Reactors for propulsion applications use_________________?

Related Mcqs:

1. Reactors designed for propulsion applications are designed for_______________?

   A. natural uranium
   B. enriched uranium
   C. pure uranium
   D. any type of uranium
   E. none of the above

2. Breeder reactors employ liquid metal coolant because it_______________?

   A. acts as good moderator
   B. produces maximum steam
   C. transfers heat from core at a fast rate
   D. breeds neutrons
   E. increases rate of reaction in core

3. 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

4. Amongst the following, the fissionable materials are________________?

   A. U233andPu239
   B. U23iandPu233
   C. U235andPu235
   D. U238andPu239
   E. U243andPu235

5. 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

6. The commonly used material for shielding is__________________?

   A. lead or concrete
   B. lead and tin
   C. graphite or cadmium
   D. thick galvanised sheets
   E. black carbon papers

7. 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%.

8. For economical operation of a nuclear plant__________________?

   A. used fuel should be reprocessed
   B. moderator should be used
   C. coolant should be employed
   D. control rods should be used
   E. reflector should be used

9. The presence of reflector in nuclear power plants results in___________________?

   A. increased production of neutrons
   B. complete absorption of neutrons
   C. controlled production of neutrons
   D. decreased leakage of neutrons
   E. decrease of speed of neutrons

10. Which of the following type of pump is used in liquid metal cooled reactor for circulation of liquid metal_________________?

    A. centrifugal
    B. axial
    C. reciprocation
    D. electromagnetic
    E. diaphragm