A. Increase the heating load
B. Impart structural strength
C. Account for the uneven expansion of shell and tube bundles
D. Facilitate increase of shell length, if needed
Related Mcqs:
- 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 - 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 - The advantage of using a 1 – 2 shell and tube heat exchanger over a 1 – 1 shell and tube heat exchanger is_________________?
A. Lower tube side pressure drop
B. Lower shell side pressure drop
C. Higher tube side heat transfer co-efficient
D. Higher shell side heat transfer co-efficient - Steam is to be condensed in a shell and tube heat exchanger, 5 m long with a shell diameter of 1 m. Cooling water is to be used for removing the heat. Heat transfer co-efficient for the cooling water, whether on shell side or tube side is the same. The best arrangement is_____________?
A. Vertical heat exchanger with steam on tube side
B. Vertical heat exchanger with steam on shell side
C. Horizontal heat exchanger with steam on tube side
D. Horizontal heat exchanger with steam on shell side - 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 - LMTD correction factor which is to be applied for a cross-flow heat exchanger increases with increase in the number of shell passes. Its value for a single pass cross flow heat exchanger is __________________?
A. 0
B. 1
C. > 1
D. < 1 - In a shell and tube heat exchanger, the shell side fluid velocity can‟t be changed by changing the_________________?
A. Tube layout
B. Tube diameter
C. Tube pitch
D. Number of baffles - If the baffle spacing in a shell and tube heat exchanger increases, then the Reynolds number of the shell side fluid_________________?
A. Remains unchanged
B. Increases
C. Increases or decreases depending on number of shell passes
D. Decreases - In a shell and tube heat exchanger, the height of 25 percent cut baffles is equal to (where, D = inside diameter of shell) ?
A. 0.25 D
B. 0.50 D
C. 0.75 D
D. None of these - Baffles in the shell side of a shell and tube heat exchanger ?
A. Increase the cross-section of the shell side liquid
B. Force the liquid to flow parallel to the bank
C. Increase the shell side heat transfer co-efficient
D. Decrease the shell side heat transfer co-efficient
