61. Fuel for a nuclear reactor (thermal) is
uranium
plutonium
radium
none of these
✅ The correct answer is option A.
Nuclear Power Engineering MCQs
62. The electric power generation cost in nuclear power plant is less than that in a coal based thermal power plant, mainly because the
fuel cost per unit power generated is less.
thermal efficiency of the former is higher.
maintenance cost of the former is less.
none of these.
✅ The correct answer is option A.
63. The time taken for a radioactive element to reduce to 50% of its original weight is __________ years, if its half life period is 12 years.
24
18
6
36
✅ The correct answer is option B.
64. A control rod
should have small absorption cross-section.
is generally made of boron, hafnium or cadmium.
should have large absorption cross-section.
both (b) and (c).
✅ The correct answer is option D.
65. 75% of a radioactive element decays in 6 hours. Its half life period is __________ hours.
3-Apr
1-Jun
3
4
✅ The correct answer is option C.
66. Which of the following may not need a control rod ?
Liquid metal cooled reactor.
Fast breeder reactor.
Candu reactor.
None of these.
✅ The correct answer is option D.
67. Coolant used in a fast breeder reactor is
molten sodium
heavy water
ordinary water
helium
✅ The correct answer is option A.
68. A fast breeder reactor employs
graphite as moderator.
water as coolant.
molten sodium as coolant as well as moderator.
U-235 as fuel.
✅ The correct answer is option D.
69. The disintegration rate of a radioactive element
progressively increases.
progressively decreases.
remains constant throughout.
may increase or decrease depending on the material.
✅ The correct answer is option B.