Related Questions

At the same gas flow rate, the pressure drop in a packed tower being irrigated with liquid __________ that in dry packed tower.
A Is greater than
B Is lower than
C Is same as
D Cannot be predicted as data are insufficient
In packed absorption tower, onset of flooding usually occurs at a pressure drop of about __________ mm of water column per metre height of packing.
A 25-50
B 50-75
C 200-250
D 750-1000
Kelly and Chris packed several boxes with books. If Chris packed 60 percent of the total number of boxes, what was the ratio of the number of boxes Kelly packed to the number of boxes Chris packed?
A 1 to 6
B 1 to 4
C 2 to 5
D 2 to 3
Pressure drop through plate tower as compared to that through packed tower, for the same duty will be
A Less
B More
C Equal
D Either A or B; depends on the packing height
Operating velocity in a packed tower is usually __________ the flooding velocity.
A Half
B Twice
C Equal to
D More than
Which of the following factors affect the pressure drop in a co-current gas-liquid absorption packed tower?
A Size, shape, orientation and surface of the packing particles
B Density and viscosity of fluids
C Fluid flow rates
D All of the above
Pressure drop (Δp) and the superficial gas mass velocity (G) in case of packed absorption tower operating in the preloading range are related as
A Δp = G
B Δp = G0.5
C Δp = G2
D Δp = $$\frac{1}{{{{\text{G}}^{0.6}}}}$$
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
Commercial packed scrubbers are normally designed for a pressure drop range of __________ mm water coloumn per metre of packed height.
A 4-8
B 17-34
C 52-68
D 88-105

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