Related Questions

Which of the following gas-liquid contacting devices incurs the least pressure drop for a particular duty?
A Grid tray tower
B Perforated tray tower
C Wetted wall tower
D Bubble cap tower
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
__________ tower is the most suitable gas-liquid contacting device involving highly corrosive fluids.
A Sieve plate
B Packed
C Bubble cap plate
D None of these
Flooding in a vapor-liquid contacting equipment occurs in a tray, when the pressure drop through a tray is __________ the liquid head available in the downcomer.
A Less than
B More than
C Same as
D Very much less
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 = $$\frac{1}{{{{\text{G}}^{0.6}}}}$$
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
In actual operation of a bubble cap distillation tower, the __________ at the bottom of the tower is more than that at the top of the tower.
A Molal flow rate of vapour
B Vapour molecular weight
C Pressure and temperature
D All of the above
Under conditions of flooding in packed tower, the gas pressure drop
A Decreases rapidly
B Increases rapidly
C Remains constant
D Is maximum
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 $$\frac{{\text{Q}}}{{16}}$$
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

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