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Chemical Engineering Basics

Chemical Engineering Basics
Tempering of a material does not improve its

Machinability
Internal stress level
Softness
Toughness

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Chemical Engineering Basics
Which of the following contributes maximum as main source of sulphur in the blast furnace charge ?

Iron ore
Coke
Limestone
Sinter

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Chemical Engineering Basics
With increase in steam pressure, its specific volume decreases

Exponentially
Slowly first and then rapidly
Rapidly first and then slowly
Linearly

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Chemical Engineering Basics
Nusselt number is related to the Reynolds number (Re) in turbulent & laminar flow respectively as

Re-0.8, Re0.5
Re0.8, Re0.5
Re0.8, Re-0.5
Re0.5, Re0.8

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Chemical Engineering Basics
At the point of boundary layer separation in fluid flow, the

Velocity gradient is flat
Shear stress is maximum
Density variation is maximum
Shear stress is zero

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Chemical Engineering Basics
Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure.

Face centred cubic (fcc)
Hexagonal close, packed (hcp)
Simple cubic
Body centred cubic (bcc)

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