3860. Net efficiency of ordinary light water cooled nuclear reactor is about __________ percent.
32
52
72
88
✅ The correct answer is option A.
3863. Nuclear fuel complex, Hyderabad is engaged in the job of
manufacture of nuclear fuel elements/assemblies .
processing of uranium ore.
treatment of spent fuel.
none of these.
✅ The correct answer is option A.
3867. An electron has a mass that is approximately __________ that of the proton.
1836 (approximately)
1/1836 (approximately)
1
∞
✅ The correct answer is option B.
3871. A heterogeneous reactor is the one, in which the moderator and the
coolant are different materials.
coolant are present in different phases (e.g., heavy water and graphite).
fuel are present in different phases (e.g. uranium and heavy water).
none of these.
✅ The correct answer is option C.
3876. Which of the following is artificially produced as it does not occur in nature ?
Uranium-235
Uranium-233
Plutonium-239
Both (b) and (c)
✅ The correct answer is option D.
3879. First experimental observation of nuclear fission was done by
Plane
Rutherford
Fermi
Hahn and Strassman
✅ The correct answer is option C.
3884. In β-decay of radioactive material, the ratio of neutron to proton
increases.
remains same.
decreases.
is unpredictable; may increase or decrease.
✅ The correct answer is option C.
3890. Extraction of uranium from its ore is done by __________ method.
chemical
pyrometallurgical
physical beneficiation
electrometallurgical
✅ The correct answer is option A.
3896. Nuclear fuel generally used in reactors is uranium oxide instead of uranium, because the former has higher
melting point, hence can be subjected to higher temperature.
density ; hence core volume for a given power output would be smaller.
resistance to effects of irradiation.
all (a), (b) and (c).
✅ The correct answer is option D.
3861. Which of the following undergoes fission reaction easily ?
U-235
U-238
Th-232
none of these
✅ The correct answer is option A.