Chemical Engineering - Nuclear Power Engineering

31. 

Positron is a/an

A. nucleus having two protons.
B. helium nucleus.
C. electron with positive charge.
D. nucleus with one proton and one neutron.

Answer: Option C

Explanation:

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32. 

Uranium is recovered from its ore (pitchblende) by

A. froth floatation technique.
B. leaching with sulphuric acid.
C. smelting in a furnace.
D. dissolving in water.

Answer: Option B

Explanation:

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33. 

Which of the following is the best nuclear fuel?

A. Np- 239
B. U-234
C. Pu-239
D. Th-236

Answer: Option C

Explanation:

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34. 

Pick out the correct statement.

A. Positron is the antiparticle of electron.
B. In α-decay, the ratio of neutron to proton decreases.
C. Ionising power of β-rays is higher than that of α-rays.
D. Speed of α-rays is more than that of γ-rays.

Answer: Option A

Explanation:

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35. 

Which of the following nuclear reactors is the most efficient thermodynamically while operating between the same temperature and pressure limits of the reactor ?

A. Molten sodium cooled
B. CO2 gas cooled
C. Pressurised water
D. Boiling water

Answer: Option D

Explanation:

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