Mass Transfer Can the efficiency of a plate in the distillation tower be greater than 100%? Yes Never Yes ; if the reflux ratio is maximum Normally not; but is possible if infinite number of plates are put Yes Never Yes ; if the reflux ratio is maximum Normally not; but is possible if infinite number of plates are put ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Air initially at 101. 3 kPa and 40°C and with a relative humidity of 50%, is cooled at constant pressure to 30°C. The cooled air has a Higher relative humidity Higher absolute (specific) humidity Higher wet bulb temperature Higher dew point Higher relative humidity Higher absolute (specific) humidity Higher wet bulb temperature Higher dew point ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The surface renewal frequency in Danckwerts model of mass transfer is given by (KL: mass transfer co-efficient) KL²/DA KL/DA² √(KL².DA) KL².DA KL²/DA KL/DA² √(KL².DA) KL².DA ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In batch distillation with constant reflux, overhead product composition __________ with time. Does not vary May increase on decrease, depends on the system Decreases Increases Does not vary May increase on decrease, depends on the system Decreases Increases ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Calcium ammonium nitrate (a fertiliser) is dried in a __________ dryer. Rotary Tunnel Vacuum Tray Rotary Tunnel Vacuum Tray ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer If Rm is the minimum reflux ratio, the optimum reflux ratio may be around __________ Rm. 1.2 to 1.5 3 to 4 2.5 to 3 5 1.2 to 1.5 3 to 4 2.5 to 3 5 ANSWER DOWNLOAD EXAMIANS APP
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