Heavy water used in the nuclear reactors to slow down the speed of neutrons is __________________?

   A. Highly purified water
   B. A compound of oxygen and deuterium
   C. Water having dissolved salts of heavy metals
   D. None of these

5. The molecular weight of heavy water is_________________?

   A. 10
   B. 18
   C. 20
   D. 36

6. Heavy water (D2O) in a nuclear reactor serves as a_______________?

   A. Coolant
   B. Moderator
   C. Both A. & B.
   D. Neutron absorber

7. Heavy water is used as a moderator in a _____________________?

   A. Pressurised water reactor (PWR)
   B. Boiling water reactor (BWR)
   C. Candu reactor
   D. Molten sodium cooled reactor

8. A pressurised water reactor (PWR) uses pressurised water as a___________________?

   A. Coolant
   B. Working fluid in power turbine
   C. Moderator
   D. None of these

9. Fast breeder nuclear reactors using enriched uranium as fuel may contain upto a maximum of ____________ percent of U-235 (i.e. fissile material)?

   A. 15
   B. 45
   C. 65
   D. 85

10. Which of the following accounts for the maximum energy release in the nuclear fission process ?

    A. Kinetic energy of fission products
    B. Radioactive decay of fission products
    C. Instantaneous release of γ-rays
    D. Kinetic energy of neutrons