Nuclear Power Engineering problems
- 1. Which of the following is not used as a moderator in nuclear reactor?
Options- A. Molten sodium
- B. Light water
- C. Beryllium
- D. Boron hydride Discuss
Correct Answer: Molten sodium
- 2. Radioactive decay of a material involves a __________ order reaction.
Options- A. third
- B. second
- C. first
- D. zero Discuss
Correct Answer: first
- 3. The critical mass of a fissionable material can be reduced by
Options- A. heating it.
- B. cooling it.
- C. surrounding it by neutron reflecting material.
- D. surrounding it by neutron absorbing material. Discuss
Correct Answer: surrounding it by neutron reflecting material.
- 4. In the gaseous diffusion process of uranium enrichment, the natural uranium is converted into gaseous
Options- A. uranium oxide
- B. uranium hexaflouride
- C. uranium carbide
- D. uranium sulphate Discuss
Correct Answer: uranium hexaflouride
- 5. Uranium percentage in monazite sand is about
Options- A. 0.01
- B. 0.25
- C. 1.2
- D. 7 Discuss
Correct Answer: 0.25
- 6. Pick out the wrong statement.
Options- A. Isotopes have the same number of protons & electrons, but different number of neutrons.
- B. Hydrogen has two isotopes.
- C. In ordinary hydrogen, 1H1 and 1H2 are present in the ratio 6400:1.
- D. none of these. Discuss
Correct Answer: Hydrogen has two isotopes.
- 7. Isotopes of an element have different
Options- A. mass number
- B. electronic configuration
- C. nuclear charge
- D. chemical properties Discuss
Correct Answer: mass number
- 8. A control rod
Options- A. should have small absorption cross-section.
- B. is generally made of boron, hafnium or cadmium.
- C. should have large absorption cross-section.
- D. both (b) and (c). Discuss
Correct Answer: both (b) and (c).
- 9. Out of the following, nucleus of __________ atom contains the largest number of neutrons.
Options- A. U-235
- B. U-238
- C. U-239
- D. Pu-239 Discuss
Correct Answer: U-239
- 10. ?-rays emission in radioactive disintegration is always accompanied by the emission of
Options- A. ?-rays
- B. ?-rays
- C. neutrons
- D. none of these Discuss
Correct Answer: ?-rays
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