Chemical Engineering - Nuclear Power Engineering

26. 

The atomic number of a radioactive element is not changed, when it emits __________ rays.

A. α
B. β
C. γ
D. α & β

Answer: Option C

Explanation:

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27. 

Fission of U-235 on slow neutron bombardment can be represented by

A. 92U235 + 3 γ1 56Ba143 + 36Kr90
B. 92U235 + 0n1 56Ba143 + 36Kr90 + 3 0n1
C. 92U235 + 0n1 56Ba143 + 36Kr90 + 3 0n1 + Q (energy)
D. 92U235 + 0n1 92U236 + 30n1+ Q (energy)

Answer: Option C

Explanation:

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28. 

A nuclear reactor can't be used for

A. the production of radioisotopes.
B. supplying intense fields or beams of neutron for scientific experiments.
C. marine ship propulsion.
D. none of these.

Answer: Option D

Explanation:

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29. 

Which of the following is a moderating material used in nuclear reactor ?

A. Graphite.
B. Cadmium.
C. Zircalloy (an alloy of zirconium and aluminium).
D. Stainless steel.

Answer: Option A

Explanation:

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30. 

The atomic number of an element is equal to the number of __________ present in its atom.

A. neutrons
B. electrons
C. protons
D. either (b) or (c)

Answer: Option D

Explanation:

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