Chemical Engineering MCQs

Page No. 35

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


aIron

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bSilver

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cCalcium

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dAluminium

✓


View Answer Aluminium

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


aStainless steel

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bCast iron

✓


cLead lined steel

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dRubber lined steel

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View Answer Cast iron

White cast iron is not__________________?


aMalleable

✓


bWhitish in color

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cBrittle

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dStrong and hard

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View Answer Malleable

Lead is_____________________?


aNot resistant to corrosion

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bUsed as a cathodic material

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

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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

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bPig iron

✓


cLow carbon steel

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dMild steel

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View Answer Pig iron

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


aRupture strength and hot hardness

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bImpact strength and bonding strength

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cDeformation resistance

✓


dWear resistance

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


aIncreases very quickly

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bDecreases very quickly

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cIncreases in proportion to stress

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dDecreases in proportion to stress

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


aMonel metal

✓


bGun metal

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cWood metal

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dBabbitt metal

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View Answer Monel metal

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


aLead lined stainless steel

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bCast iron

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cSteel or cement-brick lined

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dHard wood

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


aIron & carbon

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bIron & mercury

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cPlatinum & mercury

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dNone of these

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View Answer Iron & carbon

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