Tube wall thickness depends on the cor-rosiveness of the fluids and their operating pressure & temperature and is specified by Birmingham wire gauge (B.W.G)-a number which varies from 8 to 18 with the numbers 14 and 16 being more commonly used. Outside diameter of tubes varies from about 15 to 50 mm; however a tube of less than __________ mm outside diameter is generally not recommended for fouling fluids.

Process Equipment and Plant Design
Tube wall thickness depends on the cor-rosiveness of the fluids and their operating pressure & temperature and is specified by Birmingham wire gauge (B.W.G)-a number which varies from 8 to 18 with the numbers 14 and 16 being more commonly used. Outside diameter of tubes varies from about 15 to 50 mm; however a tube of less than __________ mm outside diameter is generally not recommended for fouling fluids.

38

28

16

19

38

28

16

19

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Process Equipment and Plant Design
Liquid gradient over the tray results due to the

Low gas velocity

Large reflux ratio

Resistance offered to flow of liquids by caps & risers and the flow of gas

Large plate spacing

Low gas velocity

Large reflux ratio

Resistance offered to flow of liquids by caps & risers and the flow of gas

Large plate spacing

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Process Equipment and Plant Design
In common bubble cap distillation column design practice, riser area is approximately equal to (where, Aa = Annular passage area, and Sa = Slot area)

Sa = 1.5 Aa

Aa = Sa

1.2 Aa = 1.2 Sa

Aa = 1.5 Sa

Sa = 1.5 Aa

Aa = Sa

1.2 Aa = 1.2 Sa

Aa = 1.5 Sa

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Process Equipment and Plant Design
Baffles may be eliminated for

None of these

Large diameter tanks

High viscosity liquids (> 600 poise)

Low viscosity liquids (< 200 poise)

None of these

Large diameter tanks

High viscosity liquids (> 600 poise)

Low viscosity liquids (< 200 poise)

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Process Equipment and Plant Design
Overall mass transfer co-efficient in case of absorption of __________ in water is based on the gas film co-efficient only, as the mass transfer process is gas film (phase) controlling.

CO₂

NH₃

None of these

SO₂

CO₂

NH₃

None of these

SO₂

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Process Equipment and Plant Design
Tube side heat transfer co-efficient for turbulent flow of liquid through tubes is proportional to

G0.2

G0.8

G1.5

G0.5

G0.2

G0.8

G1.5

G0.5

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Process Equipment and Plant Design

Process Equipment and Plant Design Liquid gradient over the tray results due to the

Process Equipment and Plant Design In common bubble cap distillation column design practice, riser area is approximately equal to (where, Aa = Annular passage area, and Sa = Slot area)

Process Equipment and Plant Design Baffles may be eliminated for

Process Equipment and Plant Design Overall mass transfer co-efficient in case of absorption of __________ in water is based on the gas film co-efficient only, as the mass transfer process is gas film (phase) controlling.

Process Equipment and Plant Design Tube side heat transfer co-efficient for turbulent flow of liquid through tubes is proportional to

Process Equipment and Plant Design
Liquid gradient over the tray results due to the

Process Equipment and Plant Design
In common bubble cap distillation column design practice, riser area is approximately equal to (where, Aa = Annular passage area, and Sa = Slot area)

Process Equipment and Plant Design
Baffles may be eliminated for

Process Equipment and Plant Design
Overall mass transfer co-efficient in case of absorption of __________ in water is based on the gas film co-efficient only, as the mass transfer process is gas film (phase) controlling.

Process Equipment and Plant Design
Tube side heat transfer co-efficient for turbulent flow of liquid through tubes is proportional to