POWER PLANT ENGINEERING QUIZ

In nuclear fission

None of the listed here

The original elements change into completely different elements

The molecules rearrange themselves to form other molecules

The electrons of the element change

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Ideally the neutron flux in reactor should be

Maximum in centre and zero at side

Zero throughout

Uniform throughout

Maximum at side and zero in canter

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Which of the following is not a safety valve for the boilers?

dead weight type

Spring type

Level type

sliding type

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The unit of radioactivity is

Curie

MV

Electron ampere

Electron volt

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Which of the following particles is the lightest?

Nucleus

Electron

Meson

Proton

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Amongst the following, the fissionable materials are

U₂₃₁ and Pu₂₃₃

U₂₃₅ and Pu₂₃₅

U₂₃₈ and Pu₂₃₉

U₂₃₃ and Pu₂₂₉

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The predominant isotope of the naturally occurring element is

U₂₃₅

Pu₂₃₉

Pu₂₃₃

U₂₃₈

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Plutonium (Pu239) is produced

When U238 is irradiated by neutrons

Artificially

As basic raw material

By fission of Th232

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The most commonly used moderator in nuclear plants is

Concrete and bricks

Heavy water

Graphite and concrete

Graphite

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The size of the reactor is said to be critical when

It becomes uncontrollable

It produces no power

It explodes

Chain reaction can be initiated

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