chapter 6 welding Techniques Test 2

___is the most effective way to remove rust and scale from steel parts.

Sandblasting

When oxyacetylene welding aluminum over 0.188 inch thick the edges should be ___and __ to ensure proper penetration.

Beveled and notched

An ionized jet of air with a high voltage arc going through it is called _.

Plasma cutting

Circle one (TRUE / FALSE ): Magnesium alloy parts used as structural members on aircraft can be repaired by gas welding.

False

A ____is the slit form in oxyacetylene cutting as the jet of oxygen burns the hot metal away.

Kerf

When rewelding a joint, all the ____must be removed.

Old weld material

In cutting, as in welding, it is the _ of the oxygen and acetylene and the __ that determines the thickness of the material that can be cut.

pressure; size of tip

Originally, _ meant joining by brass.

Brazing

_ is essentially a paddle flattened and shaped from a 1/4 inch stainless steel welding rod and is used to break the oxide film while welding aluminum.

Puddling rod

To ignite a welding torch, use a . Never use a _.

Flint lighter; match

Stainless steel can be oxyacetylene welded satisfactorily if ONLY used for?

Non-structural components

Which of these is not a characteristic of a complete, well-executed weld?

Oxide build-up on the base metal close to the weld

The best color lenses to use for oxyacetylene welding aluminum are:

Rose and Cobalt blue

If the oxyacetylene cutting torch moves too slowly:

The flame can melt the edge of the cut

Brazing Includes which of the following techniques?

All of these

The main use of silver soldering in aircraft maintenance is:

Fabrication of high-pressure oxygen lines

What are two metals that can be cut with a plasma cutter but not with an oxyacetylene torch?

Aluminum and stainless steel

is used for chemically removing the aluminum oxide formed
when oxyacetylene welding aluminum?

Aluminum flux

Essay:
What are the characteristics of a finished, well-executed weld?

See M/C Question 12:
A. The seam is smooth
B. The joint is built up
C. The weld tapers smoothly into the metal

Essay:
What are some things you should do to prepare metal for welding?

The edges must be prepared and cleaned. Arrangements must be made for holding the parts in proper alignment.
OR
Clean it, strip of any coating/paint, sandblast, and arrange for welding.