A. graphite, C02
B. graphite, air
C. heavy water, C02
D. lead, H2
E. concrete, N2
Related Mcqs:
- Boiling water reactor uses the following as moderator, coolant and working fluid________________?
A. ordinary fluid
B. heavy water
C. molten lead
D. hydrogen gas
E. none of the above - In boiling water reactor, moderator is__________________?
A. coolant itself
B. ferrite rod
C. graphite rod
D. liquid sodium metal
E. blanket of thorium - Which of the following type of pump is used in liquid metal cooled reactor for circulation of liquid metal_________________?
A. centrifugal
B. axial
C. reciprocation
D. electromagnetic
E. diaphragm - The fast breeder reactor uses the following moderator__________________?
A. demineralised water
B. carbon dioxide
C. heavy water
D. graphite
E. no moderator is used - A fast breeder reactor uses following as fuel_________________?
A. enriched uranium
B. plutonium
C. thorium
D. U235
E. natrual uranium - A boiling water reactor uses following as fuel________________?
A. enriched uranium
B. plutonium
C. thorium
D. U
E. natural uranium. - The breeding gain in case of thermal breeder reactor as compared to fast breeder reactor is________________?
A. same
B. lower
C. higher
D. unity
E. higher/lower depending on the size of reactor - 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
E. much more. - Which of the following is more appropriate for a moderator. One which_________________?
A. does not absorb neutrons
B. absorbs neutrons
C. accelerates neutrons
D. eats up neutrons
E. regenerates neutrons - Moderator in nuclear plants is used to__________________?
A. reduce temperature
B. extract heat from nuclear reaction
C. control the reaction
D. cause collision with the fast moving neutrons to reduce their speed
E. moderate the radioactive pollution
