Chemical Engineering - Nuclear Power Engineering

46. 

Which of the following is not used as a moderator in nuclear reactor ?

A. Molten sodium
B. Light water
C. Beryllium
D. Boron hydride

Answer: Option A

Explanation:

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47. 

In β-decay of radioactive material, the ratio of neutron to proton

A. increases.
B. remains same.
C. decreases.
D. is unpredictable; may increase or decrease.

Answer: Option C

Explanation:

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48. 

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

Answer: Option D

Explanation:

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49. 

The critical mass of a fissionable material can be reduced by

A. heating it.
B. cooling it.
C. surrounding it by neutron reflecting material.
D. surrounding it by neutron absorbing material.

Answer: Option C

Explanation:

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50. 

Primary purpose of a __________ nuclear reactor is to supply a high neutron flux of the order of 1013 to 1014 neutrons/cm2 second.

A. research
B. power
C. breeder
D. homogeneous

Answer: Option A

Explanation:

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