A.E_MAJOR EXAM.3

In cases of elongated boltholes in a wood spar or cracks in the vicinity of boltholes,

• a old section of spar should be spliced in or the spar replaced entirely.
• a new section of spar should be spliced in or the ribs replaced entirely.
• a new section of spar should be spliced in or the spar replaced entirely.

Glue deterioration in wood aircraft structure is indicated

• when a joint has separated and the glue surface shows only the imprint of the wood with no wood f ibers clinging to the glue.
• when a joint has separated and the glue surface shows pieces of wood and/or wood fibers clinging to the glue.
• when a joint has separated and the glue surface shows only the imprint of the metal with no metal fibers clinging to the glue.

Which statement is true in regard to welding heattreated magnesium?

• The welded section does not have the strength of the original metal.
• The welded section does have the strength of the original metal.
• The welded section does not have the strength of the original wood.

In Gas Tungsten Arc (GTA) welding, a stream of inert gas is used to

• prevent the formation of oxides in the puddle.
• prevent the formation of oxides in the stream.
• prevent the formation of oxides in the air.

Which statement best describes magnesium welding?

• Filler gauge should be the same composition as base metal.
• Filler rod should not be the same composition as base metal.
• Filler rod should be the same composition as base metal.

A well-designed rivet joint will subject the rivets to

• compressive loads.
• shear loads.
• tension loads.

A main difference between Lockbolt/Huckbolt tension and shear fasteners (other than their application) is in the

• number of locking collar grooves.
• shape of the head.
• method of installation.

Alloy 2117 rivets are heat treated

• by the manufacturer and do not require heat treatment before being driven.
• by the manufacturer and require heat treatment before being driven.
• by the manufacturer and do not require heat treatment after being driven.

The general rule for finding the proper rivet diameter is

• four times the thickness of the thickest sheet.
• two times the thickness of the thickest sheet.
• three times the thickness of the thickest sheet.

The shop head of a rivet should be

• one and one-half times the diameter of the rivet shank.
• one and one-half times the length of the rivet shank.
• one and one-half times the diameter of the rivet head.