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.Management Sciences
Category: Nuclear Power Engineering
The critical mass of a fissionable material can be reduced by__________________?
A. Heating it
B. Cooling it
C. Surrounding it by neutron reflecting material
D. Surrounding it by neutron absorbing material
“Critical mass” is the minimum mass of nuclear fissile material required for the_______________________?
A. Sustainment of chain reaction
B. Power generation on commercial scale
C. Economic power generation
D. None of these
Artificially produced radioactive isotopes are used for____________________?
A. Power generation
B. Treatment of certain diseases
C. Initiating nuclear fission and fusion
D. All A., B. and C.
A fast breeder reactor____________________?
A. Uses natural uranium as fuel
B. Does not require a moderator
C. Both A. and B.
D. Neither A. nor B.
Enriched uranium means that, it contains___________________?
A. More than 0.71% of U-235
B. Only fertile material
C. Only fissile material
D. No impurities
A radioactive isotope undergoes decay with respect to time following _____________ law?
A. Logarithmic
B. Exponential
C. Linear
D. Inverse square
Final product of uranium extraction plant at Jadugoda (Bihar) is________________?
A. Uranium
B. Uranium oxide
C. Uranium carbide
D. Magnesium diuranate
In β-decay of radioactive material, the ratio of neutron to proton____________________?
A. Increases
B. Remain same
C. Decreases
D. Is unpredictable; may increase or decrease
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