Q.1
Thorium⁻²32 is converted into uranium⁻²33 in a/an __________ nuclear reactor.
Q.2
The size of an atom is of the order of one
Q.3
The decrease in the atomic number is not observed in case of
Q.4
Gas cooling as compared to water cooling of nuclear reactors
Q.5
Percentage of heavy water in ordinary water is around
Q.6
Pressure of CO₂ gas (which is a coolant) in the Calder-Hall nuclear reactor is __________ kgf/cm² .
Q.7
Research reactors are normally meant for
Q.8
The half life period of a radioactive element depends upon the
Q.9
Which of the following is a fuel for a fusion reactor (thermonuclear reactor)?
Q.10
The molecular weight of heavy water is
Q.11
Pressure in a Pressurised Water Reactor (PWR) is used for
Q.12
The ratio of volume of an atom to that of its nucleus is
Q.13
Which of the following is present in Bhabha Atomic Research Centre (BARC) complex, Trombay (Bombay)?
Q.14
Nuclides having the same atomic numbers are termed as
Q.15
Isotopes of an element have the same
Q.16
Which of the following nuclear reactors is the most efficient thermodynamically while operating between the same temperature and pressure limits of the reactor?
Q.17
A thermal nuclear reactor compared to a fast breeder reactor
Q.18
Which of the following may be used to measure the rate of nuclear disintegration?
Q.19
The critical mass of a fissionable material can be reduced by
Q.20
Nuclear fuel usually used in a Boiling Water Reactor (BWR) is
Q.21
The velocity of thermal (slow) neutrons triggering nuclear fission reaction (having energy equal to 0.025 eV) is about __________ metres/second.
Q.22
Bhabha Atomic Research Centre (BARC) located at Trombay (near Bombay) has
Q.23
The function of moderators in nuclear reactor is to
Q.24
Which of the following ores contains maximum percentage of uranium?
Q.25
Fission of U-235 on slow neutron bombardment can be represented by
Q.26
Safety rods provided in nuclear reactors to guard against accidents, in case of earthquake are made of
Q.27
Which is a fertile nuclear fuel?
Q.28
Which of the following is not used as a nuclear fuel cladding material?
Q.29
Heavy water is preferred over ordinary water as a coolant, because it.
Q.30
Number of secondary neutron emitted on fission of an atom of U-235 by slow neutron bombardment is
0 h : 0 m : 1 s