EXAMIANS
In the downcomer of a distillation column, the minimum recommended residence time is about __________ seconds.
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In a thin cylindrical shell, the hoop stress is __________ stress.
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Log mean temperature difference in case of multi-pass shell and tube heat exchanger is always
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The clearance between two tubes in a shell and tube heat exchanger is known as 'ligament', whose minimum value is __________ the outside diameter of the tube, but in no case it should be less than 4.5 mm.
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The thickness of heat transfer plates used in the plate type heat exchanger ranges from __________ mm, pressed in a single piece provided with grooves & corrugations.
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In case of plain carbon steel, butt welded joints are used for shell plate thickness ≤ __________ cms. .
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The circumferential (hoop) stress in a thin walled cylinderical vessel under internal pressure is
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The longitudinal stress induced in a thin walled cylinderical vessel under internal pressure is
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The most common standard size of bubble caps used in industrial operation is
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Stage efficiency for packed tower varies with the
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