Related Questions

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
Applying a pressure drop across a capillary results in a volumetric flow rate 'Q' under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is
A $$\frac{{\text{Q}}}{2}$$
B $$\frac{{\text{Q}}}{4}$$
C $$\frac{{\text{Q}}}{8}$$
D $$\frac{{\text{Q}}}{{16}}$$
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
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
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
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
In a dry packed bed, the pressure drop will be changed by increasing the flow rate as
A V1.8
B V-0.8
C V
D V-1
Under conditions of flooding in packed tower, the gas pressure drop
A Decreases rapidly
B Increases rapidly
C Remains constant
D Is maximum
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 = $$\frac{1}{{{{\text{G}}^{0.6}}}}$$
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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