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Chemical Engineering Basics

Chemical Engineering Basics
Tempering of a material does not improve its

Internal stress level
Machinability
Softness
Toughness

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Chemical Engineering Basics
Unit of viscosity in CGS system is

Gm . cm² . sec⁻²
Gm .cm⁻¹ sec⁻¹
Gm . cm . sec⁻¹
Gm .cm⁻², sec⁻¹

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Chemical Engineering Basics
Ultimate strength in tension as compared to that in shear for steel is

One third
Half
One and half times
One fourth

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Chemical Engineering Basics
Materials having __________ lattice structure are usually the most ductile.

Body centred cubic (bcc)
Hexagonal close packed (hcp)
None of these
Face centred cubic (fcc)

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Chemical Engineering Basics
Pick out the wrong statement. If the net positive suction head (NPSH) requirement of a pump is not satisfied, then

It will deliver low discharge of liquid
Its efficiency will not be affected
It will not develop sufficient head to raise water
It will be cavitated

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Chemical Engineering Basics
Lead is added to 60:40 brass primarily to improve

Fluidity
Machinability
Strength
Corrosion resistance

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