In a thin cylindrical shell, the hoop stress is ________________ stress?

Related Mcqs:

1. Circumferential (hoop) stress in a thin cylindrical vessel under internal pressure is _____________ the longitudinal stress?

   A. Half
   B. Equal to
   C. Twice
   D. Eight times

2. The circumferential (hoop) stress in a thin walled cylindrical vessel under internal pressure is______________________?

   A. pd/2t
   B. pd/4t
   C. pd/t
   D. pd/3t

3. 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

4. The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the _______________ stress?

   A. Working
   B. Damaging
   C. Allowable
   D. None of these

5. Hoop (circumferential) stress induced in a thin walled ‘Horton Sphere’ used for the storage of liquid ammonia under pressure is____________________?

   A. pD/2T
   B. pD/4T
   C. pD/3T
   D. pD/6T

6. 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

7. 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

8. 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

9. The longitudinal stress induced in a thin walled cylindrical vessel under internal pressure is_________________?

   A. pd/2t
   B. pd/4t
   C. pd/t
   D. pd/8t

10. Longitudinal stress induced in a thin walled cylindrical storage vessel is __________________?

    A. pD/2t
    B. pD/4t
    C. pD/3t
    D. pD/6t