chemical engineering nuclear power engineering MCQs – Page 5

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 Review each marked answer and report any item that may be outdated or unclear.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
81. Which one is different for the neutral atoms of the isotopes of an element ?
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A. Atomic weights

B. Atomic numbers

C. Number of protons

D. Number of electrons

82. Pick out the wrong statement?
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A. Out of ?, ?, and ?-rays, the one having maximum penetration power are ?-rays

B. Atoms with same number of nucleons but different number of protons are called isobars

C. The product formed by emission of ?-particle has mass number less by 4 units than the parent nuclide

D. Atoms with same number of protons but different number of nucleons are called isoters
83. The phenomenon of radioactivity was discovered by___________________?
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A. J.J. Thomson

B. Becquerel

C. Madam Curie

D. Roentgen

84. The radioisotope used to study the thyroid gland is__________________?
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A. Cobalt

B. Iron

C. Iodine

D. Carbon

85. Which of the following is a fuel for a fusion reactor (thermonuclear reactor) ?
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A. Deuterium and tritium

B. Thorium

C. U-233

D. Heavy water

86. Energy produced in the nuclear fission is of the order of _____________ MeV?
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A. 200

B. 2000

C. 1000

D. 20

87. Nuclear reactors are provided with shield to guard against the emission of mainly _____________ rays?
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A. ? and ?

B. X

C. Neutrons & gamma

D. Infrared

88. The amount of a radioactive material (having a half life of 100 years) remaining after 400 years will be ______________ of its original weight?
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A. 2-Jan

B. 1/16

C. 8-Jan

D. 4-Jan

89. Pick out the wrong statement?
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A. Electrons have negligible mass and unit negative change

B. The disintegration rate of a radioactive substance cannot be increased by heating it

C. Deuterium atom has one proton and two neutrons in its nucleus

D. Cadmium is capable of absorbing neutrons

90. Pick out the wrong statement?
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A. ?-particle emission from a radioactive element makes it electrically negative

B. A radioactive element having a half life period of 20 years will completely disintegrated in 40 years

C. The disintegration constant of a radioactive isotope is independent of pressure, temperature or concentration

D. ?-particle emission from a radioactive element makes it electrically positive

91. Which is a fertile nuclear fuel ?
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A. Th-232

B. U-235

C. Pu-239

D. U-233

92. Atoms of U-238 and U-235 differ in structure by three_____________________?
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A. Electrons

B. Neutrons

C. Electrons and three protons

D. Protons

93. Isotopes of an element have different_____________________?
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A. Nuclear charge

B. Chemical properties

C. Electronic configuration

D. Mass number
94. A fertile material is the one, which can be__________________?
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A. Fissioned by slow (thermal) neutrons

B. Fissioned by either slow or fast neutrons

C. Converted into fissile material on absorption of neutron

D. Fissioned by fast neutrons

95. One amu is equivalent to___________________?
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A. 931 J

B. 931 eV

C. 931 Mev

D. 9.31 MeV

96. The disintegration rate of a radioactive element _______________?
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A. Progressively decreases

B. Remains constant throughout

C. Progressively increases

D. May increase or decrease depending on the material

97. The largest stable nucleus is ________________?
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A. U-235

B. Pb-206

C. Bi-209

D. U-238

98. Heat is generated in a nuclear reactor (thermal) by_________________?
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A. Absorption of neutrons in uranium atoms

B. Fission of U-235 by neutrons

C. Fusion of atoms of uranium

D. Combustion of a nuclear fuel e.g. uranium

99. Critical energy should be _______________ the neutron binding energy of the atom in order to initiate a nuclear fission?
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A. More than

B. Less than

C. Either more or less

D. Equal to

100. Which of the following undergoes fission reaction easily ?
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A. None of these

B. U-238

C. Th-232

D. U-235