FREE Certified Welder Weld Inspection Methods Questions and Answers

Question 1

Which non-destructive testing (NDT) method is primarily used to detect surface-breaking defects such as cracks, pores, and laps by drawing a colored or fluorescent liquid penetrant into the discontinuity?

Accepted Answer

Liquid Penetrant Testing (PT)

Answer

Magnetic Particle Testing (MT)

Answer

Ultrasonic Testing (UT)

Answer

Radiographic Testing (RT)

Question 2

A welder has completed a critical butt weld on a ferromagnetic steel pipeline. Which NDT method would be most effective for detecting both surface and shallow subsurface cracks, especially those oriented perpendicular to the magnetic field?

Accepted Answer

Magnetic Particle Testing (MT)

Answer

Radiographic Testing (RT)

Answer

Visual Inspection (VI)

Answer

Eddy Current Testing (ET)

Question 3

During a visual inspection of a completed fillet weld, which of the following would be considered an unacceptable defect according to typical welding codes?

Accepted Answer

Undercut exceeding specified limits

Answer

Slightly convex bead profile

Answer

Uniform leg length

Answer

Consistent weld toe angle

Question 4

Which non-destructive testing (NDT) method uses high-frequency sound waves to detect internal discontinuities, measure material thickness, and characterize weld integrity, making it suitable for both surface and subsurface flaws in various materials?

Accepted Answer

Ultrasonic Testing (UT)

Answer

Leak Testing (LT)

Answer

Acoustic Emission Testing (AET)

Answer

Vacuum Box Testing (VBT)

Question 5

A radiographer is examining X-ray film of a butt weld. The presence of dark, elongated, worm-like indications scattered throughout the weld metal is most likely indicative of which type of discontinuity?

Accepted Answer

Slag inclusions

Answer

Porosity

Answer

Lack of fusion

Answer

Tungsten inclusions

Question 6

Before any other inspection method, what is considered the most fundamental and universally applied weld inspection technique, often performed continuously during welding and after completion?

Accepted Answer

Visual Inspection (VI)

Answer

Magnetic Particle Testing (MT)

Answer

Ultrasonic Testing (UT)

Answer

Radiographic Testing (RT)