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- Question
?-rays emission in radioactive disintegration is always accompanied by the emission of
Options- A. ?-rays
- B. ?-rays
- C. neutrons
- D. none of these
- Correct Answer
- ?-rays
- 1. 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
- 2. 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
- 3. Isotopes of an element have different
Options- A. mass number
- B. electronic configuration
- C. nuclear charge
- D. chemical properties Discuss
- 4. 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
- 5. Uranium percentage in monazite sand is about
Options- A. 0.01
- B. 0.25
- C. 1.2
- D. 7 Discuss
- 6. Atoms of U-238 and U-235 differ in structure by three
Options- A. electrons and three protons
- B. protons
- C. neutrons
- D. electrons Discuss
- 7. The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?
Options- A. 159
- B. 1837
- C. 2537
- D. 10000 Discuss
- 8. An element having large number of __________ is most easily subjected to nuclear fission.
Options- A. protons
- B. electrons
- C. neutrons
- D. nucleons Discuss
- 9. The main purpose of control rod in a nuclear reactor is to control the
Options- A. chain reaction and hence the power output by regulating the number of secondary neutrons causing fission.
- B. emission of hazardous radiation.
- C. conversion of fissile material into fertile material.
- D. velocity of the secondary neutrons. Discuss
- 10. Heavy water (D2O) in a nuclear reactor serves as a
Options- A. coolant
- B. moderator
- C. both (a) & (b)
- D. neutron absorber Discuss
Nuclear Power Engineering problems
Search Results
Correct Answer: U-239
Correct Answer: both (b) and (c).
Correct Answer: mass number
Correct Answer: Hydrogen has two isotopes.
Correct Answer: 0.25
Correct Answer: neutrons
Correct Answer: 1837
Correct Answer: nucleons
Correct Answer: chain reaction and hence the power output by regulating the number of secondary neutrons causing fission.
Correct Answer: both (a) & (b)
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