CWI Fundamentals Tech 3

Question 1

Which destructive test is used to evaluate the ductility of a weld by bending the sample around a specified radius?

Accepted Answer

Guided bend test

Answer

The guided bend test evaluates weld ductility and soundness by bending specimens to a prescribed radius on a jig.

Question 2

Interpass temperature refers to the maximum temperature of the weld area measured just before:

Accepted Answer

Each subsequent pass is started

Answer

Interpass temperature is the maximum allowed temperature of the base metal in the weld zone immediately before depositing each subsequent weld pass.

Question 3

In FCAW, what does a 'T-1' designation in the electrode classification indicate?

Accepted Answer

Rutile (titania) slag system, all-position capable

Answer

The T-1 designation indicates a titania-slag flux-cored electrode designed for flat/horizontal, with some being all-position capable.

Question 4

What is the minimum preheat temperature typically required for ASTM A514 steel (quenched and tempered) with thickness over 2.5 inches?

Accepted Answer

150°F (65°C)

Answer

AWS D1.1 requires a minimum preheat of 150°F for A514 steel over 2.5 inches thick to reduce hydrogen cracking risk.

Question 5

A weld that exhibits 'burn-through' is caused by which condition?

Accepted Answer

Excessive heat input or arc on thin base metal

Answer

Burn-through occurs when excessive heat melts completely through the base metal, creating a hole in the weld.

CWI Practice Test