Circumferential (hoop) stress in a thin cylindrical vessel under internal pressure is __________ the longitudinal stress.

Process Equipment and Plant Design
Circumferential (hoop) stress in a thin cylindrical vessel under internal pressure is __________ the longitudinal stress.

Equal to

Twice

Half

Eight times

Equal to

Twice

Half

Eight times

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Process Equipment and Plant Design
Pick out the wrong statement about the design of seive plate column and the bubble cap column.

The downcomer design and the residence time in the downcomer is almost same for seive plate and bubble cap columns

Weir height in case of a bubble cap plate ranges from 50 to 150 mm and is higher than the seive plate

Weir length for a bubble cap plate is the same as that for the seive plate

Weir height for a bubble cap plate column is the same as that for a seive plate column

The downcomer design and the residence time in the downcomer is almost same for seive plate and bubble cap columns

Weir height in case of a bubble cap plate ranges from 50 to 150 mm and is higher than the seive plate

Weir length for a bubble cap plate is the same as that for the seive plate

Weir height for a bubble cap plate column is the same as that for a seive plate column

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Process Equipment and Plant Design
Apex angle of conical heads used in the bottom heads of chemical process equipments is usually

75°

60°

45°

30°

75°

60°

45°

30°

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Process Equipment and Plant Design
Pick out the wrong statement pertaining to shell and tube heat exchanger.

Baffles are supported independently of the tubes by tie rods and positioned by spacers

Tie rods are fixed at one end in the tube sheet by making blind holes and the minimum number of tie rods is 4 with at least 10 mm diameter

Bracket supports are used for horizontal shell, while saddle support is used for vertical shell

Clearance between shell & baffles and between tube & baffles should be minimum to avoid by-passing of the fluid, but it should be enough to permit the removal of tube bundle

Baffles are supported independently of the tubes by tie rods and positioned by spacers

Tie rods are fixed at one end in the tube sheet by making blind holes and the minimum number of tie rods is 4 with at least 10 mm diameter

Bracket supports are used for horizontal shell, while saddle support is used for vertical shell

Clearance between shell & baffles and between tube & baffles should be minimum to avoid by-passing of the fluid, but it should be enough to permit the removal of tube bundle

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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.

16

28

19

38

16

28

19

38

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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.

1/2 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

1/5-1/10th

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Process Equipment and Plant Design

Process Equipment and Plant Design Circumferential (hoop) stress in a thin cylindrical vessel under internal pressure is __________ the longitudinal stress.

Process Equipment and Plant Design Pick out the wrong statement about the design of seive plate column and the bubble cap column.

Process Equipment and Plant Design Apex angle of conical heads used in the bottom heads of chemical process equipments is usually

Process Equipment and Plant Design Pick out the wrong statement pertaining to shell and tube heat exchanger.

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
Circumferential (hoop) stress in a thin cylindrical vessel under internal pressure is __________ the longitudinal stress.

Process Equipment and Plant Design
Pick out the wrong statement about the design of seive plate column and the bubble cap column.

Process Equipment and Plant Design
Apex angle of conical heads used in the bottom heads of chemical process equipments is usually

Process Equipment and Plant Design
Pick out the wrong statement pertaining to shell and tube heat exchanger.

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.