Process Equipment and Plant Design
In a bag filter, the pressure drop increases directly as the

Density of the gas and inversely as viscosity of the gas
Viscosity of the gas and inversely as density of the gas
None of these
Density of the gas, but is independent of the viscosity of the gas

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Process Equipment and Plant Design
High pressure fluid in a shell and tube heat exchanger should preferably be routed through the

Tubes to avoid the expansion of high pressure shell construction
Shell side for smaller total pressure drop
Shell side, if the flow is counter-current and tube side if the flow is co-current
Shell side for large overall heat transfer co-efficient

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Process Equipment and Plant Design
Which of the following is not a valid assumption in continuous binary distillation for calculating the number of equilibrium stages by Mc-Cabe-Thiele's method?

Reflux is not a saturated liquid
Sensible heat changes for vapour & liquid are negligibly small
Molar latent heat of the two components are equal
Heat of mixing of normal liquid is assumed to be zero

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Process Equipment and Plant Design
Pick out the wrong statement pertaining to a shell and tube heat exchanger.

The maximum unsupported tube span is generally about 75 times tube diameter, but is reduced to about 60 times for aluminium, copper & alloys of these
The minimum value of baffle spacing is 50 mm
The maximum value of baffle spacing is equal to the I.D. of the shell
Disk and doughnut baffle is the most commonly used baffle

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