API API-570 : Piping Inspector

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API Piping Inspector Sample Questions:

1. Piping subject to CUI includes piping insulated for personnel protection, especially:

A) carbon steel piping systems operating between 25°F-250°F
B) plastic piping
C) glass lined piping
D) carbon steel piping systems

2. 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) 126 psi
B) 285.17 psi
C) 98.23 psi
D) Not enough information given

3. 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) Back welding the fitting
D) Changing the direction of flow in the piping system

4. The weld ripples of reinforcement of butt-welded joints shall be before radiography.

A) ground flush, with grinding direction perpendicular to the weld
B) removed if irregularities mask discontinuities
C) ground flush, with grinding direction parallel to the weld
D) removed

5. The type of joints generally limited to piping in non critical service NPS 2 and smaller is.

A) brazed
B) threaded
C) clamped
D) butt welded

Solutions: