Nuclear Power Engineering problems
- 1. The disintegration rate of a radioactive element
Options- A. progressively increases.
- B. progressively decreases.
- C. remains constant throughout.
- D. may increase or decrease depending on the material. Discuss
Correct Answer: progressively decreases.
- 2. What is the average life of a radioactive atom having a 'half life period' of T?
Options- A. 1.44 T
- B. 0.144 T
- C. 14.4 T
- D. 2T Discuss
Correct Answer: 1.44 T
- 3. "Critical mass" is the minimum mass of nuclear fissile material required for the
Options- A. sustainment of chain reaction.
- B. power generation on commercial scale.
- C. economic power generation.
- D. none of these. Discuss
Correct Answer: sustainment of chain reaction.
- 4. Heavy water is preferred over ordinary water as a coolant, because it.
Options- A. acts both as an efficient coolant as well as a moderator.
- B. can be heated to a higher temperature without pressurizing.
- C. is less prone to radiation damage.
- D. all (a), (b) and (c). Discuss
Correct Answer: all (a), (b) and (c).
- 5. Neutrons have mass approximately equal to that of __________ atoms.
Options- A. hydrogen
- B. helium
- C. deuterium
- D. none of these Discuss
Correct Answer: hydrogen
- 6. The main ore of thorium is
Options- A. pitchblende
- B. monazite sand
- C. limonite
- D. galena Discuss
Correct Answer: monazite sand
- 7. Function of control rod in a nuclear reactor is to control
Options- A. temperature
- B. pressure
- C. fuel consumption
- D. absorption of neutrons Discuss
Correct Answer: absorption of neutrons
- 8. The number of neutrons in the nucleus of Uranium-233 (92U233) is
Options- A. 141
- B. 92
- C. 233
- D. 325 Discuss
Correct Answer: 141
- 9. Commercial power generation from fusion reactor is not yet possible, because
Options- A. it is difficult to control nuclear fusion reaction.
- B. the fuel required (i.e., deuterium & tritium) is scarce.
- C. it is difficult to initiate fusion reaction.
- D. quantity of fuel required for initiating fusion reaction is prohibitively high. Discuss
Correct Answer: it is difficult to control nuclear fusion reaction.
- 10. Molten sodium is used as a coolant in a fast breeder reactor, because of its
Options- A. excellent moderating properties.
- B. neutron breeding capability.
- C. faster heat removal capability from the core.
- D. capability to increase the reaction rate in the core. Discuss
Correct Answer: faster heat removal capability from the core.
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