Related Mcqs:

1. “Critical mass” is the minimum mass of nuclear fissile material required for the__________________?

   A. Sustainment of chain reaction
   B. Power generation on commercial scale
   C. Economic power generation
   D. None of these

2. “Critical mass” is the minimum mass of nuclear fissile material required for the_______________________?

   A. Sustainment of chain reaction
   B. Power generation on commercial scale
   C. Economic power generation
   D. None of these

3. Quantity of fissionable material (i.e. U-235) in natural uranium is _____________ percent?

   A. 0.71
   B. 6.31
   C. 99.29
   D. 12.73

4. The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?

   A. 159
   B. 1837
   C. 2537
   D. 10000

5. Thorium-232 (a fertile material) on absorption of a neutron gets converted into ___________ , which is a fissile material?

   A. Thorium-233
   B. Uranium-235
   C. Uranium-233
   D. Plutonium-239

6. The half life period of a radioactive element is 100 days. After 400 days, one gm of the element will be reduced to ______________ gm?

   A. 1/4
   B. 1/8
   C. 1/2
   D. 1/16

7. Critical energy should be _______________ the neutron binding energy of the atom in order to initiate a nuclear fission?

   A. Equal to
   B. Less than
   C. More than
   D. Either more or less

8. Neutrons have mass approximately equal to that of _____________ atoms?

   A. Hydrogen
   B. Helium
   C. Deuterium
   D. None of these

9. The sum of masses of two nuclei produced in nuclear fission compared to the mass of original nucleus is_____________________?

   A. Less
   B. More
   C. Same
   D. Much more

10. Energy equivalent to one atomic mass unit (amu) is ______________ MeV?

    A. 9.31
    B. 93.1
    C. 931
    D. 9310