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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