nuclear power plants MCQs – Page 3

Practise focused nuclear power plants questions with marked answers for exam preparation and subject revision.

nuclear power plants Mcqs
41. U235 will undergo fission by__________________?
comments icon0
A. either fast or slow neutrons

B. low energy (slow) neutrons alone

C. high energy (fast) neutrons alone

D. none of the above

E. medium energy neutrons

42. Half life of a radioactive isotope corresponds to the time required for half of the following to decay__________________?
comments icon0

A. protons

B. electrons

C. neutrons

D. nulceus

E. atom
43. A fission chain reaction in uranium can be developed by________________?
comments icon0

A. using moderator

B. absorbing all neutrons

C. slowing down fast neutrons so that Uz fission continues by slow motion neutrons

D. accelerating fast neutrons

E. enriching U235

44. Plutonium is produced________________?
comments icon0
A. by neutron irradiation of Uz

B. in high capacity furnace

C. as basic raw material

D. by neutron irradiation of throium

E. artificially

45. A fast breeder reactor uses following as fuel_________________?
comments icon0

A. natrual uranium

B. enriched uranium

C. U235

D. plutonium

E. thorium

46. Uranium-233 is produced__________________?
comments icon0

A. by neutron irradiation of Uz

B. by neutron irradiation of thorium

C. as basic raw material

D. in high capacity furnaces

E. artificially

47. In order to have constant clain reaction to produce a constant rate of heat output, the value of ratio of the number of neutrons in one generation to the number of neutrons in the immediately preceding generation must be________________?
comments icon0

A. less than 1.0

B. greater than 1.0

C. equal to zero

D. equal to 1.0

E. equal to infinity

48. A fast breeder reactor__________________?
comments icon0

A. uses graphite rods as moderator

B. uses ferrite material as moderator

C. has no moderator

D. has powerful moderator

E. uses pressurised water as moderator

49. In triggering fission, the following types of neutrons are desirable_________________?
comments icon0

A. fast moving

B. neutrons at rest

C. slow moving

D. critical neutrons

E. none of the above

50. The presence of reflector in nuclear power plants results in___________________?
comments icon0

A. increased production of neutrons

B. controlled production of neutrons

C. complete absorption of neutrons

D. decrease of speed of neutrons

E. decreased leakage of neutrons
51. The risk of radioactive hazard is greatest in the turbine with following reactor___________________?
comments icon0

A. all of the above.

B. boiling water

C. liquid metal cooled

D. gas cooled

E. pressurised water

52. Which of the following can be used as a coolant in nuclear plant________________?
comments icon0
A. light or heavy water

B. carbon tetrachloride

C. freon

D. carbon dioxide

E. molten lead

53. In the breeder reactors the generation of new fissionable atom is_________________?
comments icon0
A. at a higher rate than the constuption

B. unpredictable

C. at the lower rate than the consumption

D. depends on other considerations

E. at an equal rate of the consumption

54. The function of control rods in nuclear plants is to__________________?
comments icon0

A. control absorption of neutron

B. readioactive pollution

C. none of the above

D. control temperature

E. control fuel consumption

55. The fuel needed, with reflector in nuclear power plant, in order to generate sufficient neutrons to sustain a chain reaction, would be________________?
comments icon0
A. less

B. zero

C. more

D. same

E. negative, i.e. fuel would be generated

56. Supertheated steam is generated in following reactor________________?
comments icon0

A. all of the above

B. gas cooled

C. boiling water

D. pressurised water

E. none of the above

57. Which of the following is secondary fuel ?
comments icon0

A. non oh these

B. U233andPu238

C. U233andPu239

D. Th232andU238

58. Pick up the wrong statement Fast breeder reactors__________________?
comments icon0

A. are unmoderated

B. are liquid-metal cooled

C. produce more fuel than they consume

D. use water as coolant

E. operate at extremely high power densities.

59. Enriched uranium may contain fissionable contents of the order of__________________?
comments icon0

A. 1-90%.

B. 1-50%

C. 1-75%

D. 1-25%

E. 1-99%
60. In a fission process, maximum %age of energy is released as___________________?
comments icon0

A. gradual readioactive decay of fission products

B. kinetic energy of neutrons

C. none of the above

D. instantaneous release of gamma rays

E. kinetic energy of fission products