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Chemical Engineering Basics

Chemical Engineering Basics
Chlorine acts as a bleaching agent only in the presence of

Sunlight
Pure oxygen
Dry air
Moisture

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

Thermal conductivity
Density
Thermal diffusivity
Viscosity

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Chemical Engineering Basics
The most detrimental impurity in high pressure boiler feed water is

Silica
Dissolved salt
Turbidity
Suspended salt

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Chemical Engineering Basics
The best criterion for analysing an economic investment is the

Future value method
Present value method
Rate of return criterion
Salvage value

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Chemical Engineering Basics
On decreasing the grain size of a polycrys-talline material, the property most likely to deteriorate is

Fatigue
Creep
Toughness
Tensile strength

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Chemical Engineering Basics
Toughness of a material is measured by the

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

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