CWI Fundamentals Tech 2

Question 1

Which welding position is designated as 'overhead' per AWS terminology?

Accepted Answer

4G

Answer

The 4G position designates overhead groove welding per AWS classification.

Question 2

What is the primary purpose of a preheat in welding?

Accepted Answer

Reduce hydrogen cracking risk

Answer

Preheat slows the cooling rate and allows hydrogen to diffuse out, reducing the risk of hydrogen-induced cracking.

Question 3

A welder qualification test using a 1-inch plate in the 3G position qualifies the welder for which plate thicknesses?

Accepted Answer

3/16 in. to 2 in.

Answer

Per AWS D1.1, a 1-inch test plate in 3G qualifies from 3/16 inch up to 2 inches maximum.

Question 4

What type of current is typically used with SMAW electrodes classified as EXX10?

Accepted Answer

DCEP (reverse polarity)

Answer

EXX10 electrodes require DCEP (electrode positive) to operate correctly with their cellulosic flux coating.

Question 5

When measuring arc voltage, where should the measurement be taken?

Accepted Answer

As close to the arc as possible

Answer

Arc voltage must be measured as close to the arc as possible to account for cable resistance losses.

CWI Practice Test