chemical engineering nuclear power engineering MCQs – Page 10

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 Review each marked answer and report any item that may be outdated or unclear.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
181. A radioactive substance does not emit________________?
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A. ?-ray

B. Proton

C. ?-ray

D. Position

182. The ratio of neutrons to protons of an element having a mass number and atomic number of 80 and 40 respectively is ___________________?
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A. 4

B. 1

C. 2

D. 0.5

183. Which is the most commonly used molten metal for cooling of nuclear reactors ?
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A. Mercury

B. Zinc

C. Sodium

D. Calcium

184. Critical mass is the minimum mass of nuclear fissile material required for the_______________________?
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A. Sustainment of chain reaction

B. Economic power generation

C. None of these

D. Power generation on commercial scale

185. Which of the following types of nuclear reactors is most prone to radioactive hazards ?
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A. Pressurised water reactor

B. Molten sodium cooled reactor

C. Boiling water reactor

D. Gas cooled reactor

186. Which of the following nuclear materials is fissile ?
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A. Thorium-232

B. None of these

C. Uranium-238

D. Plutonium-239
187. The ratio of volume of an atom to that of its nucleus is__________________?
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A. 1012

B. 8-Oct

C. 12-Oct

D. 108

188. The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?
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A. 159

B. 2537

C. 1837

D. 10000

189. Which of the following is not, a fertile material ?
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A. None of these

B. Th-232

C. U-238

D. U-233
190. A pressurised water reactor (PWR) uses pressurised water as a___________________?
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A. Moderator

B. Coolant

C. None of these

D. Working fluid in power turbine

191. The main ore of uranium is ______________________?
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A. Cassiterite

B. Monazite sand

C. Chalcopyrite

D. Pitchblende
192. The function of moderators in nuclear reactor is to _________________?
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A. None of these

B. Absorb the secondary neutrons

C. Slow down the secondary neutrons

D. Control the chain reaction

193. _____________ have the same mass number, but different nuclear charge ?
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A. Isobars

B. Isotopes

C. None of these

D. Isotones

194. Hydrogen bomb employs the nuclear fusion of __________________ ?
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A. Hydrogen

B. Helium

C. Deuterium

D. Tritium

195. U-235 content in enriched uranium, that is normally used in power reactors (e.g., at Tarapur atomic power plant), is about _____________ percent?
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A. 50

B. 97

C. 85

D. 3
196. Uranium is recovered from its ore (pitchblende) by________________?
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A. Smelting in a furnace

B. Froth floatation technique

C. Leaching with sulphuric acid

D. Dissolving in water

197. The half life period of a radioactive element depends on its _______________________?
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A. None of these

B. Pressure

C. Temperature

D. Amount

198. How many atoms are present in one gm-atom of an element ?
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A. 6 1023

B. 6 1032

C. 5 105

D. 2 1023

199. The half life period of a radioactive element depends upon the___________________?
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A. Temperature

B. None of these

C. Amount of element present

D. Pressure

200. 75% of a radioactive element decays in 6 hours. Its half life period is ______________ hours?
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A. 4

B. 3

C. 6-Jan

D. 4-Mar