Chemical Engineering - Nuclear Power Engineering

11. 

The decay product of tritium (a beta emitter) is

A. lithium
B. helium
C. deuterium
D. hydrogen

Answer: Option B

Explanation:

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12. 

Heat is generated in a nuclear reactor (thermal) by

A. combustion of a nuclear fuel e.g. uranium.
B. fusion of atoms of uranium.
C. absorption of neutrons in uranium atoms.
D. fission of U-235 by neutrons.

Answer: Option D

Explanation:

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13. 

The time taken for a radioactive element to reduce to 50% of its original weight is __________ years, if its half life period is 12 years.

A. 24
B. 18
C. 6
D. 36

Answer: Option B

Explanation:

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14. 

Which of the following may not need a moderator ?

A. Candu reactor
B. Fast breeder reactor
C. Homogeneous reactor
D. Pressurised water reactor

Answer: Option B

Explanation:

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15. 

The amount of a radioisotope remaining undecayed after a time equal to four times its half life, will be __________ percent.

A. 3.125
B. 6.25
C. 12.50
D. 25

Answer: Option B

Explanation:

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