Related Questions

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 $$\frac{{\text{Q}}}{{16}}$$
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 in packed bed for turbulent flow is given by the __________ equation.
A Kozney-Karman
B Blake-Plummer
C Leva's
D Hagen-Poiseulle's
Pressure drop in a fluidised bed reactor is __________ that in a similar packed bed reactor.
A Less than
B More than
C Same as
D None of these
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
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
Which of the following equations is valid for laminar flow of a fluid through packed bed?
A Fanning equation
B Kozney - Karman equation
C Hagen - Poiseuille equation
D Blake - Plummer equation
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
Smaller sized packings are generally dumped to the packed columns, and the large ones of size greater than __________ mm are stacked individually, which provides better control over bed porosity and offers lower gas pressure drop.
A 25
B 50
C 75
D 150
For liquid flow through a packed bed, the superficial velocity as compared to average velocity through the channel in the bed is
A More
B Less
C Equal
D Independent of porosity

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