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Process Equipment and Plant Design

Process Equipment and Plant Design
In the design of a paddle agitator, the ratio (paddle dia/tank dia) is normally taken as

0.8
0.5
0.25
0.1

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Process Equipment and Plant Design
Cooling water fouling factors vary in the range of 0.001 to 0.003

(kcal/hr. m. °C)⁻¹
(W/m².°K)⁻¹
(kcal/hr.m² .°C)⁻¹
(BTU/hr.ft² . °F)⁻¹

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Process Equipment and Plant Design
1.2 to 3.8 cms is the value of the

All of these
Downcomer liquid seal in case of a balanced tray design
Static submergence in case of a bubble cap tray for column operating under pressure (≥ 1 atm.)
Skirt clearance for bubble caps

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Process Equipment and Plant Design
In inclined long tube vertical evaporators, the tubes are inclined at an angle of

45°
60°
15°
90°

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Process Equipment and Plant Design
Diameter of bubble caps used in high pressure columns is __________ as compared to that used in identical vacuum columns.

Same
Less
Either A or B; no generalisation can be made
More

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Process Equipment and Plant Design
Maximum allowable vapour velocity in a bubble cap tower is determined by the

Diameter of the column
Entrainment considerations
None of these
Vapour density

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