For a cylindrical shell, (subject to the thickness of uppermost course being more than the minimum for dia of the tank in question), the thickness of the courses of shell_________________?

Related Mcqs:

1. For a cylindrical vessel of moderate height, the weld joint efficiency for joints parallel to the cylindrical axis is given as 1.0; while for joints along the girth (circumference) it is given as 0.8. In calculating the shell wall thickness using code formula for an internally pressurised cylindrical vessel, what value of weld joint efficiency should be used ?

   A. 0.8
   B. 0.9
   C. 1.0
   D. (0.8)0.5

2. 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

3. Normally, the plate thickness of the bottoms and roofs of vertically cylindrical storage vessels as compared to that of the cylindrical shell is____________?

   A. More
   B. Less
   C. Same
   D. More or less depending upon the pressure & temperature inside the vessel and the nature of
   the fluid contained therein

4. In the design of a paddle agitator, the ratio (paddle dia/tank dia) is normally taken as___________________?

   A. 0.1
   B. 0.8
   C. 0.25
   D. 0.5

5. The ratio, (propeller agitator dia/tank dia) is normally taken as____________________?

   A. 0.15-030
   B. 0.5-0.65
   C. 0.75-0.85
   D. 0.60-0.90

6. 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

7. Cylindrical shell thickness of rotary drier is generally _______________ mm?

   A. 2-3
   B. 18-22
   C. 6-8
   D. 12-15

8. The wall thickness of thin cylindrical shell with hemispherical ends is ______________ that of the spherical ends?

   A. Equal to
   B. More than
   C. Less than
   D. Either B. or C.; depends on maximum permissible internal pressure

9. 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

10. The minimum plate spacing in most of the petroleum refinery distillation columns (of dia > 3 ft) is normally _____________ inches?

    A. 6
    B. 12
    C. 18
    D. 36