API 510 Pressure Vessel Design & Inspection Codes 2

Question 1

Under ASME Section VIII Division 1, what is the maximum allowable working pressure (MAWP) based on?

Accepted Answer

The weakest element of the completed vessel

Answer

MAWP is determined by the weakest element of the completed vessel, considering all components including shells, heads, and nozzles.

Question 2

According to API 510, a corrosion allowance is used primarily to:

Accepted Answer

Provide metal that can be consumed by corrosion between inspections

Answer

Corrosion allowance is extra metal thickness provided to allow for corrosion that will occur during service between inspection intervals.

Question 3

When calculating the required shell thickness for a cylindrical vessel under internal pressure, which formula from ASME VIII Div. 1 is applied?

Accepted Answer

t = PR / (SE - 0.4P)

Answer

The formula t = PR / (SE - 0.4P) is the ASME VIII Div. 1 formula for longitudinal seam efficiency in cylindrical shells under internal pressure.

Question 4

What does the joint efficiency 'E' represent in ASME Section VIII pressure vessel design calculations?

Accepted Answer

A factor reflecting the quality and type of radiographic examination performed on the weld

Answer

Joint efficiency E is a factor between 0 and 1 that reflects the radiographic examination category and weld joint type, accounting for potential weld discontinuities.

Question 5

A hemispherical head on a pressure vessel, compared to an ellipsoidal head, requires:

Accepted Answer

Less thickness because it has the most favorable shape for resisting pressure

Answer

A hemispherical head has the most efficient shape for internal pressure and requires approximately half the thickness of a comparable cylindrical shell.

(API 510) API 510 Inspector Certification Practice Test

(API 510) API 510 Inspector Certification Practice Test

API 510 Pressure Vessel Design & Inspection Codes 2