Process Equipment and Plant Design Optimum reflux ratio in a continuous distillation column is determined by the Maximum permissible vapour velocity None of these Total cost consideration (fixed cost of the column plus the cooling water & steam cost) Flooding limit of the column Maximum permissible vapour velocity None of these Total cost consideration (fixed cost of the column plus the cooling water & steam cost) Flooding limit of the column ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design The main purpose of providing stepping on the trays is to Increase the residence time Facilitate handling of large flow rate of liquid Decrease the pressure drop Improve the flow condition Increase the residence time Facilitate handling of large flow rate of liquid Decrease the pressure drop Improve the flow condition ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of (1.2)5/3 (1.2)2/3 (1.2)3/2 (1.2)3/5 (1.2)5/3 (1.2)2/3 (1.2)3/2 (1.2)3/5 ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Excessive liquid gradient on a tray may result in the Gas blowing beneath cap skit Back trapping All of these Maldistribution of gas Gas blowing beneath cap skit Back trapping All of these Maldistribution of gas ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design In a distillation column, bubble caps are located on trays with a pitch of __________ times the outside diameter of the caps. 2.5 1.6 to 2 1.5 to 3 1.3 to 2 2.5 1.6 to 2 1.5 to 3 1.3 to 2 ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Le/D for fully open gate valves would be Around 7 Both B and C Much more than that for fully open globe valves Much less (say 2% than that for fully open globe valves) Around 7 Both B and C Much more than that for fully open globe valves Much less (say 2% than that for fully open globe valves) ANSWER DOWNLOAD EXAMIANS APP
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