Nuclear Power Engineering Objective questions & answers - ObjectiveBooks

Nuclear Power Engineering Objective questions & answers

Practice Test: Question Set - 16

1. Extraction of uranium from its ore is done using __________ methods.

    (A) Electrometallurgical
    (B) Pyrometallurgical
    (C) Chemical
    (D) Physical beneficiation

2. Which of the following is a moderating material used in nuclear reactor?

    (A) Graphite
    (B) Cadmium
    (C) Zircaloy (an alloy of zirconium and aluminium)
    (D) Stainless steel

3. Pick out the correct statement.

    (A) Positron is the antiparticle of electron
    (B) In α-decay, the ratio of neutron to proton decreases
    (C) Ionizing power of β-rays is higher than that of α-rays
    (D) Speed of α-rays is more than that of γ-rays

4. Uranium percentage in monazite sand is about

    (A) 0.01
    (B) 0.25
    (C) 1.2
    (D) 7

5. Percentage of natural uranium present in uranium ore found in Jadugoda (Jharkhand, India) is

    (A) 0.1
    (B) 1
    (C) 2
    (D) 12

6. Fast breeder reactors do not

    (A) Use Th-232 as fissile fuel
    (B) Convert fertile material to fissile material
    (C) Use fast neutrons for fission
    (D) Use molten sodium as coolant

7. Pick out the correct statement.

    (A) Loss of electrons from neutral atoms produces negative ions
    (B) The radius of nucleus & atomic size are of the order of 10-12 cm & 10-8 cm respectively
    (C) Gain of electrons by neutral atoms form cations
    (D) Proton to neutron ratio in a stable nucleus is 2 : 1

8. Fuel for a fast breeder reactor is

    (A) Plutonium
    (B) Uranium
    (C) Radium
    (D) Neptunium

9. The main ore of thorium is

    (A) Pitchblende
    (B) Monazite sand
    (C) Limonite
    (D) Galena

10. MeV is the unit of

    (A) Radioactivity
    (B) Energy
    (C) Potential difference
    (D) None of these

11. __________ 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

12. Nucleus of 92U235 contains __________ protons.

    (A) 92
    (B) 235
    (C) 143
    (D) 325

13. 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

14. Nucleus of tritium has __________ neutrons.

    (A) 1
    (B) 2
    (C) 3
    (D) 5

15. Biological shield is provided in a nuclear power reactor to protect the __________ from radiation damage.

    (A) Fuel elements
    (B) Operating personnels
    (C) Walls of the reactor
    (D) None of these

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