A. Agitated vessels
B. Bubble cap tray towers
C. Perforated sieve tray towers
D. Spray towers
Related Mcqs:
- Which of the following equipments is not used for liquid dispersion ?
A. Wetted wall towers
B. Packed towers
C. Venturi scrubbers
D. Agitated vessels - The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m2/m3)_________________?
A. 500
B. 1200
C. 900
D. 800 - The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m2/m3) ?
A. 500
B. 1200
C. 900
D. 800 - _______________ columns are used for liquid dispersion in a continuous gas phase ?
A. Packed
B. Pulse
C. Bubble cap
D. Sieve plate - Which of the following equipments is not used in liquid-liquid extraction ?
A. Pachuka tank
B. Agitated vessels
C. Centrifugal extractors
D. Packed towers - H2S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H2S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in meters) corresponding to an operating line given by, y = 5x + 0.001 is ______________________?
A. 2.0
B. 1.56
C. 1.0
D. 0.56 - For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG: mass transfer co-efficient, moles/m2, a: interfacial area per unit volume of tower) ?
A. G/(FG . a)
B. FG/(G . a)
C. (G . a)/FG
D. L/(FG . G) - With increase in the liquid flow rate at a fixed gas velocity in a randomly packed counter current gas-liquid absorption column, the gas pressure drop___________________?
A. Decreases
B. Remains unchanged
C. Increases
D. Decreases exponentially - Out of the following gas-liquid contacting devices, for a given set of operating conditions, gas pressure drop is the least in ______________ tower?
A. Wetted wall
B. Bubble cap
C. Perforated tray
D. Packed - Experiments were conducted to determine the flux of a species A in a stagnant medium across a gas-liquid interface. The overall mass transfer co-efficient based on the liquid side for dilute systems for the above was estimated to be 4 × 10-3 kg mole/m2.s. The equilibrium data for the system is given as y = 2x. The flux across the interface (in kg mole/m2 .s) for bulk concentrations of A in gas phase and liquid phase as y = 0.4 and x = 0.01 respectively is _________________________?
A. 5.6 × 10-4
B. 8.5 × 10-4
C. 5.6 × 10-3
D. 8.5 × 10-3
