Chemical Engineering MCQs

Page No. 364

The ratio of atomic radius to its nuclear radius is about___________________?


a105


b108


c1012


d1015


View Answer 105

A moderator _____________ the neutrons?


aSlows down


bAbsorbs


cAccelerates


dReflects


View Answer Slows down

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


aα


bβ


cγ


d D.


View Answer γ

Extraction of uranium from its ore is done by ______________ method?


aChemical


bPyrometallurgical


cPhysical beneficiation


dElectrometallurgical


View Answer Chemical

The most abundant isotope of natural uranium is ___________________?


a92U238


b92U235


c92U234


dNone of these


View Answer 92U238

A boiling water reactor is the one, in which the_______________________?


aCoolant water is allowed to boil in the core of the reactor


bCoolant water, after being heated in the reactor core, generates steam in a boiler


cPressurised water is pumped into the core


dFuel and the coolant are thoroughly mixed to form a homogeneous solution



Heavy water (D2O) in a nuclear reactor serves as a_______________?


aCoolant


bModerator


cBoth A. & B.


dNeutron absorber


View Answer Both A. & B.

The sum of masses of two nuclei produced in nuclear fission compared to the mass of original nucleus is_____________________?


aLess


bMore


cSame


dMuch more


View Answer Less

In a nuclear explosion, the energy is released primarily in the form of _____________ energy?


aPotential


bThermal


cKinetic


dElectrical


View Answer Kinetic

What is the average life of a radioactive atom having a ‘half life period’ of T ?


a1.44 T


b0.144 T


c14.414.4 T


d2T


View Answer 1.44 T

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