API API-570

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API Piping Inspector Sample Questions:

1. Why should a leaking threaded joint not be tightened while the system is in service?

A) The craftsman should not be near the threaded connection
B) Rust or corrosion might be holding the pressure
C) The joint might be unscrewed
D) A crack in a thread root might fail

2. Erosion of the piping system usually occurs at:

A) Any low-velocity and low-turbulence areas
B) Elbows
C) Upstream of pump discharges
D) Along straight run pipe

3. What is the definition of normalizing?

A) Heating an alloy to a suitable temperature, holding that temperature long enough to allow constituents to enter into solid solution and then cooling ~ rapidly enough to hold the constituents.
B) Rapid cooling of a heated metal
C) Process where a ferrous metal is heated to a suitable temperature above the transformation range and is subsequently cooled in still air at room temperature.
D) Heating to and holding at a suitable temperature and then cooling at a suitable rate to reduce hardness, improve machinability, facilitate cold working, etc.

4. What is the pressure design thickness of NPS10A516 Gr.65 Type 22 pipe that operateat 1200psig/750°F

A) 0.928"
B) Not enough in formation given
C) 0.432"
D) 0.46"

5. The base metal is P.No.8, the weld metal is A . No.8-9, and the wall thickness is 1", what is the hold time for heat treatment

A) 1 hour
B) ½ hour for each 1" thickness
C) 2 hours
D) None

Solutions: