AWS Welder Material & Equipment Handling 3

Question 1

What is the recommended storage temperature for low-hydrogen electrodes that have been removed from their original hermetically sealed container?

Accepted Answer

250°F to 300°F (121°C to 149°C) in a rod oven

Answer

Low-hydrogen electrodes must be stored in a rod oven at 250–300°F to prevent moisture absorption that would cause hydrogen-induced cracking.

Question 2

When handling a tungsten electrode for GTAW, why should you avoid touching the tungsten tip with bare fingers?

Accepted Answer

Skin oils contaminate the electrode and degrade arc quality

Answer

Skin oils from bare fingers contaminate the tungsten tip, causing arc instability and weld contamination during GTAW.

Question 3

What is the maximum distance a compressed gas cylinder should be moved without using a proper cylinder cart?

Accepted Answer

Cylinders should not be rolled or dragged at any distance without a cart

Answer

Compressed gas cylinders should always be moved using an approved cylinder cart regardless of distance to prevent tipping and valve damage.

Question 4

A welder is setting up an oxyacetylene outfit. In what order should the regulator gauges read when opening the oxygen cylinder valve?

Accepted Answer

Cylinder pressure rises first, then working pressure is set

Answer

When opening the oxygen cylinder valve, the cylinder (content) pressure gauge rises first to show tank pressure, then the working pressure is adjusted via the regulator.

Question 5

Which of the following indicates that a welding cable has become unsafe for continued use?

Accepted Answer

The cable insulation shows cracks, cuts, or exposed copper

Answer

Cracked, cut, or exposed insulation on a welding cable creates an electrocution hazard and requires immediate replacement.

AWS Practice Test

AWS Practice Test

AWS Welder Material & Equipment Handling 3