74) The following present serious difficulty in designing reactor shield

alpha particles

beta particles

thermal neutrons

fast neutrons and gamma rays

Answer is:

fast neutrons and gamma rays

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75) In nuclear fission

the original elements change into completely different elements

the electrons of the element change

the molecules rearrange themselves to form other molecules

none of the above.

Answer is:

the original elements change into completely different elements

76) In order to have constant chain reaction to produce a constant rate of heat output, the value of ratio of the number of neutrons in one generation to the number of neutrons in the immediately preceding generation must be

greater than 1.0

less than 1.0

equal to zero

equal to 1.0

Answer is:

equal to 1.0

77) Each fission of U235 produces following number of fast neutrons per fission

1 neutron

1 — neutrons

1 - 2 neutrons

2 — neutrons

Answer is:

2 — neutrons

78) A fast breeder reactor uses following as fuel

enriched uranium

plutonium

thorium

U235

Answer is:

U235

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74) The following present serious difficulty in designing reactor shield

fast neutrons and gamma rays

Nuclear Power Plants Questions with Answers

Related Nuclear Power Plants Questions with Answers

75) In nuclear fission

the original elements change into completely different elements

76) In order to have constant chain reaction to produce a constant rate of heat output, the value of ratio of the number of neutrons in one generation to the number of neutrons in the immediately preceding generation must be

equal to 1.0

77) Each fission of U235 produces following number of fast neutrons per fission

2 — neutrons

78) A fast breeder reactor uses following as fuel

U235

Nuclear Power Plants Questions with Answers