Amongst the following, the fissionable materials are________________?

Related Mcqs:

1. Enriched uranium may contain fissionable contents of the order of__________________?

   A. 1-99%
   B. 1-25%
   C. 1-50%
   D. 1-75%
   E. 1-90%.

2. In the breeder reactors the generation of new fissionable atom is_________________?

   A. at the lower rate than the consumption
   B. at a higher rate than the constuption
   C. at an equal rate of the consumption
   D. depends on other considerations
   E. unpredictable

3. Gas cooled reactor uses following materials as moderator, and coolant____________________?

   A. graphite, C02
   B. graphite, air
   C. heavy water, C02
   D. lead, H2
   E. concrete, N2

4. Effective moderators are those materials which contain____________________?

   A. light weight atoms
   B. heavy weight atoms
   C. critical atoms
   D. zero weight atoms
   E. there is no such criterion

5. A nuclear fission produces energy of following order in MeV___________________?

   A. 20
   B. 200
   C. 2000
   D. 20,000
   E. 2 x 105

6. Which of the following particles is the lightest__________________?

   A. nucleus
   B. electron
   C. proton
   D. meson
   E. neutron

7. The nuclear power plant at Tarapur has the following reactor________________?

   A. fast breeder
   B. pressurised water
   C. boiling water
   D. sodium graphite
   E. none of the above

8. Which of the following can be used as a coolant in nuclear plant________________?

   A. light or heavy water
   B. molten lead
   C. carbon dioxide
   D. freon
   E. carbon tetrachloride

9. The following present serious difficulty in designing reactor shield_________________?

   A. alpha particles
   B. beta particles
   C. thermal neutrons
   D. fast neutrons and gamma rays
   E. none of the above

10. A fast breeder reactor uses following as fuel_________________?

    A. enriched uranium
    B. plutonium
    C. thorium
    D. U235
    E. natrual uranium