Power plant mechanical engineering objective questions - Set 07

Practice Test: Question Set - 07


1. The fast breeder reactor uses the following moderator
    (A) Demineralised water
    (B) Carbon dioxide
    (C) Heavy water
    (D) No moderator is used

2. Boiling water reactor uses the following as moderator, coolant and working fluid
    (A) Ordinary fluid
    (B) Heavy water
    (C) Molten lead
    (D) Hydrogen gas

3. Ideally the neutron flux in reactor should be
    (A) Maximum in centre and zero at side
    (B) Maximum at side and zero in canter
    (C) Uniform throughout
    (D) Zero throughout

4. Enriched uranium may contain fissionable contents of the order of
    (A) 1-99%
    (B) 1-25%
    (C) 1-50%
    (D) 1-75%

5. U235 will undergo fission by
    (A) High energy (fast) neutrons alone
    (B) Low energy (slow) neutrons alone
    (C) Either fast or slow neutrons
    (D) Medium energy neutrons

6. U238 will undergo fission by
    (A) High energy (fast) neutrons alone
    (B) Low energy (slow) neutrons alone
    (C) Either fast or slow neutrons
    (D) Medium energy neutrons

7. A reactor capable of converting a ferrite material into fissile isotopes is called
    (A) Regenerative reactor
    (B) Fast breeder reactor
    (C) Breeder reactor
    (D) Boiling water reactor

8. Hydrogen is preferred as better coolant in comparison to CO₂ because former
    (A) Is lighter
    (B) Is inert
    (C) Has high specific heat
    (D) Is a good conductor

9. The risk of radioactive hazard is greatest in the turbine with following reactor
    (A) Pressurised water
    (B) Boiling water
    (C) Gas cooled
    (D) Liquid metal cooled

10. Plutonium is produced
    (A) As basic raw material
    (B) By neutron irradiation of Uz
    (C) By neutron irradiation of thorium
    (D) Artificially

11. The unit of radioactivity is
    (A) Electron volt
    (B) Electron ampere
    (C) Curie
    (D) MV

12. U233 is produced
    (A) As basic raw material
    (B) By neutron irradiation of Uz
    (C) By neutron irradiation of thorium
    (D) Artificially

13. Plutonium (Pu239) is produced
    (A) Artificially
    (B) When U238 is irradiated by neutrons
    (C) By fission of Th232
    (D) As basic raw material

14. Which of the following is the primary fuel?
    (A) U₂₃₃
    (B) U
    (C) U₂₃₈
    (D) Pu

15. Which of the following can be used as a coolant in nuclear plant?
    (A) Light or heavy water
    (B) Molten lead
    (C) Carbon dioxide
    (D) Freon

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Power Plant Engineering:
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