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SSC JE 2019 - 20 Thin Pressure Vessel
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Question 1
For a thin spherical shell subjected to internal pressure, the ratio of volumetric strain to diametrical strain is ___________.
Question 2
A thin walled spherical shell is subjected to an internal pressure. If the radius of the shell is increased by 1% and the thickness is reduced by 1%, with the internal pressure remaining the same, the percentage change in the circumferential (hoop) stress is
Question 3
A thin cylindrical vessel of 3.2 m diameter and 5 m long is subjected to a circumferential tensile stress of 140 N/mm2 and axial tensile stress of 70 N/mm2. If the volumetric strain of the vessel is 14×10-4, then the Poisson’s ratio of the material will be (Neglect the compressive stress on the walls and take E = 2×105 N/mm2)
Question 4
A cylindrical tank with closed ends is filled with compressed air at a pressure of 500 kPa. The inner radius of the tank is 2 m. and it has wall thickness of 10 mm. The magnitude of maximum in-plane shear stress (in MPa) is __________.
Question 5
The design of thin cylindrical shells is based on _____.
Question 6
What is the ratio of volumetric strain of a thin cylinder to that of a thin spherical shell having the same internal pressure, same material and same internal diameter and thickness of spherical is twice that of cylindrical? [Take poisson’s ratio = 0.4]
Question 7
The ratio of hoop stress to longitudinal stress in thin walled cylinders is:
Question 8
A thin cylindrical pressure vessel of diameter 800 mm and wall thickness 10 mm is given a coating which cracks when the strain reaches to 0.0002. The internal pressure (in MPa) at which cracking start in coating is (Take E = 210 GPa, Poisson ratio = 0.25)
Question 9
The method of reducing the hoop stress in a cylinder is ___________.
Question 10
The minimum ratio of diameter to thickness above which spherical shell is called thin spherical cell is
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