Related Questions

For the same heat load and mass flow rate in the tube side of a shell and tube heat exchanger, one may use multipass on the tube side, because it
A Decreases the pressure drop
B Decreases the outlet temperature of cooling medium
C Increases the overall heat transfer coefficient
D None of these
Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is
A Finned tube heat exchanger with air inside and steam outside
B Finned tube heat exchanger with air outside and steam inside
C Shell and tube heat exchanger with air inside tubes and steam on shell side
D Shell and tube heat exchanger with air on shell side and steam inside tubes
In case of a multipass shell and tube heat exchanger, providing a baffle on the shell side __________ the heat transfer rate.
A Increases
B Decreases
C Does not affect
D May increase or decrease, depends on the type of baffle
In a multipass shell and tube heat exchanger, the problem of differential expansion between the shell and tube passes is taken care of by using a
A U-bend
B Floating head tube sheet
C Either A or B
D Neither A nor B
In a multipass shell and tube heat exchanger, tube side return pressure loss is equal to __________ the velocity head.
A Twice
B Four times
C Square root of
D Square of
The ratio of velocity head to tube side return loss in case of a multipass shell and tube heat exchanger is
A 2
B $$\frac{1}{2}$$
C 4
D $$\frac{1}{4}$$
In a multipass shell and tube heat exchanger, the baffles on shell side is primarily provided for
A Reducing scale deposition
B Increasing pressure drop
C Fixing the tubes
D Creating turbulence
In a shell and tube heat exchanger, putting a longitudinal baffle across the shell, forces the shell side fluid to pass __________ through the heat exchanger.
A Once
B Twice
C Thrice
D Four times
Which of the following parameters is increased by use of finned tube in a multipass shell and tube heat exchanger?
A Tube side pressure drop and the heat transfer rate
B Convective heat transfer co-efficient
C Effective tube surface area for convective heat transfer
D All of the above
Shell side pressure drop in a shell and tube heat exchanger does not depend upon the
A Baffle spacing & shell diameter
B Tube diameter & pitch
C Viscosity, density & mass velocity of shell side fluid
D None of these

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