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API Piping Inspector Sample Questions:

1. Of the following examples, which one may cause a leak in a threaded joint?

A) Lack of thread lubricant
B) Under pressuring the part
C) Changing the direction of flow in the piping system
D) Back welding the fitting

2. With respect to Category 'D' service, what is the maximum allowable undercut for a branch connection?

A) Zero (no evident imperfections)
B) £ 1/32"
C) Both B and C
D) £ 1 mm

3. After application of a non destructive evaluation technique, any resulting evidence is commonly referred to as

A) a leak
B) porosity
C) an indication
D) A crack

4. What is the most common method used to manufacture tubing?

A) Riveted
B) Seamlessly drawn
C) Forged
D) Wire drawn

5. A piping system that operates at a design pressure of 100 psi at 950? F was originally built from NPS 20 EFW (100% radiographed), ½" wall, A-516 Grade 70, A-671 material. During the last Inspection, the thickness was determined to be 0.370 inches. The records indicated the corrosion rate to be 0.009 inches per year.
What is MAWP if the next inspection is planned in 5 years?

A) Not enough information given
B) 98.23 psi
C) 126 psi
D) 285.17 psi

Solutions: