Theory practice test on power plant engineering - Set 04

Practice Test: Question Set - 04

1. The function of control rods in nuclear plants is to
    (A) Control temperature
    (B) Control radioactive pollution
    (C) Control absorption of neutron
    (D) Control fuel consumption

2. Reflector in nuclear plants is used to
    (A) Return the neutrons back into the core
    (B) Shield the radioactivity completely
    (C) Check pollution
    (D) Conserve energy

3. A fission chain reaction in uranium can be developed
    (A) By increasing the contents of U₂₃₅
    (B) By slowing down fast neutrons so that U₂₃₅ fission continues by slow neutron
    (C) Both (A) and (B)
    (D) None of these

4. Pick up the wrong statement
    (A) In a heterogeneous or solid fuel reactor, the fuel is mixed in a regular pattern within moderator
    (B) Slow or thermal neutrons have energy of the order or 0.025 eV
    (C) Fast neutrons have energies above 1000 eV
    (D) Fast reactor uses moderator

5. Moderator in nuclear plants is used to
    (A) Reduce temperature
    (B) Extract heat from nuclear reaction
    (C) Control the reaction
    (D) Cause collision with the fast moving neutrons to reduce their speed

6. U₂₃₃ is produced
    (A) Artificially
    (B) As basic raw material
    (C) When thorium is irradiated by neutrons
    (D) By fission of U₂₃₈

7. Solid fuel for nuclear reactions may be fabricated into various small shapes such as
    (A) Plates
    (B) Pallets
    (C) Pins
    (D) Any one of the above

8. In fast breeder reactors
    (A) Any type of moderator can be used
    (B) Graphite is used as the moderator
    (C) Heavy water is used as the moderator
    (D) Moderator is dispensed with

9. Uranium has isotopes
    (A) U₂₃₄
    (B) U₂₃₅
    (C) U₂₃₈
    (D) All of these

10. Each fission of U₂₃₅ produces following number of fast neutrons per fission
    (A) 1 neutron
    (B) 3 neutrons
    (C) 1, 2 neutrons
    (D) 2 neutrons

11. Enriched uranium is one in which
    (A) Percentage of U₂₃₅ has been artificially increased
    (B) Percentage of U has been artificially increased
    (C) Percentage of U₂₃₄ has been artificially increased
    (D) Extra energy is pumped from outside

12. A fission chain reaction in uranium can be developed by
    (A) Slowing down fast neutrons so that Uz fission continues by slow motion neutrons
    (B) Accelerating fast neutrons
    (C) Absorbing all neutrons
    (D) Using moderator

13. The energy released during the fission of one atom of Uranium 235 in million electron volts is about
    (A) 100
    (B) 200
    (C) 300
    (D) 400

14. Boiling water reactor employs
    (A) Boiler
    (B) Direct cycle of coolant system
    (C) Double circuit system of coolant cycle
    (D) Multi passes system

15. The efficiency of a nuclear power plant in comparison to a conventional thermal power plant is
    (A) Same
    (B) More
    (C) Less
    (D) May be less or mote depending on size

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Power Plant Engineering:
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