API 510 Repair and Alteration 5

Question 1

Under API 510, an authorized inspector must be present to witness which activity during a vessel repair?

Accepted Answer

Final closure welds on the pressure boundary

Answer

The authorized inspector must witness critical repair steps including final closure welds to verify compliance with the approved repair procedure.

Question 2

A vessel that requires repair due to fire damage must first be evaluated for:

Accepted Answer

Metallurgical changes caused by the elevated temperatures before repair welding begins

Answer

Fire damage can cause metallurgical degradation, sensitization, or loss of heat treatment in the vessel material, which must be evaluated before any repair welding.

Question 3

Which of the following best describes an acceptable alternative to a hydrostatic test after a pressure vessel repair?

Accepted Answer

A pneumatic test at a reduced pressure with appropriate safety precautions

Answer

A pneumatic test can substitute for a hydrostatic test when it is impractical to fill the vessel with water, provided appropriate safety precautions are taken per the applicable code.

Question 4

When a repair involves replacing a section of vessel shell with new material, the replacement material must be:

Accepted Answer

Of equal or superior specification to the original material per the applicable code

Answer

Replacement materials must meet or exceed the specification of the original material to ensure equivalent pressure-containing capability.

Question 5

Under API 510, which of the following conditions would NOT typically classify as an alteration?

Accepted Answer

Replacing a corroded nozzle with an identical nozzle of the same size and material

Answer

Replacing a nozzle with an identical replacement (same size, material, and rating) is classified as a repair, not an alteration, since no design change is made.

(API 510) API 510 Inspector Certification Practice Test

(API 510) API 510 Inspector Certification Practice Test

API 510 Repair and Alteration 5