Lakshya Education MCQs

Question: β-rays emission in radioactive disintegration is always accompanied by the emission of
D.None of these
Answer: Option A

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Question 1. A radioactive substance does not emit
  1.    Α-ray
  2.    Proton
  3.    Position
  4.    Β-ray
Answer: Option B
Question 2. The type of pump used for the recirculation of molten sodium coolant in liquid metal cooled reactor is a/an __________ pump.
  1.    Electromagnetic
  2.    Reciprocating
  3.    Centrifugal
  4.    Volute
Answer: Option A
Question 3. A boiling water reactor is the one, in which the
  1.    Coolant water is allowed to boil in the core of the reactor
  2.    Coolant water, after being heated in the reactor core, generates steam in a boiler
  3.    Pressurised water is pumped into the core
  4.    Fuel and the coolant are thoroughly mixed to form a homogeneous solution
Answer: Option A
Question 4. Heat is generated in a nuclear reactor (thermal) by
  1.    Combustion of a nuclear fuel e.g. uranium
  2.    Fusion of atoms of uranium
  3.    Absorption of neutrons in uranium atoms
  4.    Fission of U-235 by neutrons
Answer: Option D
Question 5. Fuel for a nuclear reactor (thermal) is
  1.    Uranium
  2.    Plutonium
  3.    Radium
  4.    None of these
Answer: Option A
Question 6. A fast breeder reactor
  1.    Utilises fast neutrons for causing fission
  2.    Converts fertile material (e.g., U-238) into fissile material (Pu-239)
  3.    Normally employs molten sodium as coolant
  4.    All of the above
Answer: Option D

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