A nuclear fission is initiated when the critical energy as compared to neutron binding energy of the atoms is_________________?

Related Mcqs:

1. In nuclear fission each neutron that causes fission releases_______________?

   A. no new neutron
   B. at least one new neutron
   C. one new neutron
   D. more than one new neutrons
   E. many-fold neutrons

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

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

3. The energy required to be applied to a radioactive nucleus for the emission of a neutron is________________?

   A. 1 MeV
   B. 2.4 MeV
   C. 4.3 MeV
   D. 7.8 MeV
   E. 20 MeV

4. The total energy released in fission of U is__________________?

   A. 5 MeV
   B. 10 MeV
   C. 199 MeV
   D. 168 MeV
   E. 11 MeV

5. In a fission process, maximum %age of energy is released as___________________?

   A. kinetic energy of neutrons
   B. kinetic energy of fission products
   C. instantaneous release of gamma rays
   D. gradual readioactive decay of fission products
   E. none of the above

6. A nuclear unit becoming critical means_______________?

   A. it is generating power to rated capacity
   B. it is capable of generating much more than rated capacity
   C. there is danger of nuclear spread
   D. chain reaction that causes automatic splitting of the fuel nuclei has been established
   E. it generates no heat

7. 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

8. Ideally the neutron flux in reactor should be__________________ ?

   A. maximum in center and zero at side
   B. maximum at side and zero in center
   C. uniform throughout
   D. zero throughout
   E. none of the above

9. The efficiency of a nuclear power plant in comparison to conventional and nuclear consideration is__________________?

   A. higher cost of nuclear fuel
   B. high initial cost
   C. high heat rejection in condenser
   D. lower temperature and pressure condi-tions
   E. nuclear hazard risk

10. The most practical fuel for a thermo-nuclear reactor, both from econocical and nuclear consideration is____________________?

    A. plutonium
    B. uranium
    C. deuterium
    D. thorium
    E. lithium