CWI Fundamentals 5

Question 1

What is the meaning of the flag symbol on a weld symbol's reference line?

Accepted Answer

The weld is to be made in the field (not in the shop)

Answer

A flag (pennant) at the junction of the reference line and arrow indicates a field weld, meaning it is to be performed at the erection site rather than in the fabrication shop.

Question 2

Which condition describes 'overlap' as a weld discontinuity?

Accepted Answer

Weld metal that has not fused with the base metal but has rolled over the weld toe

Answer

Overlap occurs when weld metal flows beyond the weld toe onto the base metal surface without fusing, creating a notch-like condition at the interface.

Question 3

A CWI must verify that a filler metal bears an AWS classification label before use. This requirement primarily ensures:

Accepted Answer

The filler metal meets minimum mechanical and chemical composition requirements

Answer

AWS classification testing confirms that the filler metal's deposited weld metal meets specified tensile strength, yield strength, and chemical composition requirements.

Question 4

What is the typical angle of a 'V-groove' weld joint's included angle as commonly specified?

Accepted Answer

60° to 75°

Answer

A standard V-groove weld typically uses an included angle of 60° (30° bevel per side), though angles from 60° to 75° are common depending on the applicable code.

Question 5

Postweld heat treatment (PWHT) is primarily performed to:

Accepted Answer

Relieve residual stresses in the weldment

Answer

PWHT (stress relief) heats the weldment to a specified temperature below the transformation range to reduce residual welding stresses and temper hard HAZ microstructures.

CWI Practice Test

CWI Practice Test

CWI Fundamentals 5