7 FEBRUARY 2021 CURRENT AFFAIRS QUIZ

Which of the following radiations is the least penetrating?

β-rays

α-rays

X-rays

γ-rays

TRUE ANSWER : ?
YOUR ANSWER : ?

Nucleus of tritium has __________ neutrons.

5

2

3

1

TRUE ANSWER : ?
YOUR ANSWER : ?

Fast breeder test reactor at Kalpakkam is designed for using

Helium as a coolant

Thorium as a fertile material

U-238 as a fertile material

Uranium ore directly as a fuel

TRUE ANSWER : ?
YOUR ANSWER : ?

The critical mass of a fissionable material can be reduced by

Surrounding it by neutron absorbing material

Heating it

Cooling it

Surrounding it by neutron reflecting material

TRUE ANSWER : ?
YOUR ANSWER : ?

The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then

It will completely disintegrate in two months

It will completely disintegrate in four months

3/4th of it will disintegrate in two months

L/8th of it will remain intact at the end of four months

TRUE ANSWER : ?
YOUR ANSWER : ?

Both tritium and deuterium have the same number of

Nucleons

Protons

Neutrons

Electrons

TRUE ANSWER : ?
YOUR ANSWER : ?

Uranium ore is currently mined & concentrated at

Ghatsila

Alwaye

Jadugoda

Khetri

TRUE ANSWER : ?
YOUR ANSWER : ?

Candu reactor is a __________ nuclcear reactor.

Homogeneous

Highly enriched uranium (85% U-235) fuelled

Fast breeder

Natural uranium fuelled heavy water cooled & moderated

TRUE ANSWER : ?
YOUR ANSWER : ?

Fast breeder nuclear reactors using enriched uranium as fuel may contain upto a maximum of __________ percent of U-235 (i.e. fissile material).

45

65

85

15

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following gases has very high neutron capture cross-section, making it unsuitable as a coolant in nuclear reactor?

N₂

CO₂

He

H₂

TRUE ANSWER : ?
YOUR ANSWER : ?

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