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Process Equipment and Plant Design

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

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Process Equipment and Plant Design
A/an __________ is used for changing the direction of a pipeline.

Disc compensator
Elbow
Flange
Union

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Process Equipment and Plant Design
If a single tube pass heat exchanger is converted to two passes; for the same flow rate, the pressure drop per unit length in tube side will __________ times.

Increase by 1.8
Decrease by 22
None of these
Increase by 21.6

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Process Equipment and Plant Design
In a multipass shell and tube heat exchanger, the baffles on shell side is primarily provided for

Fixing the tubes
Increasing pressure drop
Creating turbulence
Reducing scale deposition

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Process Equipment and Plant Design
Oxygen carrying pipelines in chemical industries are coloured with __________ colour.

Red
Black
Yellow
Blue

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Process Equipment and Plant Design
The circumferential (hoop) stress in a thin walled cylinderical vessel under internal pressure is

pd/4t
pd/2t
pd/3t
pd/t

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