A. lead or concrete
B. lead and tin
C. graphite or cadmium
D. thick galvanised sheets
E. black carbon papers
Related Mcqs:
- The main interest of shielding in nuclear reactor is protection against_______________?
A. X-rays
B. infra-red rays
C. a, P, and y rays
D. neutrons and gamma rays
E. electrons - 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 total energy released in fission of U is__________________?
A. 5 MeV
B. 10 MeV
C. 199 MeV
D. 168 MeV
E. 11 MeV - 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. - 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 - In boiling water reactor, moderator is__________________?
A. coolant itself
B. ferrite rod
C. graphite rod
D. liquid sodium metal
E. blanket of thorium - Ferrite material is____________________?
A. the most fissionable material
B. the basic fuel for nuclear paints
C. basic raw material for nuclear plants
D. the material which absorbs neutrons and undergoes spontaneous changes leading to the formation of fissionable material
E. none of the above - A reactor capable of converting a ferrite material into fissile isotopes is called____________________?
A. regenerative reactor
B. fast breeder reactor
C. breeder reactor
D. boiling water reactor
E. ferrite reactor - A nuclear fission produces energy of following order in MeV___________________?
A. 20
B. 200
C. 2000
D. 20,000
E. 2 x 105 - 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
