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Chemical Engineering Basics

Chemical Engineering Basics
Swaging is a/an __________ operation.

Extrusion
Piercing
Drawing
Forging

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Chemical Engineering Basics
Silicon crystal can be converted to p-type semi-conductor by doping with

Boron
Carbon
Phosphorous
Nitrogen

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Chemical Engineering Basics
For the same heat input & compression ratio, efficiency of Otto cycle is higher than that of diesel cycle, because in Otto cycle.

Heat rejection is lower
Combustion is at constant volume
Expansion & compression are isentropic
Maximum temperature is higher

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Chemical Engineering Basics
Alloys having more than 80% copper are generally more

Machinable
Prone to season cracking
Corrosion resistant
Abrasion resistant

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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.

150
300
200
400

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Chemical Engineering Basics
Lime contains about 90% CaO. Percentage CaO present in limestone is about

80
25
50
70

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