POWER PLANT ENGINEERING QUIZ

The control rods in the control system of nuclear reactors are used to

Control temperature

Absorb excess neutrons

Control fuel consumption

All of these

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The process by which a heavy nucleus is spitted into two light nuclei is known as

Disintegration

Fusion

Splitting

Fission

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The secondary fuel used in nuclear power plants is

U₂₃₅ and Th₂₃₂

U₂₃₅ and Pu₂₃₈

U₂₃₃ and Pu₂₃₉

U₂₃₃ and Pu₂₃₈

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A fission chain reaction in uranium can be developed by

Absorbing all neutrons

Slowing down fast neutrons so that Uz fission continues by slow motion neutrons

Accelerating fast neutrons

Using moderator

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In fast breeder reactors

Any type of moderator can be used

Moderator is dispensed with

Heavy water is used as the moderator

Graphite is used as the moderator

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A fast breeder reactor

Has no moderator

Uses ferrite material as moderator

Uses graphite rods as moderator

Has powerful moderator

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The coolant used in boiling water reactor is

Pressurised water

Liquid metal

Mixture of water and steam

CO2

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The size of the reactor is said to be critical when

Chain reaction can be initiated

It produces no power

It explodes

It becomes uncontrollable

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U235 will undergo fission by

Either fast or slow neutrons

Low energy(slow) neutrons alone

Medium energy neutrons

High energy(fast) neutrons alone

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In triggering fission, the following types of neutrons are desirable

Slow moving

Fast moving

Critical neutrons

Neutrons at rest

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