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Chemical Engineering Basics

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

80
70
50
25

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Chemical Engineering Basics
The phenomenon of strain-ageing is generally experienced with

Cast iron
High carbon steel
Low carbon steel
High manganese steel

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

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

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Chemical Engineering Basics
__________ joint is usually used for joining cast iron pipes mostly used for temporary pipelines, where it may be necessary to dismantle & reassemble the pipeline very frequently.

Flanged
Bell and Spigot
Collar
Expansion

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Chemical Engineering Basics
The predominant mode of heat transfer which takes place from boiler furnace to water walls of a boiler is

Convection
Radiation
Conduction
Both A & B

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Chemical Engineering Basics
__________ of air does not increase with increase in temperature.

Viscosity
Thermal conductivity
Thermal diffusivity
Density

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