Chemical Engineering MCQs

Page No. 79

Addition of _____________ in steel can help in increasing the depth of hardness?


aNickel


bChromium


cVanadium


dTungsten


View Answer Tungsten

Fermenter used in the production of penicillin by deep fermentation process is a ______________ lined steel vessel ?


aRubber


bMonel


cGlass


dNickel


View Answer Glass

Which of the following is an alloy of nickel and copper ?


aHastelloy


bDuriron


cMonel


dInconel


View Answer Monel

Which of the following is not a nickel based alloy ?


aInconel


bHastelloys


cNimonics


dBabbitt metal


View Answer Babbitt metal

Presence of silicon in steel_____________________?


aIs in the form of free Si


bIndicates that steel is not deoxidised properly


cDecreases the blow holes formation tendency in castings


dNone of these



‘Hypersil’ is a ______________ steel?


aHigh speed


bSilicon


cMolybdenum


dTungsten


View Answer Silicon

H2SO4 (< 50% concentration) is corrosive to_________________?


aAluminium, mild steel, stainless steel, concrete & tin


bCopper, cast iron & high silicon iron (14% Si)


cRubber (butyl and hard), silicone rubber & Teflon


dGlass, graphite, porcelain & stoneware



Aluminium alloy is one of the most suitable materials of construction for aircrafts mainly due to its___________________?


aHigh strength to weight ratio


bLow temperature strength properties


cIts ability to be cast, rolled, forged & stamped


dHigh strength and corrosion & oxidation-resistance at elevated temperature



Cast iron has____________________?


aHigh ductility


bHigh malleability


cVery high tensile strength


dIts elastic limit very close to ultimate breaking strength



The most commonly used resin for making reinforced plastic is___________________?


aUnsaturated polyester


bPolypropylene


cPolyurethane


dNylon-6


View Answer Unsaturated polyester

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