The molecular weight of heavy water is_________________?
The molecular weight of heavy water is_________________?
A. 10
B. 18
C. 20
D. 36
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Ordinary water is not used as a moderator because, it___________________?
Ordinary water is not used as a moderator because, it___________________?A. Has a low absorption cross-section
B. Has a low scattering cross-section
C. Absorbs neutrons
D. Does not absorb neutronsVelocity of the thermal neutron (< 0.025 eV) used for fission of U-235 is around _____________ m/sec?
Velocity of the thermal neutron (< 0.025 eV) used for fission of U-235 is around _____________ m/sec?A. 1
B. 2200
C. 3 × 1011
D. 9 × 1021Extraction of uranium from its ore is done by ______________ method?
Extraction of uranium from its ore is done by ______________ method?A. Chemical
B. Pyrometallurgical
C. Physical beneficiation
D. ElectrometallurgicalThe new nucleus formed after β-decay of a radioactive element has___________________?
The new nucleus formed after β-decay of a radioactive element has___________________?A. Less atomic number
B. Less atomic weight
C. More atomic number
D. More atomic weightWater is a better coolant than a gas (like CO2, He, N2 etc.), because it_________________?
Water is a better coolant than a gas (like CO2, He, N2 etc.), because it_________________?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.Which of the following types of nuclear reactors is most prone to radioactive hazards ?
Which of the following types of nuclear reactors is most prone to radioactive hazards ?A. Pressurised water reactor
B. Gas cooled reactor
C. Molten sodium cooled reactor
D. Boiling water reactor