Main source of ______________ is monazite sand?
Main source of ______________ is monazite sand?
A. Uranium
B. Polonium
C. Hafnium
D. Thorium
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Nuclear reactors are provided with shield to guard against the emission of mainly _____________ rays?
Nuclear reactors are provided with shield to guard against the emission of mainly _____________ rays?A. X
B. α and β
C. Neutrons & gamma
D. InfraredMolten sodium is used as a coolant in a fast breeder reactor, because of its_________________?
Molten sodium is used as a coolant in a fast breeder reactor, because of its_________________?A. Excellent moderating properties
B. Neutron breeding capability
C. Faster heat removal capability from the core
D. Capability to increase the reaction rate in the coreCoolant used in a boiling water reactor is________________?
Coolant used in a boiling water reactor is________________?A. Hydrogen gas
B. Water
C. Steam
D. A mixture of water & steamUranium is recovered from its ore (pitchblende) by________________?
Uranium is recovered from its ore (pitchblende) by________________?A. Froth floatation technique
B. Leaching with sulphuric acid
C. Smelting in a furnace
D. Dissolving in waterRadioactive decay of a material involves a _____________ order reaction?
Radioactive decay of a material involves a _____________ order reaction?A. Third
B. Second
C. First
D. ZeroThe atomic mass of an element is fractional, because ______________________?
The atomic mass of an element is fractional, because ______________________?A. Of uncertainty principle
B. It may have isobars
C. It contains neutrons
D. It may have isotopes