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Process Equipment and Plant Design

Process Equipment and Plant Design
Commercial packed scrubbers are normally designed for a pressure drop range of __________ mm water coloumn per metre of packed height.

17-34
88-105
43929
52-68

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Process Equipment and Plant Design
Elastic failure of a material occurs, when the tensile stress equals yield strength, yield point or the elastic limit. Also, the elastic failure occurs according to maximum strain theory, when the maximum tensile strain equals (where, σ = yield strength and E = modulus of elasticity)

E
E/σ
Σ
Σ/E

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Process Equipment and Plant Design
The retention time of material in a rotary dryer depends upon its

All of these
Flights arrangement
Rpm
Slope & length

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Process Equipment and Plant Design
In a distillation column, the minimum residence time for liquid in the downspout is about __________ seconds.

1
180
80
8

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Process Equipment and Plant Design
Log mean temperature difference in case of multi-pass shell and tube heat exchanger is always

More than geometric mean value
Both B & C
More than arithmetic mean value
Less than arithmetic mean value

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Process Equipment and Plant Design
Brass valves are usually made for pipe sizes __________ inches.

>3.5
>2.5
?1
?2

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