Chemical Engineering MCQs

Page No. 822

Hydrogen in liquid steels is dissolved_________________?


aAs tiny gas bubbles


bIn the atomic form


cIn the ionic form


dIn the molecular form


View Answer As tiny gas bubbles

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


a8


b35


c65


d80


View Answer 35

Laser is a device to produce___________________?


aGamma rays


bMicrowaves


cA beam of white light


dA beam of coherent light



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


aAluminium carbide


bTungsten carbide


cNickel carbide


dIron carbide


View Answer Tungsten carbide

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


aKilled


bRimming


cHigh alloy


dNone of these


View Answer High alloy

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


aBallast


bVoltage balancing potentiometric


cSimple current sensitive


dNone of these



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


bJoule/m2


cNewton/m2


dJoule/m


View Answer Joule/m2

The noble metals________________?


aAre exemplified by Na, K and Li


bDo not resist corrosion very strongly


cAre the lowermost in the electro-chemical series of metals


dNone of these



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


aSilicon carbide


bCorundum


cAluminium oxide


dBoron carbide


View Answer Aluminium oxide

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