POWER PLANT ENGINEERING QUIZ

The fuel needed, with reflector in nuclear power plant, in order to generate sufficient neutrons to sustain a chain reaction, would be

Less

Same

More

Zero

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Nuclear reactors are used

All of the listed here

To produce heat for thermoelectric power

To propel ships, submarines, aircrafts

To produce fissionable material

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U238 will undergo fission by

High energy (fast) neutrons alone

Medium energy neutrons

Either fast or slow neutrons

Low energy (slow) neutrons alone

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When a reactor becomes critical, then the production of neutrons is

Zero

Initiated

Exactly balanced by the loss of neutrons through leakage

Infinite

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Boiling water reactor uses the following as moderator, coolant and working fluid

Ordinary fluid

Hydrogen gas

Heavy water

Molten lead

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The most commonly used moderator in nuclear plants is

Concrete and bricks

Graphite

Graphite and concrete

Heavy water

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Enriched uranium is required as a fuel in a nuclear reactor, if light water is used as moderator and coolant, because light water has

High neutron scatter cross-section

Low moderating efficiency

Low neutron absorption cross-section

High neutron absorption cross-section

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In fast breeder reactors

Any type of moderator can be used

Heavy water is used as the moderator

Moderator is dispensed with

Graphite is used as the moderator

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Atomic number of an element in the periodic table represents the numbers of

Electrons in the nucleus

Electrons in the atom

Protons in the nucleus

Neutrons in the nucleus

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A boiling water reactor uses following as fuel

U

Enriched uranium

Plutonium

Thorium

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