Nuclear Power Engineering problems
- 1. The amount of a radioisotope remaining undecayed after a time equal to four times its half life, will be __________ percent.
Options- A. 3.125
- B. 6.25
- C. 12.50
- D. 25 Discuss
Correct Answer: 6.25
- 2. An electron has a mass that is approximately __________ that of the proton.
Options- A. 1836 (approximately)
- B. 1/1836 (approximately)
- C. 1
- D. ? Discuss
Correct Answer: 1/1836 (approximately)
Explanation:
An electron has a mass that is approximately 1/1836.15267245(75) that of the proton.
- 3. The time taken for a radioactive element to reduce to 50% of its original weight is __________ years, if its half life period is 12 years.
Options- A. 24
- B. 18
- C. 6
- D. 36 Discuss
Correct Answer: 18
- 4. Final product of uranium extraction plant at Jadugoda (Bihar) is
Options- A. uranium
- B. uranium oxide
- C. uranium carbide
- D. magnesium diuranate Discuss
Correct Answer: magnesium diuranate
- 5. Ordinary water is not used as a moderator because, it
Options- A. has a low absorption cross-section.
- B. has a low scattering cross-section.
- C. absorbs neutrons.
- D. does not absorb neutrons. Discuss
Correct Answer: absorbs neutrons.
- 6. A boiling water reactor is the one, in which the
Options- A. coolant water is allowed to boil in the core of the reactor.
- B. coolant water, after being heated in the reactor core, generates steam in a boiler.
- C. pressurised water is pumped into the core.
- D. fuel and the coolant are thoroughly mixed to form a homogeneous solution. Discuss
Correct Answer: coolant water is allowed to boil in the core of the reactor.
- 7. The largest stable nucleus is
Options- A. U-235
- B. U-238
- C. Pb-206
- D. Bi-209 Discuss
Correct Answer: U-235
- 8. Which is the most commonly used molten metal for cooling of nuclear reactors?
Options- A. Calcium
- B. Sodium
- C. Mercury
- D. Zinc Discuss
Correct Answer: Sodium
- 9. The decay product of tritium (a beta emitter) is
Options- A. lithium
- B. helium
- C. deuterium
- D. hydrogen Discuss
Correct Answer: helium
- 10. Which of the following may be used to measure the rate of nuclear disintegration?
Options- A. Geiger-Muller Counter
- B. Cyclotron
- C. Cold chamber
- D. Mass spectrograph Discuss
Correct Answer: Geiger-Muller Counter
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