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Process Equipment and Plant Design

Process Equipment and Plant Design
Value of Peclet number = ∞, is the representative of

Laminar flow
Complete back mixing
Eddy diffusivity = 0
Plug flow

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Process Equipment and Plant Design
Bubble cap plate column is

A finite stage contactor
A differential stage contactor
A continuous contactor
Used only for distillation, not for absorption

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Process Equipment and Plant Design
__________ of water makes it a widely used coolant in heat exchangers.

Low viscosity
Low corrosiveness
Low dirt factor
High specific heat

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Process Equipment and Plant Design
The diameter of a propeller agitator used in agitation tank ranges from __________ percent of the tank diameter and its peripherial speed is normally 300 to 500 metres/minute.

5 to 10
55 to 75
15 to 30
40 to 50

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Process Equipment and Plant Design
Friction factor for turbulent flow in a new pipe is given by

f = 0.04/NRe0.16
f = 0.22 NRe0.05
f = 25/NRe
f = 16/NRe

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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

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

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