Chemical Engineering MCQs

Page No. 34

Pipes for bi-cycle frames are made of _____________ steel?


aHot rolled


bChrome carbon


cCold rolled


dStainless


View Answer Cold rolled

Fatigue strength of a material increases by_____________________?


aHaving notches in the specimen


bRise in temperature


cUnder stressing the specimen


dHaving scratches on the surface



An elastic behaviour of materials is expressed in terms of_______________?


aHysteresis loop area


bStress-strain curve


cRelaxation time


dNone of these


View Answer Relaxation time

The formation of oxide film on a metal due to atmospheric exposure reduces its____________?


aToughness


bStiffness


cCreep limit


dAll A., B. & C.


View Answer Creep limit

Which of the following would not be a suitable material of construction for handling aqueous hydrofluoric acid (HF) at 100°C ?


aMonel


bStainless steel


cGraphite


dKel-F and Teflon


View Answer Stainless steel

Most suitable material of construction for the storage of concentrated nitric acid is__________________?


aCast iron


bCast iron


cKarbate


dAluminium or chromium alloys (Cr > 18% for cold acid)



A suitable material of construction to use with fuming sulphuric acid is_________________?


aCarbon steel


bStainless steel type 304


cNickel


dMonel


View Answer Monel

Steel tower used for the storage of oleum________________?


aIs lined with lead


bNeed not be lined


cIs lined with rubber


dIs lined with acid-proof bricks


View Answer Need not be lined

Nickel made/clad equipments are suitable for handling________________?


aAmmonia (both aqueous & anhydrous)


bFruit juices, milk & its products and caustic soda solution


cNitric acid & hydrochloric acid (concentrated)


dSulphuric acid (concentrated)



Aluminium as a material of construction suffers from the disadvantage of__________________?


aVery high cost


bRather low tensile strength


cVery low strength to weight ratio


dScarce availability



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