Process Equipment and Plant Design Back-trapping in a distillation column results due to High gas velocity Low gas velocity Low reflux ratio Excessive liquid gradient over the tray High gas velocity Low gas velocity Low reflux ratio Excessive liquid gradient over the tray ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design In the case of a shell and tube heat exchanger, the logarithmic mean temperature difference Is always more than arithmetic mean value and the geometric mean value Is always less than arithmetic mean value, but more than geometric mean value Is always less than arithmetic average value May be either more or less than geometric mean and arithmetic mean value depending upon whether the flow of stream is co-current or counter-current Is always more than arithmetic mean value and the geometric mean value Is always less than arithmetic mean value, but more than geometric mean value Is always less than arithmetic average value May be either more or less than geometric mean and arithmetic mean value depending upon whether the flow of stream is co-current or counter-current ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design In case of a 'thin' pressure vessel, the ratio of its diameter to wall thickness is > 10 30 < 10 > 20 > 10 30 < 10 > 20 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. 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 2.5 ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Baffles may be eliminated for Low viscosity liquids (< 200 poise) High viscosity liquids (> 600 poise) Large diameter tanks None of these Low viscosity liquids (< 200 poise) High viscosity liquids (> 600 poise) Large diameter tanks None of these ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Floating head heat exchangers are used for the Counter-current heat transfer systems Cases where temperature difference between the shell and the tubes is more (>50°C) Heat transfer between corrosive fluids Co-current heat transfer systems Counter-current heat transfer systems Cases where temperature difference between the shell and the tubes is more (>50°C) Heat transfer between corrosive fluids Co-current heat transfer systems ANSWER DOWNLOAD EXAMIANS APP
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