Chemical Engineering MCQs

Page No. 822

Hydrogen in liquid steels is dissolved_________________?


aAs tiny gas bubbles

✓


bIn the atomic form

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cIn the ionic form

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dIn the molecular form

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View Answer As tiny gas bubbles

Thermal efficiency of an internal combustion engine is around ______________ percent?


a8

✖


b35

✓


c65

✖


d80

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View Answer 35

Laser is a device to produce___________________?


aGamma rays

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bMicrowaves

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cA beam of white light

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dA beam of coherent light

✓



Which of the following is the most wear resistant grade of carbide used for the cutting tools ?


aAluminium carbide

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bTungsten carbide

✓


cNickel carbide

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dIron carbide

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View Answer Tungsten carbide

Basic open hearth furnace (BOF) is not used for producing ______________ steel?


aKilled

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bRimming

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cHigh alloy

✓


dNone of these

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View Answer High alloy

______________ circuit is most commonly used to measure strain with the help of a strain gauge?


aBallast

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bVoltage balancing potentiometric

✓


cSimple current sensitive

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dNone of these

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Co-efficient of performance of a Carnot cycle refrigerator operating between – 23°C and + 27°C is ________________?


a3

✖


b5

✓


c0.5

✖


d1.5

✖


View Answer 5

Unit of surface tension in S.I. unit is_________________?


aWatt/m

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bJoule/m2

✓


cNewton/m2

✖


dJoule/m

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View Answer Joule/m2

The noble metals________________?


aAre exemplified by Na, K and Li

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bDo not resist corrosion very strongly

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cAre the lowermost in the electro-chemical series of metals

✓


dNone of these

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Which of the following is the most suitable abrasive for grinding high tensile strength materials ?


aSilicon carbide

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bCorundum

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cAluminium oxide

✓


dBoron carbide

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View Answer Aluminium oxide

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