Chemical Engineering MCQs

Page No. 369

The disintegration rate of a radioactive element _______________?


aProgressively increases

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bProgressively decreases

✓


cRemains constant throughout

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dMay increase or decrease depending on the material

✖



The phenomenon of nuclear fission is opposite to that of__________________?


aRadioactive decay

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bThermionic emission

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cNuclear fusion

✓


dCombustion

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View Answer Nuclear fusion

The most commonly used nuclear fuel in boiling water reactor is___________________?


aEnriched uranium

✓


bNatural uranium

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cPlutonium

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dMonazite sand

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View Answer Enriched uranium

Heavy water has maximum density at ______________ °C ?


a4

✖


b11.6

✓


c0

✖


d18.6

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View Answer 11.6

In the nuclear reaction, 93N239→ 94Pu239 + ?; the missing particle is a/an__________________?


aElectron

✓


bProton

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cNeutron

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dPosition

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View Answer Electron

The molecular weight of heavy water is_________________?


a10

✖


b18

✖


c20

✓


d36

✖


View Answer 20

Spent fuel from the nuclear thermal reactor contains__________________?


aFission products

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bPlutonium

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cUnused fuel

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dAll A., B. & C.

✓


View Answer All A., B. & C.

The function of moderators in nuclear reactor is to _________________?


aSlow down the secondary neutrons

✓


bAbsorb the secondary neutrons

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cControl the chain reaction

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dNone of these

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Which of the following undergoes fission reaction easily ?


aU-235

✓


bU-238

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cTh-232

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dNone of these

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View Answer U-235

Which of the following may be used to measure the rate of nuclear disintegration ?


aGeiger-Muller Counter

✓


bCyclotron

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cCold chamber

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dMass spectrograph

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View Answer Geiger-Muller Counter

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