WLDG 1428 Test # 1 Study Questions
What are the two parts of the SMAW electrode?
(1) Core wire (2) Baked chemical coating
What is the purpose of the baked chemical coating?
(1) Helps start and stabilize the arc (2) Protects the weld puddle
What are the methods for striking an arc?
(1) Scratch (2). Tap
What is generally a proper electrode angle?
65-70 degrees
What AWS Specification has requirements for welding electrodes, rods, and fluxes?
A5.x series
Define DCEN
Direct Current Electrode Negative -- with this type of current, 30% of the welding heat is at the electrode tip and 70% is at the work (DC Straight)
Define DCEP
Direct Current Electrode Positive. - with this type of current, 70% of the welding heat is at the electrode tip and 30% is at the workpiece. (DC Reverse)
Define polarity
Direction of welding current flow when welding with a DC type current
What are examples of PPE?
Helmet, proper footwear, gloves
What are welding consumables?
Materials used during welding such as electrodes, filler rods, fluxes, shielding gases
What is NEMA
National Electrical Manufacturers Association
What is SMAW?
Shielded Metal Arc Welding
What is amperage?
The amount of electricity flowing through a wire.
What is typically a good arc length?
The electrode diameter
Current type
There are two types of current: alternating current (AC) and direct current (DC)
Define DC
current that flows in only one direction
What is PPE?
personal protective equipment
Define AC
refers to current that changes direction of flow
Define voltage
the electrical pressure; the amount of push behind current flow
