Shell side heat transfer co-efficient in case of square pitch as compared to the triangular pitch under similar condition of fluid flow and tube size is_____________?

Related Mcqs:

1. 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.

2. 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

3. In a shell and tube heat exchanger, the overall heat transfer co-efficient is proportional to the tube side (volumetric flow rate)0.8. This is valid, only when the ratio of the tube side film resistance to the total resistance is almost equal to____________________?

   A. ∞
   B. 1
   C. 20.8
   D. 2

4. 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

5. In a shell and tube heat exchanger having triangular pitch, the shell side equivalent diameter is given by________________?

   A. 4(0.86P2 – πd2/4)/πd
   B. (P2 – πd2/4)/πd
   C. 4(0.86P2 – πd2)/πd
   D. (4P2 + πd2/4)/πd

6. In most of the shell and tube heat exchangers, the tube pitch is generally ______________ the tube diameter?

   A. Less than
   B. 1.25-1.50 times
   C. 2.5 times
   D. one-fourth of

7. Minimum tube pitch recommended for shell and tube heat exchangers is about _______________ times the outside diameter of the tube?

   A. 1.25
   B. 1.75
   C. 2.5
   D. 3.5

8. 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

9. In case of a shell and tube heat exchanger, the minimum shell thickness for carbon steel (inclusive of corrosion allowance) depends on shell diameter and is in the range of ________________ mm?

   A. 3-5
   B. 5-11
   C. 8-15
   D. 12-18

10. The ratio of tube length to shell diameter in case of liquid shell and tube heat exchanger ranges from__________________?

    A. 2 to 3
    B. 3 to 5
    C. 4 to 8
    D. 6 to 12