protect the walls of the reactor from radiation damage.
absorb the fast neutrons.
slow down the secondary neutrons.
protect the fuel element from coming in contact with the coolant.
✅ The correct answer is option A.
Engineering
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3732. Fuel for a fast breeder reactor is
plutonium
uranium
radium
neptunium
✅ The correct answer is option A.
3733. Which of the following nuclear reactors is the most efficient thermodynamically while operating between the same temperature and pressure limits of the reactor ?
Molten sodium cooled
CO2 gas cooled
Pressurised water
Boiling water
✅ The correct answer is option D.
3734. Number of secondary neutron emitted on fission of an atom of U-235 by slow neutron bombardment is
3
235
200
92
✅ The correct answer is option A.
3735. The most commonly used nuclear fuel in boiling water reactor is
enriched uranium
natural uranium
plutonium
monazite sand
✅ The correct answer is option A.
3736. “Critical mass” is the minimum mass of nuclear fissile material required for the
sustainment of chain reaction.
power generation on commercial scale.
economic power generation.
none of these.
✅ The correct answer is option A.
3737. If 4 gm of a radioisotope has a half life period of 10 days, the half life of 2 gm of the same istotope will be __________ days.
5
10
20
30
✅ The correct answer is option B.
3738. Thermal nuclear reactors using enriched uranium as fuel contains a maximum of __________ percent fissile material i.e. U-235.
1
2
3
7
✅ The correct answer is option C.
3739. Mass of a positron is same as that of a/an
electron
α-particle
proton
neutron
✅ The correct answer is option A.
3740. Which of the following is a fuel for a fusion reactor (thermonuclear reactor) ?
Deuterium and tritium
U-233
Thorium
Heavy water
✅ The correct answer is option A.