Final product of uranium extraction plant at Jadugoda (Bihar) is________________?

A. Uranium
B. Uranium oxide
C. Uranium carbide
D. Magnesium diuranate

Which is the most commonly used molten metal for cooling of nuclear reactors ?

A. Calcium
B. Sodium
C. Mercury
D. Zinc

A radioactive isotope undergoes decay with respect to time following _____________ law?

A. Logarithmic
B. Exponential
C. Linear
D. Inverse square

Number of secondary neutron emitted on fission of an atom of U-235 by slow neutron bombardment is_______________?

A. 3
B. 235
C. 200
D. 92

Thorium metal__________________?

A. Resembles steel in appearance
B. Is less hard (in the range of silver)
C. Is highly ductile
D. All A., B. and C.

The half life period of a radioactive element depends on its _______________________?

A. Temperature
B. Pressure
C. Amount
D. None of these

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

Fuel for a nuclear reactor (thermal) is___________________?

A. Uranium
B. Plutonium
C. Radium
D. None of these

Thermal nuclear reactors using enriched uranium as fuel contains a maximum of ____________ percent fissile material i.e. U-235?

A. 1
B. 2
C. 3
D. 7

The phenomenon of radioactivity was discovered by___________________?

A. Madam Curie
B. Becquerel
C. Roentgen
D. J.J. Thomson