API 510 Repair and Alteration Standards 4

Question 1

Under API 510, who is responsible for determining whether an alteration requires engineering review and design calculations?

Accepted Answer

The authorized pressure vessel inspector in consultation with the owner/user

Answer

The authorized pressure vessel inspector, working with the owner/user, determines whether a change qualifies as an alteration requiring engineering review.

Question 2

A vessel operating at a MAWP of 250 psi requires a pneumatic leak test after a repair. The typical pneumatic test pressure is:

Accepted Answer

1.1 times the MAWP (275 psi)

Answer

API 510 references ASME Section VIII, which specifies a pneumatic test pressure of 1.1 times the MAWP for pneumatic tests.

Question 3

When a shell plate section is replaced on a vessel constructed to ASME Section VIII Div. 1, the replacement material must have:

Accepted Answer

An ASME material specification (SA or SB designation) with traceable material certification

Answer

Replacement materials must conform to an ASME-listed specification with material test reports (MTRs) for full traceability.

Question 4

The primary purpose of magnetic particle testing (MT) after weld repair on a carbon steel vessel is to detect:

Accepted Answer

Surface and near-surface cracks, laps, and seams open to or near the surface

Answer

MT detects surface-breaking and near-surface discontinuities in ferromagnetic materials by revealing flux leakage at defect locations.

Question 5

When repairing a vessel with a stainless steel overlay cladding, the repair weld must be made with filler metal that:

Accepted Answer

Matches or is compatible with the cladding alloy composition

Answer

Cladding repair filler metal must be compatible with the alloy being repaired to maintain corrosion resistance and prevent galvanic incompatibility.

(API 510) Certified Pressure Vessel Inspector Practice Test

(API 510) Certified Pressure Vessel Inspector Practice Test

API 510 Repair and Alteration Standards 4