A. To increase the residence time of shell side fluid
B. To provide support to the tube bundle
C. To reduce the induced vibration in the tubes
D. To increase the tube side heat transfer co-efficient by inducing turbulence
Related Mcqs:
- 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 - In a shell and tube heat exchanger having square pitch, the shell side equivalent diameter is given by (where, P = pitch, d = outside diameter of the tube) ?
A. 4(P2 – πd2/4)/πd
B. (P2 – rd2/4)/rd
C. 4P2/πd
D. πd/4P2 - If ‘D’ is the inside diameter of the shell of a shell and tube heat exchanger, then the baffle spacing is usually in the range of__________________?
A. D/2 or minimum 2″ to 5D
B. D/5 or minimum 2″ to 5D
C. D/5 or minimum 2″ to D
D. None of these - Minimum recommended baffle spacing in a shell and tube heat exchanger is about (where, D = shell diameter) ?
A. 0.2 D
B. 0.5 D
C. 0.66 D
D. 0.80 D - In a shell and tube heat exchanger, the shortest centre to centre distance between the adjacent tubes is__________________?
A. Called tube pitch
B. Called tube clearance
C. Always less than the diameter of the tube
D. None of these - Minimum baffle spacing recommended in a shell and tube heat exchanger is equal to _____________________?
A. 5 cms
B. 40% of the I.D. of the shell
C. 25 cms
D. I.D. of the shell - 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 - The shell side pressure drop in a shell and tube heat exchanger is maximum for _______________ baffle?
A. Disk and ring
B. Segmental
C. Orifice
D. Independent of the type of - In a shell and tube heat exchanger, triangular pitch arrangement as compared to square pitch arrangement ?
A. Results in higher shell side pressure drop
B. Can accomodate less number of tubes for a given shell diameter
C. Facilitates easier shell side cleaning; hence is more suitable for handling high dirt factor shell
side fluid
D. Creates relatively lower turbulence on the shell side resulting in lower shell side heat transfer
co-efficient - Triangular pitch tube layout as compared to square pitch in a shell and tube heat exchanger________________?
A. Permits the use of less tubes in a given shell diameter
B. Facilitates comparatively easier external cleaning because of large clearance
C. Permits the use of more tubes in a given shell diameter
D. Both B. and C.
