Any shell opening greater than 5 cms for a storage tank must be reinforced for reason of ____________________?

Related Mcqs:

1. 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

2. In case of plain carbon steel, butt welded joints are used for shell plate thickness ≤ _____________ cms?

   A. 1.2
   B. 0.5
   C. 3.8
   D. 6.8

3. In case of bubble cap distillation column of diameter greater than 1.2 metres, the cap diameter is roughly about _______________ cms?

   A. 10
   B. 20
   C. 30
   D. 35

4. Column support for the roof of cylindrical storage tank must be provided for___________________?

   A. Small diameter tanks
   B. Large diameter tanks
   C. Small diameter tall tanks
   D. All tanks irrespective of their heights and diameters

5. A certain pressure vessel manufacturer avoids doing reinforcements calculations for openings by always providing a reinforcing pad extending upto double the diameter of the opening and of the same material and thickness as that of the shell wall. If area compensation is accepted as a code guideline, his approach leads to safe design____________________?

   A. Only if the opening is on spherical vessel
   B. Only if the opening is on a vertical cylindrical vessel
   C. Only if the opening is on a horizontal cylindrical vessel
   D. Irrespective of the shape of the vessel

6. 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

7. 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

8. The minimum shell thickness for tank ≤ 15 metres diameter is limited to _______________ mm, for reasons of elastic stability?

   A. 2
   B. 5
   C. 10
   D. 15

9. 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

10. 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