In packed towers provided with pall rings liquid redistributors are positioned at heights of every 6 metres or 5-10 times the column diameter, whichever is less. Maximum size of the pall rings should not exceed __________ of the column diameter.

Process Equipment and Plant Design
In packed towers provided with pall rings liquid redistributors are positioned at heights of every 6 metres or 5-10 times the column diameter, whichever is less. Maximum size of the pall rings should not exceed __________ of the column diameter.

1/5-1/10th

1/2 to 1/4th

1/20-1/30th

1/10-1/15th

1/5-1/10th

1/2 to 1/4th

1/20-1/30th

1/10-1/15th

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Process Equipment and Plant Design
To avoid the tearing off the plate of an edge, the margin (i.e., the minimum distance from the centre of the rivet hole to the nearest edge of the plate) should be equal to

0.5 d

2.5 d

1.5 d

D

0.5 d

2.5 d

1.5 d

D

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Process Equipment and Plant Design
Normally, the ratio of the total riser area to the tower cross sectional area (for bubble cap towers of diameter more than 3 ft) is around

0.4-0.6

0.1-0.2

0.35-0.75

0.55-0.85

0.4-0.6

0.1-0.2

0.35-0.75

0.55-0.85

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Process Equipment and Plant Design
Log mean temperature difference in case of multi-pass shell and tube heat exchanger is always

More than arithmetic mean value

Less than arithmetic mean value

Both B & C

More than geometric mean value

More than arithmetic mean value

Less than arithmetic mean value

Both B & C

More than geometric mean value

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Process Equipment and Plant Design
Baffle spacing is generally __________ the I.D. of the shell.

Both B and C

Not greater than

More than

Not less than one fifth of

Both B and C

Not greater than

More than

Not less than one fifth of

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Process Equipment and Plant Design
Power required for agitation depends upon the

Height & properties of the liquid

Agitator type & speed of agitation

Size of agitator & the tank

All of these

Height & properties of the liquid

Agitator type & speed of agitation

Size of agitator & the tank

All of these

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Process Equipment and Plant Design

Process Equipment and Plant Design In packed towers provided with pall rings liquid redistributors are positioned at heights of every 6 metres or 5-10 times the column diameter, whichever is less. Maximum size of the pall rings should not exceed __________ of the column diameter.

Process Equipment and Plant Design To avoid the tearing off the plate of an edge, the margin (i.e., the minimum distance from the centre of the rivet hole to the nearest edge of the plate) should be equal to

Process Equipment and Plant Design Normally, the ratio of the total riser area to the tower cross sectional area (for bubble cap towers of diameter more than 3 ft) is around

Process Equipment and Plant Design Log mean temperature difference in case of multi-pass shell and tube heat exchanger is always

Process Equipment and Plant Design Baffle spacing is generally __________ the I.D. of the shell.

Process Equipment and Plant Design Power required for agitation depends upon the

Process Equipment and Plant Design
In packed towers provided with pall rings liquid redistributors are positioned at heights of every 6 metres or 5-10 times the column diameter, whichever is less. Maximum size of the pall rings should not exceed __________ of the column diameter.

Process Equipment and Plant Design
To avoid the tearing off the plate of an edge, the margin (i.e., the minimum distance from the centre of the rivet hole to the nearest edge of the plate) should be equal to

Process Equipment and Plant Design
Normally, the ratio of the total riser area to the tower cross sectional area (for bubble cap towers of diameter more than 3 ft) is around

Process Equipment and Plant Design
Log mean temperature difference in case of multi-pass shell and tube heat exchanger is always

Process Equipment and Plant Design
Baffle spacing is generally __________ the I.D. of the shell.

Process Equipment and Plant Design
Power required for agitation depends upon the