A. heavy water
B. concrete and bricks
C. graphite and concrete
D. deutrium
E. graphite
Related Mcqs:
- 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 - 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 - 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 - 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 - In boiling water reactor, moderator is__________________?
A. coolant itself
B. ferrite rod
C. graphite rod
D. liquid sodium metal
E. blanket of thorium - The efficiency of a nuclear power plant in comparison to conventional and nuclear consideration is__________________?
A. higher cost of nuclear fuel
B. high initial cost
C. high heat rejection in condenser
D. lower temperature and pressure condi-tions
E. nuclear hazard risk - The most practical fuel for a thermo-nuclear reactor, both from econocical and nuclear consideration is____________________?
A. plutonium
B. uranium
C. deuterium
D. thorium
E. lithium - Reflector in nuclear plants is used to________________?
A. return the neutrons back into the core
B. shield the radioactivity completely
C. check polllution
D. conserve energy
E. is not used - The function of control rods in nuclear plants is to__________________?
A. control temperature
B. control readioactive pollution
C. control absorption of neutron
D. control fuel consumption
E. none of the above - The presence of reflector in nuclear power plants results in___________________?
A. increased production of neutrons
B. complete absorption of neutrons
C. controlled production of neutrons
D. decreased leakage of neutrons
E. decrease of speed of neutrons
