API 570 PIPING INSPECTOR · PUBLICATION
API 577 in the API 570 Piping Inspector exam
Welding Processes, Inspection, and Metallurgy. Our API 570 Piping Inspector bank draws 738 of its 5,261 questions from this publication — 14% — and they cite 182 different clauses, 8 of them open book. The clause list below is counted from those questions, not copied from a syllabus.
Clauses the questions cite
The 40 most cited of 182, in document order. The number is how many questions in our bank reference that clause.
What they ask about
Free sample questions from API 577
For GTAW, a change in the "A-Number" (deposited weld metal composition) is considered what type of variable?
- A. Nonessential
- B. Essential ✓
- C. Supplementary Essential
- D. Tooling
- E. Auxiliary
QW-404.5 states that a change in the A-Number is an essential variable for the WPS and PQR. API 577, 6.2.2.1
As per API 577, when using radiography to qualify a welder on a test coupon, what is the minimum length of the weld that must be examined?
- A. 3 in. (75 mm)
- B. 6 in. (150 mm) ✓
- C. 10 in. (250 mm)
- D. 12 in. (300 mm)
- E. 36 in. (900 mm)
For welder coupons, a minimum of 6 inches must be radiographed; for welding operators, it is 36 inches. API 577, 7.6
Other publications in this exam
Counts are from AssetronX’s own question bank and describe what we have written, not what the exam contains. AssetronX is an independent examination-preparation provider and is not affiliated with, endorsed by or accredited by any certifying body or standards organisation. The clause numbers refer to the publications’ own paragraphs; the publications themselves are not reproduced here.

