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Process Equipment and Plant Design

Process Equipment and Plant Design
Larger depth of liquid on the trays of a distillation column

Neither A nor B
Both A & B
Leads to high tray efficiency
Results in higher pressure drop per tray

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Process Equipment and Plant Design
The slope of the feed line in distillation opeartion is given by (where, q = fraction of the feed stream that is liquid.)

-q
None of these
-q/(q-1)
-q/(1-q)

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Process Equipment and Plant Design
The equivalent diameter for fluid flow through a channel of constant non-circular cross section of area 'A' is given by (where, P = perimeter of the channel in contact with the fluid)

4 P/A
√A
A/P
4 A/P

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Process Equipment and Plant Design
In a double pipe concentric heat exchanger, the equivalent diameter of annulus for heat transfer would be (where, D₁ and D₂ are I.D. of inner and outer pipes)

None of these
D₂ - D₁
(D₂² - D₁²)/D₁²
(D₂² - D₁²)/D₂²

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Process Equipment and Plant Design
Height of the flights in the rotary drier is in the range of

0.5 to 0.6 d
0.2 to 0.5 d
0.08 to 0.12 d
0.02 to 0.05 d

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Process Equipment and Plant Design
Which tube arrangement in a heat exchanger would facilitate highest heat transfer rate?

Triangular pitch
Heat transfer rate is independent of tube arrangement
Square pitch
Diagonal square pitch

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