Chemical Engineering MCQs

Page No. 782

Consumable electrodes are used in the ____________________ welding?


aGas


bArc


cThermit


dResistance


View Answer Arc

The most important consideration, while designing the refrigeration system of an aircraft is that the refrigeration system_________________?


aIs as light as possible


bHas very high C.O.P.


cEmploys minimum quantity of refrigerant


dConsumer minimum horse power



Dew point temperature always gives an indication of the __________________ of the moist air ?


aDryness


bMoisture content


cCoolness


dLatent heat


View Answer Moisture content

Addition of ____________________ to steel does not help in improving its machinability?


aSulphur


bSilicon


cLead


dPhosphorous


View Answer Silicon

In electrical resistance welding, distortion results from the use of improper________________?


aClamping methods


bElectrodes


cCurrent


dFiller material


View Answer Clamping methods

_________________ can replace tungsten in high speed steel ?


aChromium


bVanadium


cCobalt


dMolybdenum


View Answer Cobalt

Multistage compression of air as compared to single stage compression offers the advantage of______________?


aPower saving per unit weight of air delivered


bMoisture elimination in the inter-stage cooler


cIncreased volumetric efficiency


dAll A , B. & C.


View Answer All A , B. & C.

The cathode in an electrochemical cell always carries____________________?


aNegative charge


bPositive charge


cZero charge


dPositive or negative charge depending upon the nature of the cell


View Answer Negative charge

Which of the following relationships is correct for relating the three elastic constants of an isotropic elastic material (where, E = Young’s modulus, G = Modulus of rigidity or shear modulus v = Poisson’s ratio) ?


aE = 2G (1 + v)


bE = G (1 + v)


cE = G (1 + v)/2


dE = 2G (1 + 2v)


View Answer E = 2G (1 + v)

Cold chisel & hammers are made of_________________?


aHigh speed steel


bHigh carbon steel


cForged steel


dMild steel


View Answer High carbon steel

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