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.

28

16

38

19

28

16

38

19

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Process Equipment and Plant Design
Lessing ring is formed by the addition of a partition across the centre of a raschig ring, which results in an area increase of about __________ percent.

20

55

5

35

20

55

5

35

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

Downcomer liquid seal in case of a balanced tray design

All of these

Static submergence in case of a bubble cap tray for column operating under pressure (≥ 1 atm.)

Skirt clearance for bubble caps

Downcomer liquid seal in case of a balanced tray design

All of these

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
Back-trapping in a distillation column results due to

Low reflux ratio

Low gas velocity

Excessive liquid gradient over the tray

High gas velocity

Low reflux ratio

Low gas velocity

Excessive liquid gradient over the tray

High gas velocity

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Process Equipment and Plant Design
Width and depth of grooves in the tube sheet holes normally are __________ inch respectively.

1/2 and 5

1/8 and 1/64

1/2 and 8

1/64 and 1/8

1/2 and 5

1/8 and 1/64

1/2 and 8

1/64 and 1/8

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Process Equipment and Plant Design
The function of manholes provided in the shell of a distillation column is to

Keep a check on the liquid gradient over the plate by direct visual observation

Guard against foaming & entrainment by dumping antifoaming agent through it

All of these

Give access to the individual trays for cleaning, maintenance and installation

Keep a check on the liquid gradient over the plate by direct visual observation

Guard against foaming & entrainment by dumping antifoaming agent through it

All of these

Give access to the individual trays for cleaning, maintenance and installation

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Process Equipment and Plant Design

Process Equipment and Plant Design Lessing ring is formed by the addition of a partition across the centre of a raschig ring, which results in an area increase of about __________ percent.

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

Process Equipment and Plant Design Back-trapping in a distillation column results due to

Process Equipment and Plant Design Width and depth of grooves in the tube sheet holes normally are __________ inch respectively.

Process Equipment and Plant Design The function of manholes provided in the shell of a distillation column is to

Process Equipment and Plant Design
Lessing ring is formed by the addition of a partition across the centre of a raschig ring, which results in an area increase of about __________ percent.

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

Process Equipment and Plant Design
Back-trapping in a distillation column results due to

Process Equipment and Plant Design
Width and depth of grooves in the tube sheet holes normally are __________ inch respectively.

Process Equipment and Plant Design
The function of manholes provided in the shell of a distillation column is to