Chemical Engineering MCQs

Page No. 116

Which of the following constituents of cast iron is mainly responsible for imparting it an anti-corrosive property ?


aSilicon

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bPhosphorus

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cSulphur

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dNone of these

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View Answer Silicon

Ball bearings are generally made of___________________?


aPlain carbon steel

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bChrome carbon steel

✓


cStainless steel

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dMalleable cast iron

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View Answer Chrome carbon steel

Hardest materials so far found is_________________?


aDiamond

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bGraphite

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cCarborundum

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dPumice stone

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View Answer Diamond

The presence of impurities in iron_________________?


aIncreases its melting point

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bDoes not affect its melting point

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cDecreases its melting point

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dMakes it malleable

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Molybdenum steels containing 0.15 to 0.40% molybdenum___________________?


aAre prone to temper brittleness

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bAre used for automobile parts like gears, axle, shaft, bearings etc.

✓


cHave very poor fatigue resistance

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dDo not contain nickel or chromium or both

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Carbon is present in the uncombined (graphitic) form in case of__________________?


aCast iron

✓


bSteel

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cFerroalloy

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dNone of these

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View Answer Cast iron

Nickel and molybdenum are the basic constituents of___________________?


aHastelloy

✓


bGerman silver

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cInconel

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dSolder

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View Answer Hastelloy

Constantan used in thermocouples is an alloy of___________________?


aIron & copper

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bCopper & aluminium

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cLead & tin

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dNone of these

✓


View Answer None of these

Hydrochloric acid absorber in made of___________________?


aCast iron

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bMild steel

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cKarbate

✓


dStainless steel

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View Answer Karbate

Most suitable material for high pressure vessel operating at 500 atm. and 500° C is__________________?


aMolybdenum stainless steel

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b18/8 stainless steel

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cMild steel

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dHigh silicon iron (14% Si)

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