What is Nuclear Power Engineering and Thermal Physics MCQ - Set 08 - ObjectiveBooks
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What is Nuclear Power Engineering and Thermal Physics MCQ - Set 08

Practice Test: Question Set - 08

1. Uranium is recovered from its ore (pitchblende) by
    (A) Froth floatation technique
    (B) Leaching with sulphuric acid
    (C) Smelting in a furnace
    (D) Dissolving in water

2. Percentage of heavy water in ordinary water is around
    (A) 0.015
    (B) 7.54
    (C) 0.71
    (D) 32.97

3. Which of the following is not an ore of uranium?
    (A) Pitchblende
    (B) Kyanite
    (C) Carnotite
    (D) Rescolite

4. Atoms with same number of neutrons, but different number of nucleons are called
    (A) Isotones
    (B) Isobars
    (C) Isotopes
    (D) Isostere

5. "Critical mass" is the minimum mass of nuclear fissile material required for the
    (A) Sustainment of chain reaction
    (B) Power generation on commercial scale
    (C) Economic power generation
    (D) None of these

6. The emission of an a-particle causes the resultant nucleus to have
    (A) More atomic weight and less atomic number
    (B) Less atomic weight and less atomic number
    (C) Less atomic weight and more atomic number
    (D) None of these

7. When the difference between mass number and atomic number of atoms of two or more elements are same, the atoms are termed as
    (A) Isomers
    (B) Isotopes
    (C) Isobars
    (D) Isotones

8. Neutrons have mass approximately equal to that of __________ atoms.
    (A) Hydrogen
    (B) Helium
    (C) Deuterium
    (D) None of these

9. Nuclear fuel generally used in reactors is uranium oxide instead of uranium, because the former has higher
    (A) Melting point, hence can be subjected to higher temperature
    (B) Density; hence core volume for a given power output would be smaller
    (C) Resistance to effects of irradiation
    (D) All (a), (b) and (c)

10. Which of the following is artificially produced as it does not occur in nature?
    (A) Uranium-235
    (B) Uranium-233
    (C) Plutonium-239
    (D) Both (b) and (c)

11. Radioactivity of an isotope is expressed in
    (A) Barn
    (B) MeV
    (C) Curie
    (D) Ergs

12. Hydrogen differs from deuterium in __________ properties.
    (A) Radioactive
    (B) Physical
    (C) Chemical
    (D) All (a), (b) and (c)

13. The half life period of a radioactive element is 100 days. After 400 days, one gm of the element will be reduced to __________ gm.
    (A) 1/4
    (B) 1/8
    (C) 1/2
    (D) 1/16

14. The atomic weight and atomic number of an element are A and Z respectively. What is the number of neutrons in the atom of that element?
    (A) A + Z
    (B) A - Z
    (C) A
    (D) Z

15. The mass number of an element is not changed, when it emits __________ radiations.
    (A) α & β
    (B) β & γ
    (C) γ & α
    (D) α, β, & γ

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