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

Related Mcqs:

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

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

2. 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

3. 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

4. In a cylindrical vessel subjected to internal pressure, the longitudinal stress ζL and the circumferential stress, ζn are related by___________________?

   A. ζh = 2 ζL
   B. ζh = ζL
   C. ζh = ζL/2
   D. No relation exists

5. 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

6. A cylindrical pressure vessel of volume 6 πm3 has to be designed to withstand a maximum internal pressure of 10 atm. The allowable design stress of the material is 125N/mm2 and corrosion allowance is 2 mm. The thickness of the vessel for a length/diameter ratio of 3 will be close to________________?

   A. 5 mm
   B. 6 mm
   C. 8 mm
   D. 10 mm

7. 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

8. 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

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

   A. Radial
   B. Circumferential tensile
   C. Compressive
   D. Longitudinal

10. In case of a ‘thin’ pressure vessel, the ratio of its diameter to wall thickness is_________________?

    A. < 10
    B. > 10
    C. > 20
    D. 30