- A. 1
- B. 2200
- C. 3 x 10¹¹
- D. 9 x 10²¹
Nuclear Power Engineering
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Velocity of the thermal neutron (< 0.025 eV) used for fission of U-235 is around ______ m/sec.
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An element having large number of ______ is most easily subjected to nuclear fission.
- A. Protons
- B. Electrons
- C. Neutrons
- D. Nucleons
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Which of the following is the most harmful for the human being?
- A. Β-rays
- B. X-rays
- C. Γ-rays
- D. Ultra violet rays
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Pressure in a Pressurised Water Reactor (PWR) is used for_____.
- A. Maintaining constant pressure in the primary cooling circuit under varying loads
- B. Superheating the steam
- C. Pressurising the water in the primary coolant circuit
- D. None of these
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The most commonly used nuclear fuel in boiling water reactor is_____.
- A. Enriched uranium
- B. Natural uranium
- C. Plutonium
- D. Monazite sand
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Which of the following gases has very high neutron capture cross-section, making it unsuitable as a coolant in nuclear reactor?
- A. N₂
- B. He
- C. CO₂
- D. H₂
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The sum of masses of two nuclei produced in nuclear fission compared to the mass of original nucleus is_____.
- A. Less
- B. More
- C. Same
- D. Much more
-
The half life period of a radioactive element depends upon the_____.
- A. Temperature
- B. Pressure
- C. Amount of element present
- D. None of these
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______ gas is normally not used as a coolant in a nuclear reactor, because of its high neutron capture cross-section.
- A. Nitrogen
- B. Hydrogen
- C. Helium
- D. Carbon dioxide
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The ratio of neutrons to protons of an element having a mass number and atomic number of 80 and 40 respectively is_____.
- A. 1
- B. 0.5
- C. 2
- D. 4