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.Management Sciences
Category: Nuclear Power Plants
In nuclear fission___________________?
A. the original elements change into completely different elements
B. the electrons of the element change
C. the molecules rearrange themselves to form other molecules
D. none of the above
Gas cooled reactor uses following materials as moderator, and coolant____________________?
A. graphite, C02
B. graphite, air
C. heavy water, C02
D. lead, H2
E. concrete, N2
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
Which of the following is secondary fuel ?
A. Th232andU238
B. U233andPu239
C. U233andPu238
D. non oh these
The efficiency of a nuclear power plant in comparsion to a conventional thermal power plant is________________?
A. same
B. more
C. less
D. may be less or mote depending on size
E. unpredictable
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
Effective moderators are those materials which contain____________________?
A. light weight atoms
B. heavy weight atoms
C. critical atoms
D. zero weight atoms
E. there is no such criterion
A nuclear fission produces energy of following order in MeV___________________?
A. 20
B. 200
C. 2000
D. 20,000
E. 2 x 105
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
E. it produces tremendous power
Enriched uranium may contain fissionable contents of the order of__________________?
A. 1-99%
B. 1-25%
C. 1-50%
D. 1-75%
E. 1-90%.
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