Process Equipment and Plant Design In the downcomer of a distillation column, the minimum recommended residence time is about __________ seconds. 2.5 12.5 17.5 5 2.5 12.5 17.5 5 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 5 and 10 300 and 500 180 and 300 45 and 75 5 and 10 300 and 500 180 and 300 45 and 75 ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design In shell and tube heat exchangers, straight tie rods are used to Hold baffle in space Account for thermal strain Fix the tubes in position None of these Hold baffle in space Account for thermal strain Fix the tubes in position None of these ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design In actual operation of a bubble cap distillation tower, the __________ at the bottom of the tower is more than that at the top of the tower. Pressure and temperature Vapour molecular weight Molal flow rate of vapour All of these Pressure and temperature Vapour molecular weight Molal flow rate of vapour All of these ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design 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. Half Equal to One fourth Three fourth Half Equal to One fourth Three fourth ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Overall tray efficiency of a distillation column is the ratio of the number of Overall gas transfer units to the number of ideal trays required Ideal trays required to the number of real trays required Real trays required to the number of ideal trays required None of these Overall gas transfer units to the number of ideal trays required Ideal trays required to the number of real trays required Real trays required to the number of ideal trays required None of these ANSWER DOWNLOAD EXAMIANS APP
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