This set of Power Plant Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Chain Reaction and Nuclear Reactors”.
1. The atomic weight and atomic number of an element are A and Z respectively. What is the number of neutrons in the atom of that element?
Explanation: Number of neutrons = Atomic weight – Atomic number.
2. The time required for half of the __________ of a radioactive isotope to decay is called its half-life.
Explanation: The time required for half of the nuclei of a radioactive isotope to decay is called its half life.
3. Thermal nuclear reactors using enriched uranium as fuel contains a maximum of __________ percent fissile material i.e. U-235.
Explanation: Thermal nuclear reactors using enriched uranium as fuel contains a maximum of 6 percent fissile material i.e. U-235.
4. __________ moderator is used in a fast breeder reactor.
a) Heavy water
Explanation: A fast breeder reactor doesn’t employ any moderator.
5. Nuclides having the same atomic number are termed as?
Explanation: Isomers are nuclides having the same atomic number.
6. Main source of __________ is monazite sand
Explanation: Thorium is the main source of Monazite Sand.
7. Emission of β-particles during radioactive decay of a substance is from
b) innermost shell
c) outermost shell
d) none of the mentioned
Explanation: Emission of β-particles during radioactive decay of a substance is from the nucleus as all emissions are nuclear phenomenon.
8. A fertile material is the one, which can be
a) converted into fissile material on absorption of neutron
b) fissioned by either slow or fast neutrons
c) fissioned by slow (thermal) neutrons
d) fissioned by fast neutrons
Explanation: A fertile material is the one, which can be converted into fissile material on absorption of neutron.
9. The half-life period of a radioactive element depends on its
d) none of the mentioned
Explanation: The half-life is independent of the mentioned factors.
10. Which is radioactive in nature?
d) Heavy Hydrogen
Explanation: Tritium is a radioactive element.
11. The most commonly used nuclear fuel in boiling water reactor is
a) enriched uranium
c) natural uranium
d) monazite sand
Explanation: Enriched uranium is the most commonly used nuclear fuel in boiling water reactor.
12. Enrichment of uranium is done to increase the concentration of __________ in the natural uranium
Explanation: Enrichment of uranium is done to increase the concentration of U-235 in the natural uranium.
13. Fuel for a nuclear reactor (thermal) is
d) None of the mentioned
Explanation: Uranium is the fuel for a thermal reactor.
14. The first underground nuclear test was conducted by India at
Explanation: Pokhran had the very first underground nuclear test.
Sanfoundry Global Education & Learning Series – Power Plant Engineering.
To practice all areas of Power Plant Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers.