______________ closure is the weakest enclosure for cylindrical vessels?

Related Mcqs:

1. For a cylindrical internally pressurised vessel, which of the following closure types would withstand highest pressure, if each closure is of the same material and thickness ?

   A. Hemispherical
   B. Ellipsoidal (2 : 1)
   C. Conical
   D. Flat plate

2. 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

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. ____________ head is the most economical for cylindrical vessels designed for operating at high pressure (> 15 atm.)?

   A. Hemispherical
   B. Dished
   C. Ellipsoidal
   D. Conical

5. Most of the storage vessels/tanks are made cylindrical, because of the fact that a cylinder _________________?

   A. Has greater structural strength
   B. Is easy to fabricate
   C. Both A. and B.
   D. Neither A. nor B.

6. Cylindrical pressure vessels in horizontal condition is generally supported on a ________________ support?

   A. Lug
   B. Skirt
   C. Saddle
   D. Guy wire

7. Cylindrical storage tanks used for the storage of volatile liquids (e.g., naphtha) have ______________ roofs?

   A. Conical
   B. Flat
   C. Floating
   D. Fixed

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. Large process vessels operating under extreme temperature and pressure conditions are normally clad/ lined with materials like stainless steel, aluminium, nickel & its alloys, copper & its alloys and titanium. The cladding thickness is generally about ______________ percent of the total thickness?

   A. 1 to 5
   B. 10 to 20
   C. 30 to 40
   D. 40 to 50

10. The testing pressure of storage tanks and pressure vessels designed as per Indian standard codes should be about ______________ times the design pressure?

    A. 1.5 to 2
    B. 3 to 4
    C. 4 to 5
    D. > 5