The most commonly used moderator in nuclear plants is___________________?
(A) heavy water
(B) concrete and bricks
(C) graphite and concrete
(D) deutrium
(D) graphite
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
(D) moderate the radioactive pollution
Amongst the following, the fissionable materials are________________?
(A) U233andPu239
(B) U23iandPu233
(C) U235andPu235
(D) U238andPu239
(D) U243andPu235
The energy required to be applied to a radioactive nucleus for the emission of a neutron is________________?
(A) 1 MeV
(B) 2.4 MeV
(C) 4.3 MeV
(D) 7.8 MeV
(D) 20 MeV
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
(D) none of the above
In fast breeder reactors___________________?
(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
(D) moderator is dispensed with
Which of the following particles is the lightest__________________?
(A) nucleus
(B) electron
(C) proton
(D) meson
(D) neutron
In nuclear fission each neutron that causes fission releases_______________?
(A) no new neutron
(B) at least one new neutron
(C) one new neutron
(D) more than one new neutrons
(D) many-fold neutrons
Gas cooled reactor uses following materials as moderator, and coolant____________________?
(A) graphite, C02
(B) graphite, air
(C) heavy water, C02
(D) lead, H2
(D) concrete, N2