A. Moderators slow down the neutrons
B. Moderators bring the neutrons to rest
C. Moderators absorb the neutrons
D. Moderators reflect the neutrons
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Related Mcqs:
- For chain reaction to build up the size of the radioactive target should be______________?
A. Greater than the critical size
B. Less than the critical size
C. Equal to the critical size
D. All of above can build up a change reaction - Transuranic elements have an atomic number_______________?
A. Greater than 72
B. Greater than 82
C. Greater than 92
D. Greater than 102 - Average energy required to remove one nucleon from the nucleus is called__________________?
A. Binding energy per nucleon
B. Energy of decay
C. Destruction energy
D. All of above - Mass of neutron is________________?
A. 1.67 x 10-31 kg
B. 1.67 x 10-27 kg
C. 9.1 x 10-31 kg
D. 1.67 x 10-19 kg - During the fission process a large amount of______________?
A. Heat energy is released
B. Nuclear energy is released
C. Chemical energy is released
D. Light energy is released - The path of alpha particle is_______________?
A. Rectilinear
B. Curved
C. Zig-zag or erratic
D. Elliptical - An alpha particle in a single encounter__________________?
A. Loses a small fraction of its energy
B. Losses most of its energy
C. Loses no energy at all
D. Loses all of its energy - CFC is used in _________________?
A. Refrigeration
B. Aerosol spray
C. Plastic foam industry
D. All of above - Why gamma rays are used to kill bacteria to sterilize surgical equipment etc ?
A. Chargeless
B. Massless
C. Highly penetrating
D. All of above - The maximum safe limit dose for persons working in a nuclear power station is ________________?
A. 1 rem per week
B. 5 rem per week
C. 4 rem per week
D. 3 rem per week
