Process Equipment and Plant Design A minimum clearance of about __________ mm is maintained between the distillation column wall and the bubble cap. 95 19 38 76 95 19 38 76 ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Larger depth of liquid on the trays of a distillation column Neither A nor B Results in higher pressure drop per tray Both A & B Leads to high tray efficiency Neither A nor B Results in higher pressure drop per tray Both A & B Leads to high tray efficiency ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design A high vapour velocity is required for high plate efficiency in a seive plate coloumn. The satisfactory value of operating vapor velocity for design purpose in seive plate column is about __________ percent of the flooding velocity. 60 45 80 95 60 45 80 95 ANSWER DOWNLOAD EXAMIANS APP
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. 1/20-1/30th 1/5-1/10th 1/10-1/15th 1/2 to 1/4th 1/20-1/30th 1/5-1/10th 1/10-1/15th 1/2 to 1/4th ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Pressure drop due to pipe fittings can be estimated by the equation, ΔP/p = 4f.Le/D.V2/2gc, where, Le = equivalent length of straight pipeline which will incur the same frictional loss as the fitting and D = diameter of the fitting. The value of Le/D (dimensionless) for 45° elbow and 180° close return bends would be respectively around 180 and 300 45 and 75 5 and 10 300 and 500 180 and 300 45 and 75 5 and 10 300 and 500 ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Back-trapping in a distillation column results due to Low gas velocity Low reflux ratio High gas velocity Excessive liquid gradient over the tray Low gas velocity Low reflux ratio High gas velocity Excessive liquid gradient over the tray ANSWER DOWNLOAD EXAMIANS APP
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