In a binary system, separation is very efficient, when the relative volatility is_______________?
A. 1
B. > 1
C. < 1
D. 0.5
Month: February 2019
Which of the following liquid-vapor contacting devices provides maximum contact surface area for a particular duty ?
Which of the following liquid-vapor contacting devices provides maximum contact surface area for a particular duty ?
A. Sieve plate column
B. Bubble cap column
C. Randomly packed column
D. Wetted wall column
Dryer widely used in a textile industry is ______________ dryer?
Dryer widely used in a textile industry is ______________ dryer?
A. Festoon
B. Cylinder
C. Conveyor
D. Tunnel
Ponchon-Savarit method analyses the fractional equipment based on___________________?
Ponchon-Savarit method analyses the fractional equipment based on___________________?
A. Enthalpy balance only
B. Material balance only
C. Both enthalpy and material balances
D. The assumption of constant molal-overflow
Minimum possible diameter of a packed column is decided mainly by the________________________?
Minimum possible diameter of a packed column is decided mainly by the________________________?
A. Flooding
B. Gas viscosity
C. Liquid density
D. Liquid hold up
For the same process conditions, the reflux ratio of an unlagged distillation column___________________?
For the same process conditions, the reflux ratio of an unlagged distillation column___________________?
A. Decreases in winter
B. Increases in winter
C. Increases in summer
D. None of these
A plait point is the point on the solubility curve, where the tie line reduces to a point. What is the number of plait point for a ternary system containing two pairs of partially miscible liquids ?
A plait point is the point on the solubility curve, where the tie line reduces to a point. What is the number of plait point for a ternary system containing two pairs of partially miscible liquids ?
A. 0
B. 1
C. 2
D. 3
Entrainer used in Azeotropic distillation should____________________?
Entrainer used in Azeotropic distillation should____________________?
A. Form a low boiling azeotrope with one of the constituents of the mixture
B. Form a new azeotrope of low relative volatility with one of the constituents of the mixture
C. Have high latent heat of vaporisation
D. Have high viscosity to provide high tray efficiency
Absorption factor method is used to calculate the number of ideal stages, when_______________________?
Absorption factor method is used to calculate the number of ideal stages, when_______________________?
A. Operating line lies above the equilibrium line
B. Operating line lies below the equilibrium line
C. Both operating and equilibrium lines are parallel
D. Pressure drop in the column is very high
Which of the following same diameter columns gives lowest pressure drop per unit height ?
Which of the following same diameter columns gives lowest pressure drop per unit height ?
A. Bubble-cap column
B. Sieve-plate column
C. Packed column (stacked)
D. Randomly packed column