27 Pressure Vessels & Piping Design questions from the Mechanical Design bank, written for Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd.
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A.t = PD/2(SEW + PY) plus corrosion allowance and 12.5% mill under-tolerance, then rounded up to a standard schedule
B.t = PR/(SE − 0.6P) for internal pressure under ASME VIII-1, with circumferential stress governing
C.two supports for a horizontal vessel placed near 0.2 of the length from each end, with local shell stresses checked by Zick analysis
D.area-replacement method of UG-37 requiring metal removed by the opening to be replaced within limits by shell excess, nozzle wall and pad
Answer + AI explanation with Pro
2. Which term means: "t = PR/(SE − 0.6P) for internal pressure under ASME VIII-1, with circumferential stress governing"?
Junior
A.Cylindrical shell thickness
B.Saddle supports
C.Nozzle reinforcement
D.B31.3 pipe wall thickness
Answer + AI explanation with Pro
3. Which statement is correct?
Junior
A.Cylindrical shell thickness — area-replacement method of UG-37 requiring metal removed by the opening to be replaced within limits by shell excess, nozzle wall and pad
B.Cylindrical shell thickness — maximum allowable working pressure at the top of the vessel in the operating position at design temperature, set by its weakest component
C.Cylindrical shell thickness — pressure test at 1.3 times MAWP corrected by the stress ratio under ASME VIII-1 UG-99, and 1.5 times design pressure under B31.3
D.Cylindrical shell thickness — t = PR/(SE − 0.6P) for internal pressure under ASME VIII-1, with circumferential stress governing
Answer + AI explanation with Pro
4. What is Hydrostatic test?
Junior
A.pressure test at 1.3 times MAWP corrected by the stress ratio under ASME VIII-1 UG-99, and 1.5 times design pressure under B31.3
B.t = PR/(SE − 0.6P) for internal pressure under ASME VIII-1, with circumferential stress governing
C.two supports for a horizontal vessel placed near 0.2 of the length from each end, with local shell stresses checked by Zick analysis
D.t = PD/2(SEW + PY) plus corrosion allowance and 12.5% mill under-tolerance, then rounded up to a standard schedule
Answer + AI explanation with Pro
5. Which term means: "pressure test at 1.3 times MAWP corrected by the stress ratio under ASME VIII-1 UG-99, and 1.5 times design pressure under B31.3"?
Junior
A.Hydrostatic test
B.Relief valve set pressure
C.Expansion loop
D.Saddle supports
Answer + AI explanation with Pro
6. Which statement is correct?
Junior
A.Hydrostatic test — t = PR/(SE − 0.6P) for internal pressure under ASME VIII-1, with circumferential stress governing
B.Hydrostatic test — pressure test at 1.3 times MAWP corrected by the stress ratio under ASME VIII-1 UG-99, and 1.5 times design pressure under B31.3
C.Hydrostatic test — area-replacement method of UG-37 requiring metal removed by the opening to be replaced within limits by shell excess, nozzle wall and pad
D.Hydrostatic test — U-shaped run of pipe that absorbs thermal growth of about 1.2 mm per metre per 100 °C for carbon steel, analysed for stress and nozzle loads
Answer + AI explanation with Pro
7. What is Nozzle reinforcement?
Mid
A.area-replacement method of UG-37 requiring metal removed by the opening to be replaced within limits by shell excess, nozzle wall and pad
B.pressure test at 1.3 times MAWP corrected by the stress ratio under ASME VIII-1 UG-99, and 1.5 times design pressure under B31.3
C.two supports for a horizontal vessel placed near 0.2 of the length from each end, with local shell stresses checked by Zick analysis
D.U-shaped run of pipe that absorbs thermal growth of about 1.2 mm per metre per 100 °C for carbon steel, analysed for stress and nozzle loads
Answer + AI explanation with Pro
8. Which term means: "area-replacement method of UG-37 requiring metal removed by the opening to be replaced within limits by shell excess, nozzle wall and pad"?
Mid
A.Nozzle reinforcement
B.Expansion loop
C.Saddle supports
D.MAWP
Answer + AI explanation with Pro
9. Which statement is correct?
Mid
A.Nozzle reinforcement — area-replacement method of UG-37 requiring metal removed by the opening to be replaced within limits by shell excess, nozzle wall and pad
B.Nozzle reinforcement — pressure test at 1.3 times MAWP corrected by the stress ratio under ASME VIII-1 UG-99, and 1.5 times design pressure under B31.3
C.Nozzle reinforcement — t = PD/2(SEW + PY) plus corrosion allowance and 12.5% mill under-tolerance, then rounded up to a standard schedule
D.Nozzle reinforcement — safety valve set at or below MAWP with 10% accumulation allowed, or 21% for the fire case, under ASME VIII UG-125
Answer + AI explanation with Pro
10. What is Torispherical head?
Mid
A.two supports for a horizontal vessel placed near 0.2 of the length from each end, with local shell stresses checked by Zick analysis
B.dished head with crown radius equal to the vessel diameter and 6% knuckle radius, cheaper than a 2:1 ellipsoidal head but thicker at the same pressure
C.t = PR/(SE − 0.6P) for internal pressure under ASME VIII-1, with circumferential stress governing
D.maximum allowable working pressure at the top of the vessel in the operating position at design temperature, set by its weakest component
Answer + AI explanation with Pro
11. Which term means: "dished head with crown radius equal to the vessel diameter and 6% knuckle radius, cheaper than a 2:1 ellipsoidal head but thicker at the same pressure"?
Mid
A.Saddle supports
B.MAWP
C.Expansion loop
D.Torispherical head
Answer + AI explanation with Pro
12. Which statement is correct?
Mid
A.Torispherical head — pressure test at 1.3 times MAWP corrected by the stress ratio under ASME VIII-1 UG-99, and 1.5 times design pressure under B31.3
B.Torispherical head — dished head with crown radius equal to the vessel diameter and 6% knuckle radius, cheaper than a 2:1 ellipsoidal head but thicker at the same pressure
C.Torispherical head — t = PD/2(SEW + PY) plus corrosion allowance and 12.5% mill under-tolerance, then rounded up to a standard schedule
D.Torispherical head — two supports for a horizontal vessel placed near 0.2 of the length from each end, with local shell stresses checked by Zick analysis
Answer + AI explanation with Pro
13. What is MAWP?
Junior
A.dished head with crown radius equal to the vessel diameter and 6% knuckle radius, cheaper than a 2:1 ellipsoidal head but thicker at the same pressure
B.maximum allowable working pressure at the top of the vessel in the operating position at design temperature, set by its weakest component
C.safety valve set at or below MAWP with 10% accumulation allowed, or 21% for the fire case, under ASME VIII UG-125
D.U-shaped run of pipe that absorbs thermal growth of about 1.2 mm per metre per 100 °C for carbon steel, analysed for stress and nozzle loads
Answer + AI explanation with Pro
14. Which term means: "maximum allowable working pressure at the top of the vessel in the operating position at design temperature, set by its weakest component"?
Junior
A.Saddle supports
B.Hydrostatic test
C.Cylindrical shell thickness
D.MAWP
Answer + AI explanation with Pro
15. Which statement is correct?
Junior
A.MAWP — area-replacement method of UG-37 requiring metal removed by the opening to be replaced within limits by shell excess, nozzle wall and pad
B.MAWP — t = PR/(SE − 0.6P) for internal pressure under ASME VIII-1, with circumferential stress governing
C.MAWP — maximum allowable working pressure at the top of the vessel in the operating position at design temperature, set by its weakest component
D.MAWP — safety valve set at or below MAWP with 10% accumulation allowed, or 21% for the fire case, under ASME VIII UG-125
Answer + AI explanation with Pro
16. What is Saddle supports?
Mid
A.two supports for a horizontal vessel placed near 0.2 of the length from each end, with local shell stresses checked by Zick analysis
B.dished head with crown radius equal to the vessel diameter and 6% knuckle radius, cheaper than a 2:1 ellipsoidal head but thicker at the same pressure
C.U-shaped run of pipe that absorbs thermal growth of about 1.2 mm per metre per 100 °C for carbon steel, analysed for stress and nozzle loads
D.t = PD/2(SEW + PY) plus corrosion allowance and 12.5% mill under-tolerance, then rounded up to a standard schedule
Answer + AI explanation with Pro
17. Which term means: "two supports for a horizontal vessel placed near 0.2 of the length from each end, with local shell stresses checked by Zick analysis"?
Mid
A.Saddle supports
B.MAWP
C.Hydrostatic test
D.B31.3 pipe wall thickness
Answer + AI explanation with Pro
18. Which statement is correct?
Mid
A.Saddle supports — pressure test at 1.3 times MAWP corrected by the stress ratio under ASME VIII-1 UG-99, and 1.5 times design pressure under B31.3
B.Saddle supports — maximum allowable working pressure at the top of the vessel in the operating position at design temperature, set by its weakest component
C.Saddle supports — t = PD/2(SEW + PY) plus corrosion allowance and 12.5% mill under-tolerance, then rounded up to a standard schedule
D.Saddle supports — two supports for a horizontal vessel placed near 0.2 of the length from each end, with local shell stresses checked by Zick analysis
Answer + AI explanation with Pro
19. What is Expansion loop?
Mid
A.area-replacement method of UG-37 requiring metal removed by the opening to be replaced within limits by shell excess, nozzle wall and pad
B.U-shaped run of pipe that absorbs thermal growth of about 1.2 mm per metre per 100 °C for carbon steel, analysed for stress and nozzle loads
C.two supports for a horizontal vessel placed near 0.2 of the length from each end, with local shell stresses checked by Zick analysis
D.dished head with crown radius equal to the vessel diameter and 6% knuckle radius, cheaper than a 2:1 ellipsoidal head but thicker at the same pressure
Answer + AI explanation with Pro
20. Which term means: "U-shaped run of pipe that absorbs thermal growth of about 1.2 mm per metre per 100 °C for carbon steel, analysed for stress and nozzle loads"?
Mid
A.Saddle supports
B.Relief valve set pressure
C.Cylindrical shell thickness
D.Expansion loop
Answer + AI explanation with Pro
21. Which statement is correct?
Mid
A.Expansion loop — dished head with crown radius equal to the vessel diameter and 6% knuckle radius, cheaper than a 2:1 ellipsoidal head but thicker at the same pressure
B.Expansion loop — t = PR/(SE − 0.6P) for internal pressure under ASME VIII-1, with circumferential stress governing
C.Expansion loop — area-replacement method of UG-37 requiring metal removed by the opening to be replaced within limits by shell excess, nozzle wall and pad
D.Expansion loop — U-shaped run of pipe that absorbs thermal growth of about 1.2 mm per metre per 100 °C for carbon steel, analysed for stress and nozzle loads
Answer + AI explanation with Pro
22. What is B31.3 pipe wall thickness?
Senior
A.t = PD/2(SEW + PY) plus corrosion allowance and 12.5% mill under-tolerance, then rounded up to a standard schedule
B.dished head with crown radius equal to the vessel diameter and 6% knuckle radius, cheaper than a 2:1 ellipsoidal head but thicker at the same pressure
C.U-shaped run of pipe that absorbs thermal growth of about 1.2 mm per metre per 100 °C for carbon steel, analysed for stress and nozzle loads
D.area-replacement method of UG-37 requiring metal removed by the opening to be replaced within limits by shell excess, nozzle wall and pad
Answer + AI explanation with Pro
23. Which term means: "t = PD/2(SEW + PY) plus corrosion allowance and 12.5% mill under-tolerance, then rounded up to a standard schedule"?
Senior
A.Torispherical head
B.B31.3 pipe wall thickness
C.Expansion loop
D.Cylindrical shell thickness
Answer + AI explanation with Pro
24. Which statement is correct?
Senior
A.B31.3 pipe wall thickness — t = PD/2(SEW + PY) plus corrosion allowance and 12.5% mill under-tolerance, then rounded up to a standard schedule
B.B31.3 pipe wall thickness — U-shaped run of pipe that absorbs thermal growth of about 1.2 mm per metre per 100 °C for carbon steel, analysed for stress and nozzle loads
C.B31.3 pipe wall thickness — dished head with crown radius equal to the vessel diameter and 6% knuckle radius, cheaper than a 2:1 ellipsoidal head but thicker at the same pressure
D.B31.3 pipe wall thickness — two supports for a horizontal vessel placed near 0.2 of the length from each end, with local shell stresses checked by Zick analysis
Answer + AI explanation with Pro
25. What is Relief valve set pressure?
Senior
A.safety valve set at or below MAWP with 10% accumulation allowed, or 21% for the fire case, under ASME VIII UG-125
B.area-replacement method of UG-37 requiring metal removed by the opening to be replaced within limits by shell excess, nozzle wall and pad
C.two supports for a horizontal vessel placed near 0.2 of the length from each end, with local shell stresses checked by Zick analysis
D.t = PR/(SE − 0.6P) for internal pressure under ASME VIII-1, with circumferential stress governing
Answer + AI explanation with Pro
26. Which term means: "safety valve set at or below MAWP with 10% accumulation allowed, or 21% for the fire case, under ASME VIII UG-125"?
Senior
A.Torispherical head
B.MAWP
C.Expansion loop
D.Relief valve set pressure
Answer + AI explanation with Pro
27. Which statement is correct?
Senior
A.Relief valve set pressure — maximum allowable working pressure at the top of the vessel in the operating position at design temperature, set by its weakest component
B.Relief valve set pressure — safety valve set at or below MAWP with 10% accumulation allowed, or 21% for the fire case, under ASME VIII UG-125
C.Relief valve set pressure — U-shaped run of pipe that absorbs thermal growth of about 1.2 mm per metre per 100 °C for carbon steel, analysed for stress and nozzle loads
D.Relief valve set pressure — pressure test at 1.3 times MAWP corrected by the stress ratio under ASME VIII-1 UG-99, and 1.5 times design pressure under B31.3
Answer + AI explanation with Pro
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