A. 1
B. 2
C. 3
D. 4
0
An ideal coolant for a nuclear reactor should ________________?
0
Heavy water is preferred over ordinary water as a coolant, because it?
A. Be a good absorber of neutrons
B. Be capable of attaining high temperature, only when it is pressurised
C. Have high density, but low heat transfer co-efficient
D. Be free from radiation damage and non-corrosive
0
Primary purpose of a ____________ nuclear reactor is to supply a high neutron flux of the order of 1013 to 1014neutrons/cm2 second?
A. Acts both as an efficient coolant as well as a moderator
B. Can be heated to a higher temperature without pressurizing
C. Is less prone to radiation damage
D. All A., B. and C.
0
Fast breeder nuclear reactors using enriched uranium as fuel may contain upto a maximum of ____________ percent of U-235 (i.e. fissile material)?
A. Research
B. Power
C. Breeder
D. Homogeneous
0
Water is a better coolant than a gas (like CO2, He, N2 etc.), because it_________________?
A. 15
B. 45
C. 65
D. 85
0
Fuel for a nuclear reactor (thermal) is___________________?
A. Is a better neutron moderator as well
B. Require comparatively smaller pumps and heat exchanger for a given heat transfer rate
C. Has a better heat transfer characteristics, and it can be pressurised to attain a high temperature
D. All A., B. and C.
0
A heterogeneous reactor is the one, in which the moderator and the________________?
A. Uranium
B. Plutonium
C. Radium
D. None of these
0
The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then____________?
A. Coolant are different materials
B. Coolant are present in different phases (e.g., heavy water and graphite)
C. Fuel are present in different phases (e.g. uranium and heavy water)
D. None of these