27 Pressure Vessels & Equipment questions from the Process Design bank, written for Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd.
Free to start: the 2-minute CH readiness check — six questions and a result.
A.cylindrical shell formula t = PR/(SE − 0.6P) for internal pressure, with allowable stress S, joint efficiency E and inside radius R, plus corrosion allowance
B.617 covers axial and centrifugal compressors and expander-compressors; 618 covers reciprocating compressors for petroleum, chemical and gas industries
C.standard for welded atmospheric storage tanks covering shell courses by the one-foot method, bottom plates, cone or floating roofs and nozzles
D.design pressure is operating pressure plus a margin (about 10% or 1–2 bar); MAWP is the maximum the weakest component actually permits at design temperature
Answer + AI explanation with Pro
2. Which term means: "cylindrical shell formula t = PR/(SE − 0.6P) for internal pressure, with allowable stress S, joint efficiency E and inside radius R, plus corrosion allowance"?
Junior
A.API 650 tank
B.ASME VIII Div 1 shell thickness
C.NPSH margin
D.API 617 vs API 618
Answer + AI explanation with Pro
3. Which statement is correct?
Junior
A.ASME VIII Div 1 shell thickness — available net positive suction head should exceed required by at least 1 m or 10% at rated flow, or more for water and hot hydrocarbons, to avoid cavitation
B.ASME VIII Div 1 shell thickness — factor of 1.0, 0.85 or 0.70 applied to weld strength depending on full, spot or no radiographic examination
C.ASME VIII Div 1 shell thickness — standard for heavy-duty refinery pumps classifying overhung, between-bearings and vertically suspended types, with 20-year design life and 3-year uninterrupted operation
D.ASME VIII Div 1 shell thickness — cylindrical shell formula t = PR/(SE − 0.6P) for internal pressure, with allowable stress S, joint efficiency E and inside radius R, plus corrosion allowance
Answer + AI explanation with Pro
4. What is Design pressure vs MAWP?
Junior
A.factor of 1.0, 0.85 or 0.70 applied to weld strength depending on full, spot or no radiographic examination
B.design pressure is operating pressure plus a margin (about 10% or 1–2 bar); MAWP is the maximum the weakest component actually permits at design temperature
C.available net positive suction head should exceed required by at least 1 m or 10% at rated flow, or more for water and hot hydrocarbons, to avoid cavitation
D.area-replacement rule in ASME VIII UG-37 where metal removed by an opening is compensated by excess shell thickness, nozzle wall or a reinforcing pad
Answer + AI explanation with Pro
5. Which term means: "design pressure is operating pressure plus a margin (about 10% or 1–2 bar); MAWP is the maximum the weakest component actually permits at design temperature"?
Junior
A.ASME VIII Div 1 shell thickness
B.Hydrostatic test pressure
C.API 610 centrifugal pump
D.Design pressure vs MAWP
Answer + AI explanation with Pro
6. Which statement is correct?
Junior
A.Design pressure vs MAWP — standard for heavy-duty refinery pumps classifying overhung, between-bearings and vertically suspended types, with 20-year design life and 3-year uninterrupted operation
B.Design pressure vs MAWP — standard for welded atmospheric storage tanks covering shell courses by the one-foot method, bottom plates, cone or floating roofs and nozzles
C.Design pressure vs MAWP — factor of 1.0, 0.85 or 0.70 applied to weld strength depending on full, spot or no radiographic examination
D.Design pressure vs MAWP — design pressure is operating pressure plus a margin (about 10% or 1–2 bar); MAWP is the maximum the weakest component actually permits at design temperature
Answer + AI explanation with Pro
7. What is Joint efficiency?
Junior
A.cylindrical shell formula t = PR/(SE − 0.6P) for internal pressure, with allowable stress S, joint efficiency E and inside radius R, plus corrosion allowance
B.area-replacement rule in ASME VIII UG-37 where metal removed by an opening is compensated by excess shell thickness, nozzle wall or a reinforcing pad
C.design pressure is operating pressure plus a margin (about 10% or 1–2 bar); MAWP is the maximum the weakest component actually permits at design temperature
D.factor of 1.0, 0.85 or 0.70 applied to weld strength depending on full, spot or no radiographic examination
Answer + AI explanation with Pro
8. Which term means: "factor of 1.0, 0.85 or 0.70 applied to weld strength depending on full, spot or no radiographic examination"?
Junior
A.Joint efficiency
B.API 617 vs API 618
C.Nozzle reinforcement
D.Hydrostatic test pressure
Answer + AI explanation with Pro
9. Which statement is correct?
Junior
A.Joint efficiency — standard for welded atmospheric storage tanks covering shell courses by the one-foot method, bottom plates, cone or floating roofs and nozzles
B.Joint efficiency — available net positive suction head should exceed required by at least 1 m or 10% at rated flow, or more for water and hot hydrocarbons, to avoid cavitation
C.Joint efficiency — standard for heavy-duty refinery pumps classifying overhung, between-bearings and vertically suspended types, with 20-year design life and 3-year uninterrupted operation
D.Joint efficiency — factor of 1.0, 0.85 or 0.70 applied to weld strength depending on full, spot or no radiographic examination
Answer + AI explanation with Pro
10. What is Hydrostatic test pressure?
Mid
A.design pressure is operating pressure plus a margin (about 10% or 1–2 bar); MAWP is the maximum the weakest component actually permits at design temperature
B.standard for welded atmospheric storage tanks covering shell courses by the one-foot method, bottom plates, cone or floating roofs and nozzles
C.available net positive suction head should exceed required by at least 1 m or 10% at rated flow, or more for water and hot hydrocarbons, to avoid cavitation
D.ASME VIII Div 1 test at 1.3 times MAWP, corrected by the ratio of allowable stress at test temperature to that at design temperature
Answer + AI explanation with Pro
11. Which term means: "ASME VIII Div 1 test at 1.3 times MAWP, corrected by the ratio of allowable stress at test temperature to that at design temperature"?
Mid
A.API 617 vs API 618
B.NPSH margin
C.API 650 tank
D.Hydrostatic test pressure
Answer + AI explanation with Pro
12. Which statement is correct?
Mid
A.Hydrostatic test pressure — available net positive suction head should exceed required by at least 1 m or 10% at rated flow, or more for water and hot hydrocarbons, to avoid cavitation
B.Hydrostatic test pressure — standard for welded atmospheric storage tanks covering shell courses by the one-foot method, bottom plates, cone or floating roofs and nozzles
C.Hydrostatic test pressure — factor of 1.0, 0.85 or 0.70 applied to weld strength depending on full, spot or no radiographic examination
D.Hydrostatic test pressure — ASME VIII Div 1 test at 1.3 times MAWP, corrected by the ratio of allowable stress at test temperature to that at design temperature
Answer + AI explanation with Pro
13. What is API 650 tank?
Mid
A.design pressure is operating pressure plus a margin (about 10% or 1–2 bar); MAWP is the maximum the weakest component actually permits at design temperature
B.standard for welded atmospheric storage tanks covering shell courses by the one-foot method, bottom plates, cone or floating roofs and nozzles
C.area-replacement rule in ASME VIII UG-37 where metal removed by an opening is compensated by excess shell thickness, nozzle wall or a reinforcing pad
D.standard for heavy-duty refinery pumps classifying overhung, between-bearings and vertically suspended types, with 20-year design life and 3-year uninterrupted operation
Answer + AI explanation with Pro
14. Which term means: "standard for welded atmospheric storage tanks covering shell courses by the one-foot method, bottom plates, cone or floating roofs and nozzles"?
Mid
A.API 650 tank
B.ASME VIII Div 1 shell thickness
C.Joint efficiency
D.Nozzle reinforcement
Answer + AI explanation with Pro
15. Which statement is correct?
Mid
A.API 650 tank — standard for heavy-duty refinery pumps classifying overhung, between-bearings and vertically suspended types, with 20-year design life and 3-year uninterrupted operation
B.API 650 tank — cylindrical shell formula t = PR/(SE − 0.6P) for internal pressure, with allowable stress S, joint efficiency E and inside radius R, plus corrosion allowance
C.API 650 tank — standard for welded atmospheric storage tanks covering shell courses by the one-foot method, bottom plates, cone or floating roofs and nozzles
D.API 650 tank — 617 covers axial and centrifugal compressors and expander-compressors; 618 covers reciprocating compressors for petroleum, chemical and gas industries
Answer + AI explanation with Pro
16. What is API 610 centrifugal pump?
Mid
A.standard for heavy-duty refinery pumps classifying overhung, between-bearings and vertically suspended types, with 20-year design life and 3-year uninterrupted operation
B.ASME VIII Div 1 test at 1.3 times MAWP, corrected by the ratio of allowable stress at test temperature to that at design temperature
C.available net positive suction head should exceed required by at least 1 m or 10% at rated flow, or more for water and hot hydrocarbons, to avoid cavitation
D.617 covers axial and centrifugal compressors and expander-compressors; 618 covers reciprocating compressors for petroleum, chemical and gas industries
Answer + AI explanation with Pro
17. Which term means: "standard for heavy-duty refinery pumps classifying overhung, between-bearings and vertically suspended types, with 20-year design life and 3-year uninterrupted operation"?
Mid
A.Nozzle reinforcement
B.NPSH margin
C.API 650 tank
D.API 610 centrifugal pump
Answer + AI explanation with Pro
18. Which statement is correct?
Mid
A.API 610 centrifugal pump — design pressure is operating pressure plus a margin (about 10% or 1–2 bar); MAWP is the maximum the weakest component actually permits at design temperature
B.API 610 centrifugal pump — area-replacement rule in ASME VIII UG-37 where metal removed by an opening is compensated by excess shell thickness, nozzle wall or a reinforcing pad
C.API 610 centrifugal pump — standard for heavy-duty refinery pumps classifying overhung, between-bearings and vertically suspended types, with 20-year design life and 3-year uninterrupted operation
D.API 610 centrifugal pump — ASME VIII Div 1 test at 1.3 times MAWP, corrected by the ratio of allowable stress at test temperature to that at design temperature
Answer + AI explanation with Pro
19. What is NPSH margin?
Mid
A.factor of 1.0, 0.85 or 0.70 applied to weld strength depending on full, spot or no radiographic examination
B.standard for welded atmospheric storage tanks covering shell courses by the one-foot method, bottom plates, cone or floating roofs and nozzles
C.standard for heavy-duty refinery pumps classifying overhung, between-bearings and vertically suspended types, with 20-year design life and 3-year uninterrupted operation
D.available net positive suction head should exceed required by at least 1 m or 10% at rated flow, or more for water and hot hydrocarbons, to avoid cavitation
Answer + AI explanation with Pro
20. Which term means: "available net positive suction head should exceed required by at least 1 m or 10% at rated flow, or more for water and hot hydrocarbons, to avoid cavitation"?
Mid
A.Hydrostatic test pressure
B.NPSH margin
C.API 617 vs API 618
D.ASME VIII Div 1 shell thickness
Answer + AI explanation with Pro
21. Which statement is correct?
Mid
A.NPSH margin — standard for heavy-duty refinery pumps classifying overhung, between-bearings and vertically suspended types, with 20-year design life and 3-year uninterrupted operation
B.NPSH margin — available net positive suction head should exceed required by at least 1 m or 10% at rated flow, or more for water and hot hydrocarbons, to avoid cavitation
C.NPSH margin — 617 covers axial and centrifugal compressors and expander-compressors; 618 covers reciprocating compressors for petroleum, chemical and gas industries
D.NPSH margin — standard for welded atmospheric storage tanks covering shell courses by the one-foot method, bottom plates, cone or floating roofs and nozzles
Answer + AI explanation with Pro
22. What is API 617 vs API 618?
Senior
A.cylindrical shell formula t = PR/(SE − 0.6P) for internal pressure, with allowable stress S, joint efficiency E and inside radius R, plus corrosion allowance
B.available net positive suction head should exceed required by at least 1 m or 10% at rated flow, or more for water and hot hydrocarbons, to avoid cavitation
C.617 covers axial and centrifugal compressors and expander-compressors; 618 covers reciprocating compressors for petroleum, chemical and gas industries
D.standard for welded atmospheric storage tanks covering shell courses by the one-foot method, bottom plates, cone or floating roofs and nozzles
Answer + AI explanation with Pro
23. Which term means: "617 covers axial and centrifugal compressors and expander-compressors; 618 covers reciprocating compressors for petroleum, chemical and gas industries"?
Senior
A.API 617 vs API 618
B.Hydrostatic test pressure
C.Joint efficiency
D.NPSH margin
Answer + AI explanation with Pro
24. Which statement is correct?
Senior
A.API 617 vs API 618 — standard for welded atmospheric storage tanks covering shell courses by the one-foot method, bottom plates, cone or floating roofs and nozzles
B.API 617 vs API 618 — factor of 1.0, 0.85 or 0.70 applied to weld strength depending on full, spot or no radiographic examination
C.API 617 vs API 618 — 617 covers axial and centrifugal compressors and expander-compressors; 618 covers reciprocating compressors for petroleum, chemical and gas industries
D.API 617 vs API 618 — design pressure is operating pressure plus a margin (about 10% or 1–2 bar); MAWP is the maximum the weakest component actually permits at design temperature
Answer + AI explanation with Pro
25. What is Nozzle reinforcement?
Senior
A.area-replacement rule in ASME VIII UG-37 where metal removed by an opening is compensated by excess shell thickness, nozzle wall or a reinforcing pad
B.standard for heavy-duty refinery pumps classifying overhung, between-bearings and vertically suspended types, with 20-year design life and 3-year uninterrupted operation
C.ASME VIII Div 1 test at 1.3 times MAWP, corrected by the ratio of allowable stress at test temperature to that at design temperature
D.standard for welded atmospheric storage tanks covering shell courses by the one-foot method, bottom plates, cone or floating roofs and nozzles
Answer + AI explanation with Pro
26. Which term means: "area-replacement rule in ASME VIII UG-37 where metal removed by an opening is compensated by excess shell thickness, nozzle wall or a reinforcing pad"?
Senior
A.NPSH margin
B.API 617 vs API 618
C.Joint efficiency
D.Nozzle reinforcement
Answer + AI explanation with Pro
27. Which statement is correct?
Senior
A.Nozzle reinforcement — area-replacement rule in ASME VIII UG-37 where metal removed by an opening is compensated by excess shell thickness, nozzle wall or a reinforcing pad
B.Nozzle reinforcement — 617 covers axial and centrifugal compressors and expander-compressors; 618 covers reciprocating compressors for petroleum, chemical and gas industries
C.Nozzle reinforcement — cylindrical shell formula t = PR/(SE − 0.6P) for internal pressure, with allowable stress S, joint efficiency E and inside radius R, plus corrosion allowance
D.Nozzle reinforcement — ASME VIII Div 1 test at 1.3 times MAWP, corrected by the ratio of allowable stress at test temperature to that at design temperature
Answer + AI explanation with Pro
Free to start
Start with a free readiness check
Sign up free for the 2-minute CH readiness check and a scored result. Answers, explanations and the AI tutor on every Pressure Vessels & Equipment question come with Pro.