A. return the neutrons back into the core
B. shield the radioactivity completely
C. check polllution
D. conserve energy
E. is not used
Related Mcqs:
- 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 - The fuel needed, with reflector in nuclear power plant, in order to generate sufficient neutrons to sustain a chain reaction, would be________________?
A. more
B. less
C. same
D. zero
E. negative, i.e. fuel would be generated - 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 - 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 - The most commonly used moderator in nuclear plants is___________________?
A. heavy water
B. concrete and bricks
C. graphite and concrete
D. deutrium
E. graphite - 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 - A nuclear unit becoming critical means_______________?
A. it is generating power to rated capacity
B. it is capable of generating much more than rated capacity
C. there is danger of nuclear spread
D. chain reaction that causes automatic splitting of the fuel nuclei has been established
E. it generates no heat - Which of the following nuclear reactor does not need a heat exchanger for generation of steam____________________?
A. gas cooled
B. liquid metal cooled
C. pressurised water
D. boiling water
E. none of the above - A nuclear fission produces energy of following order in MeV___________________?
A. 20
B. 200
C. 2000
D. 20,000
E. 2 x 105
