21. When the difference between mass number and atomic number of atoms of two or more elements are same, the atoms are termed as
isomers
isotopes
isobars
isotones
✅ The correct answer is option D.
Nuclear Power Engineering MCQs
22. The decrease in the atomic number is not observed in case of
electron capture
β-emission
α-emission
positron emission
✅ The correct answer is option B.
23. The number of neutrons accompanying the formation of 54Xe139 and 38Sr94 from the absorption of a slow neutron by 92U235 , followed by nuclear fission is
1
2
3
4
✅ The correct answer is option C.
24. Indian monazite sand contains __________ percent thorium.
10
25
60
90
✅ The correct answer is option A.
25. __________ moderator is used in a fast breeder reactor.
Graphite
Heavy water
Beryllium
No
✅ The correct answer is option D.
26. The decay product of tritium (a beta emitter) is
lithium
helium
deuterium
hydrogen
✅ The correct answer is option B.
27. The emission of an a-particle causes the resultant nucleus to have
more atomic weight and less atomic number.
less atomic weight and less atomic number.
less atomic weight and more atomic number.
none of these.
✅ The correct answer is option A.
28. Final product of uranium extraction plant at Jadugoda (Bihar) is
uranium
uranium oxide
uranium carbide
magnesium diuranate
✅ The correct answer is option D.
29. Thorium can be converted into U-233 in a __________ reactor.
liquid metal cooled
fast breeder
thermal
swimming pool
✅ The correct answer is option B.
30. Percentage of the heavy water in ordi water is around
0.015
7.54
0.71
32.97
✅ The correct answer is option A.