Practice Test: Question Set - 14
1. The most abundant isotope of natural uranium is
- (A) 92U238
- (B) 92U235
- (C) 92U234
- (D) None of these
2. A fast breeder reactor
- (A) Utilizes fast neutrons for causing fission
- (B) Converts fertile material (e.g., U-238) into fissile material
(Pu-239)
- (C) Normally employs molten sodium as coolant
- (D) All (a), (b) and (c)
3. A moderator __________ the neutrons.
- (A) Slows down
- (B) Absorbs
- (C) Accelerates
- (D) Reflects
4. Which is the most commonly used molten metal for cooling of nuclear reactors?
- (A) Calcium
- (B) Sodium
- (C) Mercury
- (D) Zinc
5. Extraction of uranium from its ore is done by __________ method.
- (A) Chemical
- (B) Pyrometallurgical
- (C) Physical beneficiation
- (D) Electrometallurgical
6. Percentage of the heavy water in ordinary water is around
- (A) 0.015
- (B) 7.54
- (C) 0.71
- (D) 32.97
7. Pick out the wrong statement.
- (A) The ratio of the density of the 'nucleus' to that of the 'atom' is
1012
- (B) α-particle is identical with a doubly charged helium ion
- (C) The mass of deuterium atom is half that of
helium atom
- (D) Gamma rays are high energy electrons
8. The 92U238 emits an a-particle. The product is
- (A) 90U234
- (B) 90U238
- (C) 90U236
- (D) 92U236
9. The atomic number of a radioactive element is not changed, when it emits __________ rays.
- (A) α
- (B) β
- (C) γ
- (D) α & β
10. Coolant used in a boiling water reactor is
- (A) Hydrogen gas
- (B) Water
- (C) Steam
- (D) A mixture of water & steam
11. Isotopes of an element have different
- (A) Mass number
- (B) Electronic configuration
- (C) Nuclear charge
- (D) Chemical properties
12. The ratio of neutrons to protons of an element having a mass number and atomic number of 80 and 40 respectively is
- (A) 1
- (B) 0.5
- (C) 2
- (D) 4
13. The ratio of atomic radius to its nuclear radius is about
- (A) 105
- (B) 108
- (C) 1012
- (D) 1015
14. Fast breeder Test Reactor (FBTR) is located at
- (A) Kalpakkam (near Madras)
- (B) Kota (in Rajasthan)
- (C) BARC (Trombay)
- (D) Tarapur (in Maharashtra)
15. Out of the following places, heavy water plant is not located at
- (A) Baroda
- (B) Ramagundam
- (C) Talcher
- (D) Tuticorin
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