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mechanical engineering review board exam pressure vessel 2022.....
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MECHANICAL ENGINEERING REVIEW BOARD EXAMPRESSURE VESSEL
1. Find the thickness of a metal needed in the semi-spherical end of cylindrical vessel 0.70 meter in
diameter subjected to an internal pressure of 2.7 N/mm2. The material is mild carbon steel and tensile
stress is 69 N/mm.
A. 5.2 mm
B. 6.02 mm
C. 7.53 mm
D. 6.84 mm
2. A cylindrical tank with 10 inches inside diameter contains oxygen gas at 2500 psi. Calculate
the required wall thickness in millimeter under stress of 28,000 psi.
A. 10.54
B. 11.34
C. 10.24
D. 12.44
3. Determine the bursting pressure of steel with diameter of 10 inches and make of ¼ in thick
plate. The joint efficiency is at 70% and the tensile strength is 60 ksi.
A. 4,020 psi
B. 4,002 psi
C. 2,400 psi
D. 4,200 psi
4. Determine the safe wall thickness of a 30 inches steel with internal pressure of 7.82 Mpa. The
yield stress of material is at 275.48 Mpa. The factor of safety to use is 2.0.
A. ¾ in
B. 23.4 cm
C. 21.6 mm
D. 5/8 in
5. Determine the bursting steam pressure of a steel shell with a diameter of 10 inches and made of ¼
inch thick steel plate. The joint efficiency is at 70% and the tensile strength is 60 ksi.
A. 10.5 psi
B. 42.8 psi
C. 8,500 psi
6. Compute the safe wall thickness of a 76.2 cm diameter steel tank. The tank is subjected to 7.33 Mpa
pressure and the steel material has yield stress of 215.4 Mpa. The factor of safety to use is 3.
A. 1 ½ in
B. 3.89 cm
C. 4.09 cm
D. 3.69 cm
7. A steel cylinder air receiver with 5 feet diameter and pressure load of 180 psi, design stress of 9500
psi maximum. The pressure vessel is to be provided with 1 ½” diameter drain valve installed at the
bottom of the vessel and safety pressure relief valve installed either at the top most or at the side with
prop-out rating of 200 psi. Assume a 100% weld joint efficiency. The lap welding tensile strength is
65,000 psi. Determine the bursting pressure of this air receiver.
A. 1154 psi
B. 1354 psi
C. 1454 psi
D. 1254 psi
8. Determine the thickness of a steel air receiver with 30 inches diameter and pressure load of 120
psi, design stress of 8000 psi.
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