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Chemical Engineering Basics

Chemical Engineering Basics
The process of removal of scale formed during hot rolling of steel is termed as

Descaling
Skimming
Pickling
Shot blasting

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Chemical Engineering Basics
__________ of hard alloy and tool steel is done to make it easily machinable.

Annealing
Case carburising
Normalising
Tempering

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Chemical Engineering Basics
Frost formation on the evaporator tubes in the domestic refrigerators

Is immaterial
Can be prevented by proper design
Decreased compressor power
Causes heat loss due to poor heat transfer

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Chemical Engineering Basics
A polymer is termed as an 'elastomer', if its percentage elongation is more than 100%. An elastomer is termed as 'rubber' if its percentage elongation is more than __________ percent.

300
200
400
150

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Chemical Engineering Basics
Toughness of a material is measured by the

Notched bar test
Scratch test
Universal testing machine
Vicker's hardness test

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Chemical Engineering Basics
During sensible cooling of air, its wet bulb temperature

Increases & the dew point decreases
Increases but dew point remains constant
Decreases & the dew point increases
Decreases but dew point remains constant

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