- (A) U233andPu239
- (B) U
- (C) U238andPu239
- (D) U238andTh239
- (E) none of the above
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- (A) X-rays
- (B) infra-red rays
- (C) a, P, and y rays
- (D) neutrons and gamma rays
- (E) electrons
- (A) heavy water
- (B) concrete and bricks
- (C) graphite and concrete
- (D) deutrium
- (E) graphite
- (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
- (A) MeV
- (B) curie
- (C) farads
- (D) MW
- (E) kWhr
- (A) U233andPu239
- (B) U23iandPu233
- (C) U235andPu235
- (D) U238andPu239
- (E) U243andPu235
- (A) 1 MeV
- (B) 2.4 MeV
- (C) 4.3 MeV
- (D) 7.8 MeV
- (E) 20 MeV
- (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) any type of moderator can be used
- (B) graphite is used as the moderator
- (C) heavy water is used as the moderator
- (D) moderator may or may not be used
- (E) moderator is dispensed with
- (A) nucleus
- (B) electron
- (C) proton
- (D) meson
- (E) neutron
