Chemical Engineering MCQs

Page No. 92

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


aHardness & brittleness increases

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bDuctility decreases

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cBoth A. and B.

✓


dNeither A. nor B.

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View Answer Both A. and B.

Which is an amorphous material ?


aGlass

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bMica

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cBrass

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dCast iron

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View Answer Glass

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


a-273

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b0

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c -78

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d5

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View Answer -78

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


aPlain carbon steel

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bStainless steel

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cRubber or durmet-20 lined

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dLead

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Which of the following is not a common refrigerant ?


aFreon-12

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bEthylene

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cAmmonia

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dCarbon dioxide

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View Answer Ethylene

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


a80

✓


b70

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c90

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d50

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View Answer 80

The energy of activation of exothermic reaction is_________________?


aZero

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bNegative

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cVery large compared to that for endothermic reaction

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dNot possible to predict

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


aPrecipitation

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bFusion

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cSintering

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dAgglomeration

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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

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b28.3

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c273

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d283

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View Answer 28.3

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


aCast iron

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bStainless steel

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cKarbate

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dLead lined steel

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View Answer Cast iron

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