456. In triggering fission, which type of neutrons are more effective
A.Fast
B.Slow
C.In bulk
D.Static

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457. The size of the reactor is said to be critical when
A.Chain reaction can be initiated
B.It becomes uncontrollable
C.It explodes
D.It produces no power

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458. When a reactor becomes critical, then the production of neutrons is
A.Infinite
B.Zero
C.Exactly balanced by the loss of neutrons through leakage
D.Initiated

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459. In the breeder reactors the generation of new fissionable atom is
A.At the lower rate than the consumption
B.At a higher rate than the constuption
C.At an equal rate of the consumption
D.Depends on other considerations

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460. The energy produced by a thermal reactor of same size as a breeder reactor is
A.Almost same
B.Slightly more
C.Slightly less
D.Much less

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461. Reactors designed for propulsion applications are designed for
A.Natural uranium
B.Enriched uranium
C.Pure uranium
D.Any type of uranium

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462. Supertheated steam is generated in following reactor
A.Boiling water
B.Gas cooled
C.Pressurised water
D.All of the above

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