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


bPhosphorus


cSulphur


dNone of these


View Answer Silicon

Ball bearings are generally made of___________________?


aPlain carbon steel


bChrome carbon steel


cStainless steel


dMalleable cast iron


View Answer Chrome carbon steel

Hardest materials so far found is_________________?


aDiamond


bGraphite


cCarborundum


dPumice stone


View Answer Diamond

The presence of impurities in iron_________________?


aIncreases its melting point


bDoes not affect its melting point


cDecreases its melting point


dMakes it malleable



Molybdenum steels containing 0.15 to 0.40% molybdenum___________________?


aAre prone to temper brittleness


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


cHave very poor fatigue resistance


dDo not contain nickel or chromium or both



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


aCast iron


bSteel


cFerroalloy


dNone of these


View Answer Cast iron

Nickel and molybdenum are the basic constituents of___________________?


aHastelloy


bGerman silver


cInconel


dSolder


View Answer Hastelloy

Constantan used in thermocouples is an alloy of___________________?


aIron & copper


bCopper & aluminium


cLead & tin


dNone of these


View Answer None of these

Hydrochloric acid absorber in made of___________________?


aCast iron


bMild steel


cKarbate


dStainless steel


View Answer Karbate

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


aMolybdenum stainless steel


b18/8 stainless steel


cMild steel


dHigh silicon iron (14% Si)



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