Chemical Engineering MCQs

Page No. 35

Which metal is protected by the layer of its own oxide ?


aIron


bSilver


cCalcium


dAluminium


View Answer Aluminium

In the Contact process of sulphuric acid manufacture, 98% acid cooler is made of_____________________?


aStainless steel


bCast iron


cLead lined steel


dRubber lined steel


View Answer Cast iron

White cast iron is not__________________?


aMalleable


bWhitish in color


cBrittle


dStrong and hard


View Answer Malleable

Lead is_____________________?


aNot resistant to corrosion


bUsed as a cathodic material


cNot used as pigment (in its compound forms) for paints


dUsed as a shock absorber (in mattress form) between the foundation and steel framework of skyscraper buildings



Which one is remelted and poured into moulds to get cast iron ?


aWrought iron


bPig iron


cLow carbon steel


dMild steel


View Answer Pig iron

The addition of antimony in tin-based alloys improves its________________?


aRupture strength and hot hardness


bImpact strength and bonding strength


cDeformation resistance


dWear resistance



All materials obey Hooke’s law within elastic limit. When elastic limit is reached, the tensile strain__________________?


aIncreases very quickly


bDecreases very quickly


cIncreases in proportion to stress


dDecreases in proportion to stress



Evaporators used in caustic soda recovery and production plant are made of_______________?


aMonel metal


bGun metal


cWood metal


dBabbitt metal


View Answer Monel metal

Sulphur melting pit in the sulphuric acid plant is made of__________________?


aLead lined stainless steel


bCast iron


cSteel or cement-brick lined


dHard wood



Which of the following pairs of elements may form an alloy ?


aIron & carbon


bIron & mercury


cPlatinum & mercury


dNone of these


View Answer Iron & carbon

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