Related Questions

Enriched uranium is required as a fuel in a nuclear reactor, if light water is used as moderator and coolant, because light water has
A High neutron absorption cross-section
B Low moderating efficiency
C High neutron scatter cross-section
D Low neutron absorption cross-section
CANDU type nuclear reactor using natural uranium as fuel is the extensively used nuclear reactor because of the fact that the
A Specific fuel consumption is very low due to the use of heavy water
B Fuel cost is much lower than that used in pressurised water or boiling water reactor
C Heavy water is used both as coolant as well as moderator
D Both B and C
Gold is 19 times as heavy as water and Copper is 9 times as heavy as water. Calculate the ratio in which these two metals should be mixed so that the mixture is 15 times as heavy as water.
A 40
B 41
C 42
D 43
If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________ reactor.
A Critical
B Breeder
C Fertile
D Heterogenous
Which of the following is used as a moderator in nuclear reactor?
A Thorium
B Graphite
C Radium
D Ordinary water
Which set of materials is used as a moderator in nuclear reactor?
A Zircalloy & berrylium
B Zircalloy & heavy water
C Zirconium & berrylium
D Heavy water & berrylium
Which of the following is not used as a moderator in nuclear reactor?
A Molten sodium
B Light water
C Beryllium
D Boron hydride
The function of heavy water in a nuclear reactor is to
A Slow down the speed of neutrons
B Increase the speed of neutrons
C Cool down the reactor
D Stop the nuclear reaction
Heavy water (D2O) in a nuclear reactor serves as a
A coolant
B moderator
C both A & B
D neutron absorber
In case of a __________ reactor, the composition in the reactor and at the exit of the reactor is the same.
A Semi-batch
B Tubular
C Batch
D Back-mix

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