Chemical Engineering - Nuclear Power Engineering

41. 

Pick out the wrong statement.

A. Atoms with same number of nucleons but different number of protons are called isobars.
B. Atoms with same number of protons but different number of nucleons are called isoters.
C. Out of α, β, and γ-rays, the one having maximum penetration power are γ-rays.
D. The product formed by emission of α-particle has mass number less by 4 units than the parent nuclide.

Answer: Option B

Explanation:

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42. 

Which of the following is the most harmful for the human being ?

A. β-rays
B. X-rays
C. γ-rays
D. ultra violet rays

Answer: Option C

Explanation:

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43. 

Heavy water is preferred over ordinary water as a coolant, because it.

A. acts both as an efficient coolant as well as a moderator.
B. can be heated to a higher temperature without pressurizing.
C. is less prone to radiation damage.
D. all (a), (b) and (c).

Answer: Option D

Explanation:

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44. 

An element having large number of __________ is most easily subjected to nuclear fission.

A. protons
B. electrons
C. neutrons
D. nucleons

Answer: Option D

Explanation:

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45. 

Coolant used in a fast breeder reactor is

A. molten sodium
B. heavy water
C. ordinary water
D. helium

Answer: Option A

Explanation:

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