In order to have constant clain reaction to produce a constant rate of heat output, the value of ratio of the number of neutrons in one generation to the number of neutrons in the immediately preceding generation must be________________?

Related Mcqs:

1. The fuel needed, with reflector in nuclear power plant, in order to generate sufficient neutrons to sustain a chain reaction, would be________________?

   A. more
   B. less
   C. same
   D. zero
   E. negative, i.e. fuel would be generated

2. Which of the following nuclear reactor does not need a heat exchanger for generation of steam____________________?

   A. gas cooled
   B. liquid metal cooled
   C. pressurised water
   D. boiling water
   E. none of the above

3. In triggering fission, which type of neutrons are more effective_________________?

   A. fast
   B. slow
   C. in bulk
   D. static
   E. activated

4. When a reactor becomes critical, then the production of neutrons is_________________?

   A. infinite
   B. zero
   C. exactly balanced by the loss of neutrons through leakage
   D. initiated
   E. stopped

5. In triggering fission, the following types of neutrons are desirable_________________?

   A. fast moving
   B. slow moving
   C. critical neutrons
   D. neutrons at rest
   E. none of the above

6. Each fission of U235 produces following number of fast neutrons per fission________________?

   A. 1 neutron
   B. 1 — neutrons
   C. 1 – 2 neutrons
   D. 2 — neutrons
   E. infinite

7. 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

8. One gram of uranium will produce energy equivalent to approximately____________________?

   A. 1 tonne of high grade coal
   B. 4.5 tonnes of high grade coal
   C. 10 tonnes of high grade coal
   D. 100 tonnes of high grade coal
   E. 1000 tonnes of high grade coal

9. A fission chain reaction in uranium can be developed by________________?

   A. slowing down fast neutrons so that Uz fission continues by slow motion neutrons
   B. accelerating fast neutrons
   C. absorbing all neutrons
   D. using moderator
   E. enriching U235

10. Breeder reactor has a conversion ratio of_____________________?

    A. unity
    B. more than unity
    C. less than unity
    D. zero
    E. infinity