Question

which of the following ndt methods is typically used to test api pipelines?
radiographic (rt)
ultrasonic (ut)
eddy current (et)
penetrant (pt)

Explanation:

In non - destructive testing (NDT) for API pipelines, Ultrasonic Testing (UT) is commonly used. UT can effectively detect internal flaws in pipelines, has good penetration ability, and is suitable for the inspection of pipeline materials. Radiographic Testing (RT) is also used but is more complex in terms of safety and setup. Eddy Current Testing (ET) is more suitable for surface and near - surface flaws in conductive materials and is not the primary method for API pipeline testing. Penetrant Testing (PT) is mainly for surface - opening flaws and not ideal for the internal inspection of pipelines.

Answer:

B. Ultrasonic (UT)