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Process Equipment and Plant Design

Process Equipment and Plant Design
Thin spherical shells subjected to internal pressure, develop __________ stresses.

Radial
Neither A nor B
Both A & B
Circumferential

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Process Equipment and Plant Design
Maximum acceptable total liquid gradient over a tray is about __________ mm.

30.5
12.5
45.5
5.5

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Process Equipment and Plant Design
Heat transfer co-efficient for a horizontal condenser as compared to a vertical condenser operating under similar conditions is

Same
About 0.33 times
Less
About 3 times

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Process Equipment and Plant Design
The ratio of down take area to cross-sectional area of the tube, for calendria type evaporator ranges from

1.5 to 2
1 to 1.5
0.5 to 1
2 to 2.5

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Process Equipment and Plant Design
The wall thickness for a large high pressure pipeline is determined by the consideration of the

Forces exerted by static and dynamic action at bends
Circumferential pipewall tension
Temperature stresses
Axial tensile stress in the pipe

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Process Equipment and Plant Design
In a cylinderical vessel subjected to internal pressure, the longitudinal stress σL and the circumferential stress, σh are related by

σh = σL
σh = σL/2
σh = 2 σL
No relation exists

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