Related Questions

Heavy water is used as a moderator in a nuclear reactor. The function of the moderator is
A to control the energy released in the reactor
B to absorb neutrons and stop the chain reaction
C to cool the reactor
D to slow down the neutrons to thermal energy
Boiling water reactor uses the following as moderator, coolant and working fluid
A Ordinary fluid
B Heavy water
C Molten lead
D Hydrogen gas
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
The distillation carried out in such a way that the liquid with the lowest boiling point is first evaporated and re-condensed, then the liquid with the next higher boiling point is then evaporated and re-condensed, and so on until all the available liquid fuels are separately recovered in the sequence of their boiling points. Such a process is called
A Cracking
B Fractional distillation
C Full distillation
D Carbonisation
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
__________ moderator is used in a fast breeder reactor.
A Heavy water
B Graphite
C No
D Beryllium
Which of the following is used as a moderator in nuclear reactor?
A Thorium
B Graphite
C Radium
D Ordinary water
The fast breeder reactor uses the following moderator
A Demineralised water
B Carbon dioxide
C Heavy water
D No moderator is used
Where reactor operation is designed with fast neutrons such as in reactors using highly enriched fuel, the moderator used is
A Heavy water
B Graphite
C Carbon dioxide
D No moderator is needed
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

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