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Process Equipment and Plant Design

Process Equipment and Plant Design
Le/D for fully open globe value may be around

10
75
300
25

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Process Equipment and Plant Design
The most common standard size of bubble caps used in industrial operation is

4" dia cap with 8" dia riser
1" dia cap with 0.5" dia riser
6" dia cap with 4" dia riser
8" dia cap with 1" dia riser

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Process Equipment and Plant Design
Normally, the length to diameter ratio of rotary dryers varies form 4 to 10 and for its economic operation, the number of transfer units (NTU) for such dryers varies from

3.5-5.5
44119
7.5-10.0
1.5-2.5

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Process Equipment and Plant Design
In a multiple effect evaporator system having 'n' effects, the amount of water evaporated per unit surface area in approximately equal to __________ times that in a single effect.

nth
(1/n)th
1.5 nth
0.5 nth

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Process Equipment and Plant Design
Safety valves are provided in chemical equipments to guard against excessive

Noise
Turbulence
Pressure/pressure fluctuation
Temperature

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Process Equipment and Plant Design
The thermal stress in a metallic bar does not depend upon the

Cross-sectional area
Both A & B
Neither A nor B
Changes in temperature

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