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.Management Sciences
Category: Nuclear Power Engineering
How many atoms are present in one gm-atom of an element ?
A. 2 × 1023
B. 6 × 1023
C. 6 × 1032
D. 5 × 105
What is the average life of a radioactive atom having a ‘half life period’ of T ?
A. 1.44 T
B. 0.144 T
C. 14.4 T
D. 2T
Which of the following accounts for the maximum energy release in the nuclear fission process ?
A. Kinetic energy of fission products
B. Radioactive decay of fission products
C. Instantaneous release of γ-rays
D. Kinetic energy of neutrons
Fast breeder reactors are most usable in India, because of our largest _____________ deposits?
A. Thorium
B. Plutonium
C. Uranium
D. None of these
Which is the most commonly used molten metal for cooling of nuclear reactors ?
A. Calcium
B. Sodium
C. Mercury
D. Zinc
Which of the following is not a good moderating material ?
A. Concrete
B. Boron
C. 18/8 stainless steel
D. All A., B. and C.
The ratio of atomic radius to its nuclear radius is about___________________?
A. 105
B. 108
C. 1012
D. 1015
Which of the following is not an ore of uranium ?
A. Pitchblende
B. Kyanite
C. Carnotite
D. Rescolite
Pick out the correct statement?
A. Loss of electrons from neutral atoms produces negative ions
B. The radius of nucleus & atomic size are of the order of 10-12 cm & 10-8 cm respectively
C. Gain of electrons by neutral atoms form cations
D. Proton to neutron ratio in a stable nucleus is 2 : 1
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
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