Nuclear Power Engineering and Thermal Physics MCQ - Set 03 - ObjectiveBooks

Nuclear Power Engineering and Thermal Physics MCQ - Set 03

Practice Test: Question Set - 03

1. Liquid metal (e.g., molten sodium) is preferred as a coolant in case of a/an __________ reactor.
    (A) Homogeneous
    (B) Graphite moderated
    (C) Fast breeder
    (D) Enriched uranium (3% U-235) fuelled

2. Plutonium
    (A) Is recovered from spent fuel from thermal nuclear reactor
    (B) Has much lower melting point (640°C ) compared to thorium (1690°C)
    (C) Both (a) and (b)
    (D) Neither (a) nor (b)

3. Unit of radioactivity is
    (A) Barn
    (B) Fermi
    (C) Angstrom
    (D) Curie

4. Which of the following ores contains maximum percentage of uranium?
    (A) Carnotite
    (B) Thorium
    (C) Rescolite
    (D) Pitchblende

5. Out of the following places, a nuclear power plant is not located at
    (A) Talcher (Orissa)
    (B) Kaiga (Karnataka)
    (C) Rawatbhata (Rajasthan)
    (D) Kalpakkam (Tamilnadu)

6. In nuclear reactions, __________ number is conserved.
    (A) Mass
    (B) Atomic
    (C) Both (a) & (b)
    (D) Neither (a) nor (b)

7. Radioactive decay of a material involves a __________ order reaction.
    (A) Third
    (B) Second
    (C) First
    (D) Zero

8. The main purpose of control rod in a nuclear reactor is to control the
    (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

9. Thermal neutrons which are used to cause the fission of U-235 have energy __________ eV.
    (A) < 0.025
    (B) > 1
    (C) 1-25
    (D) > 200

10. The decrease in the atomic number is not observed in case of
    (A) Electron capture
    (B) β-emission
    (C) α-emission
    (D) Positron emission

11. Net efficiency of ordinary light water cooled nuclear reactor is about __________ percent.
    (A) 32
    (B) 52
    (C) 72
    (D) 88

12. Number of secondary neutron emitted on fission of an atom of U-235 by slow neutron bombardment is
    (A) 3
    (B) 235
    (C) 200
    (D) 92

13. Bhabha Atomic Research Centre (BARC) located at Trombay (near Bombay, INDIA) has
    (A) Five operating research reactors (namely Apsara, Cirus Zerelina, Purnima and Dhurva)
    (B) A 420 MW nuclear power plant
    (C) A very large capacity (100 tons/yr) heavy water plant
    (D) All (a), (b) and (c)

14. Thorium can be converted into U-233 in a __________ reactor.
    (A) Liquid metal cooled
    (B) Fast breeder
    (C) Thermal
    (D) Swimming pool

15. Which of the following may not need a moderator?
    (A) Candu reactor
    (B) Fast breeder reactor
    (C) Homogeneous reactor
    (D) Pressurized water reactor

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