Chemical Engineering MCQs

Page No. 92

With increase in carbide/graphite ratio in cast iron, its__________________?


aHardness & brittleness increases


bDuctility decreases


cBoth A. and B.


dNeither A. nor B.


View Answer Both A. and B.

Which is an amorphous material ?


aGlass


bMica


cBrass


dCast iron


View Answer Glass

Sublimation temperature of dry ice (solid CO2) is ____________ °C?


a-273


b0


c -78


d5


View Answer -78

Ammonium chloride solution is stored/ treated in _____________ vessels/pipes?


aPlain carbon steel


bStainless steel


cRubber or durmet-20 lined


dLead



Which of the following is not a common refrigerant ?


aFreon-12


bEthylene


cAmmonia


dCarbon dioxide


View Answer Ethylene

In order to be called steel, an alloy should have iron percentage greater than____________________?


a80


b70


c90


d50


View Answer 80

The energy of activation of exothermic reaction is_________________?


aZero


bNegative


cVery large compared to that for endothermic reaction


dNot possible to predict



The process of heating the cold pressed metallic powder is called ______________ in powder metallurgy?


aPrecipitation


bFusion


cSintering


dAgglomeration


View Answer Sintering

A gas has a volume of 27.3 c.c. at 0°C. Its volume at 10°C (if pressure remains unchanged) will be _____________ c.c?


a2.73


b28.3


c273


d283


View Answer 28.3

The carbonating tower used in Solvay process of soda ash manufacture is made of_________________?


aCast iron


bStainless steel


cKarbate


dLead lined steel


View Answer Cast iron

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