chemical engineering nuclear power engineering MCQs – Page 3

Practise multiple-choice questions from chemical engineering nuclear power engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering nuclear power engineering Mcqs
41. Which of the following is a non-fissile material ?
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A. Plutonium-239

B. Uranium-233

C. Uranium-235

D. Thorium-232
42. Which of the following is the most harmful for the human being ?
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A. Ultra violet rays

B. ?-rays

C. X-rays

D. ?-rays

43. The atomic number of a radioactive element is not changed, when it emits _____________ rays?
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A. ? & ?

B. ?

C. ?

D. ?
44. Absorption/scattering cross-section of an element is expressed in barn, which is equivalent to___________________?
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A. 10-12 cm

B. 10-24 cm

C. 10-24 cm2

D. 1 Angstrom

45. Which is not a fissile nuclear material ?
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A. U-233

B. U-235

C. Pu-239

D. U-238
46. Which of the following radiations is the least penetrating ?
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A. ?-rays

B. X-rays

C. ?-rays

D. ?-rays

47. A boiling water reactor is the one, in which the_______________________?
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A. Coolant water, after being heated in the reactor core, generates steam in a boiler

B. Fuel and the coolant are thoroughly mixed to form a homogeneous solution

C. Coolant water is allowed to boil in the core of the reactor

D. Pressurised water is pumped into the core

48. The ratio of atomic radius to its nuclear radius is about___________________?
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A. 108

B. 1012

C. 1015

D. 105
49. Nuclear fuel usually used in a Boiling Water Reactor (BWR) is__________________?
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A. Enriched uranium

B. Plutonium

C. Natural uranium

D. Thorium

50. Molten sodium (as a coolant in fast breeder reactor) ?
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A. tact with air or water</strong>

B. Cant attain high temperature at normal pressure

C. None of these

D. Is highly radioactive at elevated temperatures and can cause explosion, when it comes in

E. Is not at all corrosive, even at a higher temperature

51. The atomic number of an element is equal to the number of ______________ present in its atom?
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A. Protons

B. Neutrons

C. Either B. or C.

D. Electrons

52. Which of the following isotopes is not present in natural uranium?
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A. U-234

B. U-235

C. U-238

D. U-232
53. Energy equivalent to one atomic mass unit (amu) is ______________ MeV?
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A. 93.1

B. 9310

C. 931

D. 9.31

54. Mass of a positron is same as that of a/an__________________?
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A. Neutron

B. ?-particle

C. Electron

D. Proton

55. Enrichment of uranium is done to increase the concentration of ______________ in the natural uranium?
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A. U-233

B. U-238

C. U-235

D. Pu-239

56. The molecular weight of heavy water is_________________?
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A. 20

B. 10

C. 18

D. 36

57. If 4 gm of a radioisotope has a half life period of 10 days, the half life of 2 gm of the same isotope will be ____________ days?
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A. 5

B. 10

C. 20

D. 30

58. Coolant used in a boiling water reactor is________________?
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A. Steam

B. Water

C. Hydrogen gas

D. A mixture of water & steam
59. An element having large number of ______________ is most easily subjected to nuclear fission?
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A. Neutrons

B. Nucleons

C. Protons

D. Electrons

60. Which of the following nuclear reactors is the most efficient thermodynamically while operating between the same temperature and pressure limits of the reactor ?
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A. CO2 gas cooled

B. Molten sodium cooled

C. Pressurised water

D. Boiling water