Commercial power generation for fusion reactor is not yet possible, because
A. it is difficult to control fusion reaction
B. the fuel required (e.g., deuterium & tritium) is scarce
C. it is difficult to initiate fusion reaction
D. quantity of fuel required for initiating the fusion reaction is prohibitively high
Answer: Option A
An ideal coolant for a nuclear reactor should be
A. a good absorber of neutrons
B. capable of attaining high temperature, only when it is pressurised
C. of high density, but of low heat transfer coefficient
D. free from radiation damage & non-corrosive
Decay product of tritium which is a Beta emitter is
A. hydrogen
B. helium
C. deuterium
D. none of these
The function of moderators in nuclear reactor is to
A. slow down the secondary neutrons
B. absorb the secondary neutrons
C. control the chain reaction
D. none of these

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