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Fresh Nuclear Engineering Interview Questions & Answers:

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1. Neutrons have mass approximately equal to that of __________ atoms.

A. hydrogen
B. helium
C. deuterium
D. none of these

Option A

2. Pick out the wrong statement.

A. The ratio of the density of the 'nucleus' to that of the 'atom' is 1012 .
B. α-particle is identical with a doubly charged helium ion.
C. The mass of deuterium atom is half that of helium atom.
D. Gamma rays are high energy electrons.

Option D

3. The disintegration rate of a radioactive element

A. progressively increases.
B. progressively decreases.
C. remains constant throughout.
D. may increase or decrease depending on the material.

Option B

4. Heavy water used in the nuclear reactors to slow down the speed of neutrons is

A. highly purified water.
B. a compound of oxygen and deuterium.
C. water having dissolved salts of heavy metals.
D. none of these.

Option B

5. Pressure of CO2 gas (which is a coolant) in the Calder-Hall nuclear reactor is __________ kgf/cm2 .

A. 0.2
B. 7
C. 35
D. 50

Option B

6. The electric power generation cost in nuclear power plant is less than that in a coal based thermal power plant, mainly because the

A. fuel cost per unit power generated is less.
B. thermal efficiency of the former is higher.
C. maintenance cost of the former is less.
D. none of these.

Option A

7. 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.

Option B

8. Molten sodium is used as a coolant in a fast breeder reactor, because of its

A. excellent moderating properties.
B. neutron breeding capability.
C. faster heat removal capability from the core.
D. capability to increase the reaction rate in the core.

Option C

9. 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

Option C

10. Coolant used in a fast breeder reactor is

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

Option A

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