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 Increase by 21.6 None of these TRUE ANSWER : ? YOUR ANSWER : ?
In a shell and tube heat exchanger, the overall heat transfer co-efficient is proportional to the tube side (volumetric flow rate)0.8. This is valid, only when the ratio of the tube side film resistance to the total resistance is almost equal to 20.8 ∞ 2 1 TRUE ANSWER : ? YOUR ANSWER : ?
Maximum acceptable total liquid gradient over a tray is about __________ mm. 30.5 45.5 12.5 5.5 TRUE ANSWER : ? YOUR ANSWER : ?
Diameter of bubble caps used in high pressure columns is __________ as compared to that used in identical vacuum columns. Less Either A or B; no generalisation can be made More Same TRUE ANSWER : ? YOUR ANSWER : ?
Stage efficiency for packed tower varies with the All of these Fluid rates and fluid properties Operating pressure and column diameter Type & size of packing TRUE ANSWER : ? YOUR ANSWER : ?
In case of a continuous distillation column, increase in reflux ratio may result in the Greater cost for the reboiler heat supply Lower fixed charges for the column Greater cost for the condenser coolant All of these TRUE ANSWER : ? YOUR ANSWER : ?
Larger depth of liquid on the trays of a distillation column Results in higher pressure drop per tray Leads to high tray efficiency Both A & B Neither A nor B TRUE ANSWER : ? YOUR ANSWER : ?
Reflux ratio variation in a distillation column is between Zero and infinity None of these Zero and one Minimum and infinity TRUE ANSWER : ? YOUR ANSWER : ?
The raio, (properller agitator dia/tank dia) is normally taken as 0.15-030 0.60-0.90 0.75-0.85 0.5-0.65 TRUE ANSWER : ? YOUR ANSWER : ?
Power required for agitation depends upon the Height & properties of the liquid All of these Agitator type & speed of agitation Size of agitator & the tank TRUE ANSWER : ? YOUR ANSWER : ?