CWS CWS Weld Inspection & Testing

Question 1

Which nondestructive testing (NDT) method uses high-frequency sound waves to detect internal weld discontinuities?

Accepted Answer

Ultrasonic testing

Answer

Magnetic particle testing

Answer

Liquid penetrant testing

Answer

Visual testing

Question 2

According to AWS D1.1, what is the minimum preheat temperature required for ASTM A36 steel greater than 1.5 inches thick?

Accepted Answer

150°F (66°C)

Answer

32°F (0°C)

Answer

225°F (107°C)

Answer

300°F (149°C)

Question 3

A CWS notices undercut along the toe of a fillet weld. What is the most common cause of this discontinuity?

Accepted Answer

Excessive travel speed

Answer

Too slow travel speed

Answer

Insufficient shielding gas

Answer

Low amperage

Question 4

Which weld discontinuity is characterized by a fold of metal that has been rolled or forged into the surface but is not fused to the base metal?

Accepted Answer

Overlap

Answer

Porosity

Answer

Undercut

Answer

Lap

Question 5

When performing a macro examination of a weld cross-section, which etchant is most commonly used for carbon steel welds?

Accepted Answer

Nital (nitric acid in alcohol)

Answer

Ferric chloride

Answer

Ammonium persulfate

Answer

Hydrochloric acid

Question 6

A radiographic test report shows a 2T indication in a groove weld. What does '2T' refer to?

Accepted Answer

Two times the material thickness

Answer

Two times the throat size

Answer

A defect classified as Type 2

Answer

A tensile strength of 2,000 psi