Process Equipment and Plant Design
The function of manholes provided in the shell of a distillation column is to

Give access to the individual trays for cleaning, maintenance and installation
Keep a check on the liquid gradient over the plate by direct visual observation
All of these
Guard against foaming & entrainment by dumping antifoaming agent through it

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

Density of the gas, but is independent of the viscosity of the gas
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

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Process Equipment and Plant Design
The centre to centre distance between two consecutive baffles in a shell and tube heat exchanger is called the baffle pitch or baffle spacing, which is more than 1/5th the I.D. of the shell. Which of the following is not a function of the baffles?

To reduce the induced vibration in the tubes
To increase the residence time of shell side fluid
To provide support to the tube bundle
To increase the tube side heat transfer co-efficient by inducing turbulence

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