Chemical Engineering MCQs

Page No. 782

Consumable electrodes are used in the ____________________ welding?


aGas

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bArc

✓


cThermit

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dResistance

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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.

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cEmploys minimum quantity of refrigerant

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dConsumer minimum horse power

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


aDryness

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bMoisture content

✓


cCoolness

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dLatent heat

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View Answer Moisture content

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


aSulphur

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bSilicon

✓


cLead

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dPhosphorous

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View Answer Silicon

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


aClamping methods

✓


bElectrodes

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cCurrent

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dFiller material

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View Answer Clamping methods

_________________ can replace tungsten in high speed steel ?


aChromium

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bVanadium

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cCobalt

✓


dMolybdenum

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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

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bMoisture elimination in the inter-stage cooler

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cIncreased volumetric efficiency

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dAll A , B. & C.

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View Answer All A , B. & C.

The cathode in an electrochemical cell always carries____________________?


aNegative charge

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bPositive charge

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cZero charge

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dPositive or negative charge depending upon the nature of the cell

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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)

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cE = G (1 + v)/2

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dE = 2G (1 + 2v)

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View Answer E = 2G (1 + v)

Cold chisel & hammers are made of_________________?


aHigh speed steel

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bHigh carbon steel

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cForged steel

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dMild steel

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View Answer High carbon steel

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