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- Question
Unit of radioactivity is
Options- A. barn
- B. fermi
- C. angstrom
- D. curie
- Correct Answer
- curie
- 1. Pick out the wrong statement.
Options- A. The ratio of the density of the 'nucleus' to that of the 'atom' is 1012 .
- B. ?-particle is identical with a doubly charged helium ion.
- C. The mass of deuterium atom is half that of helium atom.
- D. Gamma rays are high energy electrons. Discuss
- 2. Which of the following nuclear materials is fissile?
Options- A. Uranium-238
- B. Thorium-232
- C. Plutonium-239
- D. None of these Discuss
- 3. The first underground nuclear test was conducted by India at
Options- A. Jaisalmer
- B. Pokharan
- C. Kalpakkam
- D. Narora Discuss
- 4. Heavy water used in the nuclear reactors to slow down the speed of neutrons is
Options- A. highly purified water.
- B. a compound of oxygen and deuterium.
- C. water having dissolved salts of heavy metals.
- D. none of these. Discuss
- 5. Fast breeder reactors are most usable in India, because of our largest __________ deposits.
Options- A. thorium
- B. plutonium
- C. uranium
- D. none of these Discuss
- 6. Candu reactor is a __________ nuclcear reactor.
Options- A. natural uranium fuelled heavy water cooled & moderated
- B. highly enriched uranium (85% U-235) fuelled
- C. homogeneous
- D. fast breeder Discuss
- 7. The ratio of neutrons to protons of an element having a mass number and atomic number of 80 and 40 respectively is
Options- A. 1
- B. 0.5
- C. 2
- D. 4 Discuss
- 8. 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
- 9. 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
- 10. "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
Nuclear Power Engineering problems
Search Results
Correct Answer: Gamma rays are high energy electrons.
Correct Answer: Plutonium-239
Correct Answer: Pokharan
Correct Answer: a compound of oxygen and deuterium.
Correct Answer: thorium
Correct Answer: natural uranium fuelled heavy water cooled & moderated
Correct Answer: 1
Correct Answer: progressively decreases.
Correct Answer: 1.44 T
Correct Answer: sustainment of chain reaction.
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