A moderator _____________ the neutrons?
A moderator _____________ the neutrons?
A. Slows down
B. Absorbs
C. Accelerates
D. Reflects
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Critical energy should be _______________ the neutron binding energy of the atom in order to initiate a nuclear fission?
Critical energy should be _______________ the neutron binding energy of the atom in order to initiate a nuclear fission?A. Equal to
B. Less than
C. More than
D. Either more or lessThe mass number of an element is not changed, when it emits _______________ radiations?
The mass number of an element is not changed, when it emits _______________ radiations?A. α & β
B. β & γ
C. γ & α
D. α, β, & γEnergy produced in the nuclear fission is of the order of _____________ MeV?
Energy produced in the nuclear fission is of the order of _____________ MeV?A. 20
B. 200
C. 1000
D. 2000Fast breeder reactors do not____________________?
Fast breeder reactors do not____________________?A. Use Th-232 as fissile fuel
B. Convert fertile material to fissile material
C. Use fast neutrons for fission
D. Use molten sodium as coolantA homogeneous reactor is the one, in which the___________________?
A homogeneous reactor is the one, in which the___________________?A. Fissile atoms are evenly distributed throughout the mass of nuclear reactor
B. Same substance (e.g. heavy water) is used as moderator & coolant
C. The fuel and the moderator is mixed to form a homogeneous material
D. All A., B. and C.Unit of radioactivity is__________________?
Unit of radioactivity is__________________?A. Barn
B. Fermi
C. Angstrom
D. Curie