Certified Welder Weld Inspection and Testing Questions and Answers

Question 1

An inspector is required to check a carbon steel pipe weld for fine surface and near-surface cracks.
Which of the following non-destructive testing (NDT) methods is most suitable for this specific application?

Accepted Answer

Magnetic Particle Testing (MT)

Answer

Liquid Penetrant Testing (PT)

Answer

Radiographic Testing (RT)

Answer

Visual Testing (VT)

Question 2

Which of the following weld discontinuities can be reliably detected using Liquid Penetrant Testing (PT)?

Accepted Answer

A crack that is open to the surface

Answer

Incomplete fusion deep within the weld joint

Answer

Slag inclusions located below the surface

Answer

Internal porosity completely enclosed by weld metal

Question 3

During a radiographic inspection (RT) of a butt weld, the resulting film shows a localized area that is significantly darker than the surrounding base metal. What does this darker indication most likely represent?

Accepted Answer

A void, such as porosity or lack of penetration

Answer

A region of greater thickness, such as excessive reinforcement

Answer

A dense metallic inclusion, like a tungsten fragment

Answer

A crack aligned perfectly parallel to the radiation beam

Question 4

A technician is performing an ultrasonic test (UT) on a thick-section weld. What is the fundamental principle this method uses to identify internal flaws?

Accepted Answer

The reflection of high-frequency sound waves from a discontinuity

Answer

The absorption of X-rays by dense materials

Answer

The disruption of a magnetic field by a crack

Answer

The capillary action of a colored dye into a surface-breaking flaw

Question 5

Which of the following is a destructive testing method specifically designed to measure the ultimate strength and ductility of a welded joint by pulling it apart?

Accepted Answer

Tensile test

Answer

Nick-break test

Answer

Bend test

Answer

Hardness test

Question 6

According to common industry standards, such as EN ISO 17637, which of the following is a key requirement for performing an effective direct visual inspection of a weld?

Accepted Answer

The inspector's eye must be within 600 mm of the surface and at an angle of not less than 30 degrees.

Answer

The surface must be coated with a high-contrast paint.

Answer

The inspection must be performed under ultraviolet (black) light.

Answer

The weld must be at a minimum temperature of 100°C (212°F) to ensure any moisture has evaporated.

An inspector is required to check a carbon steel pipe weld for fine surface and near-surface cracks.Which of the following non-destructive testing (NDT) methods is most suitable for this specific application?

An inspector is required to check a carbon steel pipe weld for fine surface and near-surface cracks.
Which of the following non-destructive testing (NDT) methods is most suitable for this specific application?