Nuclear Power Engineering MCQs

Question 1

U-235 content in enriched uranium, that is normally used in power reactors (e.g., at Tarapur atomic power plant), is about __________ percent.

Accepted Answer

3

Answer

85

Answer

50

Answer

97

Question 2

The atomic mass of an element is fractional, because

Accepted Answer

It may have isotopes

Answer

Of uncertainty principle

Answer

It may have isobars

Answer

It contains neutrons

Question 3

The phenomenon of nuclear fission is opposite to that of

Accepted Answer

Nuclear fusion

Answer

Radioactive decay

Answer

Thermionic emission

Answer

Combustion

Question 4

In nuclear reactions, __________ number is conserved.

Accepted Answer

Both A & B

Answer

Mass

Answer

Atomic

Answer

Neither A nor B

Question 5

Uranium is recovered from its ore (pitchblende) by

Accepted Answer

Leaching with sulphuric acid

Answer

Froth floatation technique

Answer

Smelting in a furnace

Answer

Dissolving in water

Question 6

Commercial power generation from fusion reactor is not yet possible, because

Accepted Answer

It is difficult to control fusion reaction

Answer

The fuel required (e.g. deuterium and tritium) is scarce

Answer

It is difficult to initiate fusion reaction

Answer

Quantity of fuel required for initiating fusion reaction is prohibitively high

Question 7

Pick out the wrong statement.

Accepted Answer

A radioactive element having a half life period of 20 years will completely disintegrated in 40 years

Answer

Α-particle emission from a radioactive element makes it electrically negative

Answer

Β-particle emission from a radioactive element makes it electrically positive

Answer

The disintegration constant of a radioactive isotope is independent of pressure, temperature or concentration

Question 8

Which one is different for the neutral atoms of the isotopes of an element?

Accepted Answer

Atomic weights

Answer

Atomic numbers

Answer

Number of protons

Answer

Number of electrons

Question 9

The 92 U 238 emits an a-particle. The product is

Accepted Answer

90 U 234

Answer

90 U 238

Answer

90 U 236

Answer

92 U 236