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Process Equipment and Plant Design

Process Equipment and Plant Design
In case of bubble cap distillation column of diameter greater than 1.2 metres, the cap diameter is roughly about __________ cms.

30
10
35
20

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Process Equipment and Plant Design
For laminar flow (NRe < 2100) in steel pipe, the optimum inside pipe diameter is given by

Di, opt = 3.9 Q0.45 . ρ0.23
Di, opt = 3 Q0.36 ρ0.18
Di, opt = 3 Q0.36 . ρ1.86 μ0.08
Di, opt = 7.6 Q0.36 . ρ0.9

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Process Equipment and Plant Design
Any shell opening greater than 5 cms for a storage tank must be reinforced for reason of

Preventing the local overstressing of the shell around the opening
Reduction of discontinuity in shape at the junction
None of these
Making the joint leak proof

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Process Equipment and Plant Design
At the following point for a given packing and set of fluids, the pressure drop per metre of packed height, with variation in fluid rates and operating pressure

Increases
Remains same
Decreases
May increase or decrease depending upon the solubility of the gas in the liquid

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Process Equipment and Plant Design
The operating pressure drop range in a bag filter is about __________ mm water gauge.

50-150
43961
1500-2500
500-1500

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Process Equipment and Plant Design
An increase in the liquid resistance to interphase mass transfer and a resultant reduction in plate efficiency is caused by

An increase in relatived volatility for rectification columns
Decrease in gas solubility for absorbers
All of these
An increase in liquid viscosity

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