Related Questions

Baffles are provided in a shell and tube heat exchanger to increase the turbulence and velocity of the shell side fluid. Which of the following shaped baffles does not fall in the category of transverse baffle?
A Segmental baffle
B Flat plate extending across the wall
C Disk type baffle
D Helical type baffle
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 shell and tube heat exchanger, baffles are provided on the shell side to
A Improve heat transfer
B Provide support for tubes
C Prevent stagnation of shell side fluid
D All of these
Baffles provided on the shell side of a shell and tube heat exchanger are meant for
A Providing support for the tubes
B Improving heat transfer
C Both A & B
D Preventing the fouling of tubes & stagnation of shell side fluid
In a multipass shell and tube heat exchanger, the shell side cross flow area does not depend upon
A Baffle spacing
B Clearance
C Pitch
D None of these

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