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Process Equipment and Plant Design

The wall thickness of thin cylindrical shell with hemispherical ends is ______________ that of the spherical ends?

Process Equipment and Plant Design /
The wall thickness of thin cylindrical shell with hemispherical ends is ______________ that of the spherical ends?

A. Equal to
B. More than
C. Less than
D. Either B. or C.; depends on maximum permissible internal pressure

The wall thickness of thin cylindrical shell with hemispherical ends is ______________ that of the spherical ends? Read More »

Process Equipment and Plant Design

In a shell and tube heat exchanger, the overall heat transfer co-efficient is proportional to the tube side (volumetric flow rate)0.8. This is valid, only when the ratio of the tube side film resistance to the total resistance is almost equal to____________________?

Process Equipment and Plant Design /
In a shell and tube heat exchanger, the overall heat transfer co-efficient is proportional to the tube side (volumetric flow rate)0.8. This is valid, only when the ratio of the tube side film resistance to the total resistance is almost equal to____________________?

A. ∞
B. 1
C. 20.8
D. 2

In a shell and tube heat exchanger, the overall heat transfer co-efficient is proportional to the tube side (volumetric flow rate)0.8. This is valid, only when the ratio of the tube side film resistance to the total resistance is almost equal to____________________? Read More »

Process Equipment and Plant Design

A certain pressure vessel manufacturer avoids doing reinforcements calculations for openings by always providing a reinforcing pad extending upto double the diameter of the opening and of the same material and thickness as that of the shell wall. If area compensation is accepted as a code guideline, his approach leads to safe design____________________?

Process Equipment and Plant Design /
A certain pressure vessel manufacturer avoids doing reinforcements calculations for openings by always providing a reinforcing pad extending upto double the diameter of the opening and of the same material and thickness as that of the shell wall. If area compensation is accepted as a code guideline, his approach leads to safe design____________________?

A. Only if the opening is on spherical vessel
B. Only if the opening is on a vertical cylindrical vessel
C. Only if the opening is on a horizontal cylindrical vessel
D. Irrespective of the shape of the vessel

A certain pressure vessel manufacturer avoids doing reinforcements calculations for openings by always providing a reinforcing pad extending upto double the diameter of the opening and of the same material and thickness as that of the shell wall. If area compensation is accepted as a code guideline, his approach leads to safe design____________________? Read More »

Process Equipment and Plant Design

Mc Cable Thiele method used for finding theoretical stages in a distillation column assumes that the_____________________?

Process Equipment and Plant Design /
Mc Cable Thiele method used for finding theoretical stages in a distillation column assumes that the_____________________?

A. Sensible heat differences are small, because the temperature changes from tray to tray is small
B. Trouton’s rule is applicable
C. Liquid/vapor loading across the column remains constant
D. All A., B. and C.

Mc Cable Thiele method used for finding theoretical stages in a distillation column assumes that the_____________________? Read More »

Process Equipment and Plant Design

Typical static submergence for bubble cap plate column operating at atmospheric pressure may be around _________________?

Process Equipment and Plant Design /
Typical static submergence for bubble cap plate column operating at atmospheric pressure may be around _________________?

A. 2.5″
B. 0.5″
C. 5″
D. 50% of the plate spacing

Typical static submergence for bubble cap plate column operating at atmospheric pressure may be around _________________? Read More »

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 /
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 ____________________?

A. 0.5 d
B. d
C. 1.5 d
D. 2.5 d

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 ____________________? Read More »

Process Equipment and Plant Design

When one of the fluids is highly corrosive and has fouling tendency, it should_____________________?

Process Equipment and Plant Design /
When one of the fluids is highly corrosive and has fouling tendency, it should_____________________?

A. Preferably flow inside the tube for its easier internal cleaning
B. Preferably flow outside the tube
C. Flow at a very slow velocity
D. Flow outside the tube, when the flow is counter-current and inside the tube when the flow is
co-current

When one of the fluids is highly corrosive and has fouling tendency, it should_____________________? Read More »

Process Equipment and Plant Design