Q.1

__________ moderator is used in a fast breeder reactor.

  • Graphite
  • Heavy water
  • Beryllium
  • No
Q.2

Absorption/scattering cross-section of an element is expressed in "barn", which is equivalent to

  • 10-24 cm2
  • 10-12 cm
  • 1 Angstrom
  • 10-24 cm
Q.3

The most commonly used nuclear fuel in boiling water reactor is

  • enriched uranium
  • natural uranium
  • plutonium
  • monazite sand
Q.4

Which of the following is not used as a nuclear fuel cladding material ?

  • Zircalloy
  • Cadmium
  • Ceramics
  • Stainless steel
Q.5

How many atoms are present in one gm-atom of an element ?

  • 2 x 1023
  • 6 x 1023
  • 6 x 1032
  • 5 x 105
0 h : 0 m : 1 s