Question

1. which of the following is a common material used for smaw electrodes?

a) copper
b) aluminum
c) carbon steel
d) stainless steel

1. in smaw welding, the welding electrode is connected to which terminal of the welding machine?

a) positive
b) negative
c) ground
d) ac

1. what type of current is typically used for welding ferrous materials with smaw?

a) direct current electrode negative (dcen)
b) direct current electrode positive (dcep)
c) alternating current (ac)
d) none of the above

1. what is the purpose of the welding helmet in smaw welding?

a) to provide shade from the sun
b) to protect the welders eyes and face from sparks and uv light
c) to filter out harmful gases
d) to enhance visibility

1. when starting an arc in smaw welding, the electrode should be struck against the workpiece at what angle?

a) 0 degrees (perpendicular)
b) 45 degrees
c) 90 degrees (parallel)
d) 180 degrees (opposite)

1. which of the following is not a common safety precaution in smaw welding?

a) use proper ventilation in enclosed spaces.
b) wear appropriate personal protective equipment (ppe).
c) keep flammable materials near the welding area.
d) inspect equipment before use.

Explanation:

1. Carbon steel is a common material for SMAW electrodes due to its availability and suitability for welding.
2. In SMAW welding, the electrode can be connected to either terminal depending on the process (DCEN or DCEP), but typically, it can be connected to positive (DCEP for some applications).
3. Direct current electrode negative (DCEN) is often used for welding ferrous materials as it provides good penetration.
4. The welding helmet protects the welder's eyes and face from sparks and UV light.
5. When starting an arc, the electrode is struck at 90 degrees (parallel) to the workpiece.
6. Keeping flammable materials near the welding area is a hazard, not a safety precaution.

Answer:

1. c) Carbon steel
2. a) Positive
3. a) Direct current electrode negative (DCEN)
4. b) To protect the welder's eyes and face from sparks and UV light
5. c) 90 degrees (parallel)
6. c) Keep flammable materials near the welding area.