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Process Equipment and Plant Design

Process Equipment and Plant Design
__________ shaped roof is most commonly used for cylindrical tanks.

Flat
Umbrella
Cone
Dome

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Process Equipment and Plant Design
Maximum size of the raschig rings used in a packed tower is about __________ of the coloumn diameter.

1/30th
1/20th
1/10th
1/50th

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Process Equipment and Plant Design
The ratio of down take area to cross-sectional area of the tube, for calendria type evaporator ranges from

0.5 to 1
2 to 2.5
1 to 1.5
1.5 to 2

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Process Equipment and Plant Design
In a continuous distillation column, the optimum reflux ratio ranges from __________ times the minimum reflux ratio.

2.2 to 2.6
1.1 to 1.5
1.6 to 2
2.7 to 3

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Process Equipment and Plant Design
The absorption factor is defined as (where, S₁ = slope of the equilibrium curve, S₂ = slope of the operating line)

S₂/S₁
S₁.S₂
S₁/S₂
1/S₁.S₂

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Process Equipment and Plant Design
Le/D for 90° elbow (medium radius) and 90°square elbow would be respectively around

3 and 5
25 and 60
100 and 250
250 and 600

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