Chapter 20(old)

Testing for TIG pipe welds are completely different to that of plate.

The inside of a pipe may be protected by painting it with an appropriate flux.

Porosity caused by inadequate gas shielding may be the result of an electrode that is too large.

Filler passes are used to fill the pipe joint to within ____ inch of the top surface of the pipe.

Control of ____ is the most important factor in successful root-pass welding.

__is preferred for applications requiring light weight, corrosion resistance and nontoxic materials for food processing.

Add filler rod to the weld puddle to correct excessive penetration in the root pass of a TIG weld on pipe.

Rust, oil, grease and moisture on a weld joint may result in porosity in the weld.

___ is the process by which argon or helium pass through the pipe to shield the weld pool.

Filler passes may be made only by the stringer bead technique.

When TIG welding pipe, the presence of a __ in the weld pool indicates the lack of penetration inside of the pipe.

Branch joints require the stringer bead technique.

Welding pipe in the horizontal fixed position enables a welder to practice ____ welding positions.

The formation of carbon monoxide or carbon dioxide during steel welding will cause porosity in the weld.

welding pipe in the 2g position requires start the weld below the center line of the pipe and weld toward the top

The first pass must be applied carefully because the root pass made with GTAW is thin, so burn through is possible

To ___ a weld bead, direct the weld puddle off to the side of the joint.

Stainless steel, copper and nickel are metals which are resistant to corrosive to chemicals.

TIG welding pipe in the vertical position requires techniques to compensate for sagging of the weld puddle caused by __

Pipe joints welded in the vertical fixed position should be made with a wide weave bead.

Finished cover passes should be 3/32" wider than the beveled edges on each side of the joint.

When welding the second pass in TIG pipe welding, great care must be taken due to the root pass is likely to be ____.

The TIG welding process is limited to the use of nonferrous piping materials.

For welding carbon steel pipe, the TIG process is used only for the ____ pass.

The first pass is not as critical as the fill and cap.