Chemical Engineering MCQs

Page No. 369

The disintegration rate of a radioactive element _______________?


aProgressively increases


bProgressively decreases


cRemains constant throughout


dMay increase or decrease depending on the material



The phenomenon of nuclear fission is opposite to that of__________________?


aRadioactive decay


bThermionic emission


cNuclear fusion


dCombustion


View Answer Nuclear fusion

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


aEnriched uranium


bNatural uranium


cPlutonium


dMonazite sand


View Answer Enriched uranium

Heavy water has maximum density at ______________ °C ?


a4


b11.6


c0


d18.6


View Answer 11.6

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


aElectron


bProton


cNeutron


dPosition


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


bPlutonium


cUnused fuel


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


cControl the chain reaction


dNone of these



Which of the following undergoes fission reaction easily ?


aU-235


bU-238


cTh-232


dNone of these


View Answer U-235

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


aGeiger-Muller Counter


bCyclotron


cCold chamber


dMass spectrograph


View Answer Geiger-Muller Counter

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