A. Withstand higher pressure for a given metallic shell thickness
B. Be fabricated very easily
C. Be designed without wind load considerations
D. Be supported very easily
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Related Mcqs:
- 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 - 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 - Thin spherical shells subjected to internal pressure, develop ______________ stresses?
A. Radial
B. Circumferential
C. Both A. & B.
D. Neither A. nor B. - 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 - In a pressure vessel containing multiple openings of various dimensions at different parts, stress concentration at the edges of the opening is maximum which becomes negligibly small beyond the area covered by ______________ times the hole diameter?
A. Two
B. Five
C. Ten
D. Twenty - Poisson’s ratio of a material is the ratio of unit lateral strain to the unit axial elongation within its elastic limit. The value of Poisson’s ratio for structural and pressure vessel steel may be taken as ____________________?
A. 0.01
B. 0.3
C. 0.75
D. 0.95 - 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 - A pressure vessel is said to be made of ‘thick’ shell, if the ratio of its diameter to wall thickness is_______________?
A. < 10
B. > 10
C. > 20
D. < 20 - Which of the following material is seldom used for pressure vessel construction ?
A. Rimmed still
B. Mild steel
C. Killed steel
D. Semi-killed steel - 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
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