1. The largest stable nucleus is
U-235
U-238
Pb-206
Bi-209
✅ The correct answer is option A.
Nuclear Power Engineering MCQs
2. A fast breeder reactor
utilises fast neutrons for causing fission.
converts fertile material (e.g., U-238) into fissile material (Pu-239).
normally employs molten sodium as coolant.
all (a), (b) and (c).
✅ The correct answer is option D.
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?
159
1837
2537
10000
✅ The correct answer is option B.
5. The velocity of thermal (slow) neutrons triggering nuclear fission reaction (having energy equal to 0.025 eV) is about __________ metres/second.
1100
2200
3300
4400
✅ The correct answer is option B.
6. Radioactive decay is a __________ change.
chemical
nuclear
physical
none of these
✅ The correct answer is option B.
7. The new nucleus formed after β-decay of a radioactive element has
less atomic number
less atomic weight
more atomic number
more atomic weight
✅ The correct answer is option A.
8. The size of an atom is of the order of one
°Angstrom
fermi
micron
mm
✅ The correct answer is option A.
9. The amount of a radioactive material (having a half life of 100 years) remaining after 400 years will be __________ of its original weight.
1-Feb
1-Apr
1-Aug
Jan-16
✅ The correct answer is option D.
10. Fission of U-235 on slow neutron bombardment can be represented by
92U235 + 3 γ1 56Ba143 + 36Kr90
92U235 + 0n1 56Ba143 + 36Kr90 + 3 0n1
92U235 + 0n1 56Ba143 + 36Kr90 + 3 0n1 + Q (energy)
92U235 + 0n1 92U236 + 30n1+ Q (energy)
✅ The correct answer is option C.