Welding 29109-15 SMAW-Beads and Fillet Welds

Oil, grease, and other petroleum products should be kept way from _____.

• argon

• nitrogen

• oxygen

• methane

One of the materials that produces toxic fumes when welded is ______.

• aluminum

• chromium

• carbon steel

• iron oxide

Before practicing stringer and weave beads using welding coupons made of 1/4" to 3/4" thick mild steel, use a wire brush or grinder to ________.

• shape the edges

• create numerous grooves

• roughen the surface

• remove heavy mill scale or corrosion

When practicing welding, reuse weld coupons until

• all surfaces have been welded on

• they cannot be cut apart

• they are needed for a job

• they are burned

When striking an arc in SMAW, the general rule is that the arc length should be

• twice the diameter of the electrode metal core

• less than the diameter of the electrode metal core

• half the length of the electrode metal core

• the same as the diameter of the electrode metal core

Arc length is measured from

• the end of the electrode holder to the base metal

• the end of the electrode core to the base metal

• one end of the electrode to the other

• the striking area to the ground clamp

The best method of striking an arc when using a transformer-type DC welding machine is the

• scratching method

• grounding method

• weaving method

• tapping method

Concentrated magnetic fields in the base metal can cause the arc to

• stop

• increase in length

• decrease in length

• deflect or blow

Magnetic fields created from the flow of welding current tend to concentrate in the corners of the

• electrode

• base metal

• electrode holder

• grounding clamp

Welding codes require that the crater made by termination of the weld be filled to its full

• cross section

• length

• width

• depth