Related Questions

Indirect contact heat exchangers are preferred over direct contact heat exchangers, because
A Heat transfer co-efficient are high
B There is no risk of contamination
C There is no mist formation
D Cost of equipment is lower
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
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
'Fouling factor' used in the design of a multipass shell and tube heat exchanger is a
A Non-dimensional factor
B Factor of safety
C Conversion factor for individual film heat transfer co-efficient to overall heat transfer co-efficient
D None of these
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 case of a multipass shell and tube heat exchanger, the temperature drop in the fluid
A Is inversely proportional to the resistance across which the drop occurs
B And the wall are proportional to individual resistances
C And the wall is not related
D None of these
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
For a multipass shell and tube heat exchanger, the LMTD correction factor is always
A 1
B > 1
C Between 1 & 2

Next steps