AFAA COMPREHENSIVE BUNDLE FINAL
REVIEW 2026 ACCURATE ANSWERS
GRADED A+
⩥ What determines the minimum bend radius that can be used when
forming a sheet metal structure fitting? Answer: The alloy, the metal
thickness, and its hardness.
⩥ What is meant by the neutral axis in a sheet of metal? Answer: It's the
material in the bend that neither stretches or shrinks.
⩥ What is a mold line in the development of a flat pattern for a formed
metal part? Answer: An extension of the flat sides beyond the radius.
⩥ What is the bend tangent line? Answer: A line in a flat pattern layout
at which the bend starts.
⩥ What is meant by setback? Answer: The distance the jaws of a brake
must be set back from the mold line to form a bend.
⩥ What is meant by bend allowance? Answer: The actual amount of
metal in a bend.
, ⩥ What is a sight line? Answer: A line drawn on a flat pattern layout
within the bend allowance that is one bend radius from the bend tangent
line.
⩥ What is the main function of the throatless shears in an aircraft sheet
metal shop? Answer: They can be used to cut irregular curves in the
metal.
⩥ What kind of metal forming is done by a slip roll former? Answer:
Simple curves with a large radius.
⩥ What kind of metal forming is done by bumping? Answer: Compound
curves in sheet metal.
⩥ When forming a curved angle, what must be done to the flanges?
Answer: The flanges must be stretched for a convex curve and shrunk
for a concave curve.
⩥ When hand-forming a piece of sheet metal that has a concave curve,
should the forming be started in the center of the curve, or at its edges?
Answer: Start at the edges and work toward the center.
⩥ What type of device is a Cleco fastener? Answer: A patented fastener
that is inserted in the rivet holes and is used to hold two pieces of sheet
metal together until they can be riveted.
REVIEW 2026 ACCURATE ANSWERS
GRADED A+
⩥ What determines the minimum bend radius that can be used when
forming a sheet metal structure fitting? Answer: The alloy, the metal
thickness, and its hardness.
⩥ What is meant by the neutral axis in a sheet of metal? Answer: It's the
material in the bend that neither stretches or shrinks.
⩥ What is a mold line in the development of a flat pattern for a formed
metal part? Answer: An extension of the flat sides beyond the radius.
⩥ What is the bend tangent line? Answer: A line in a flat pattern layout
at which the bend starts.
⩥ What is meant by setback? Answer: The distance the jaws of a brake
must be set back from the mold line to form a bend.
⩥ What is meant by bend allowance? Answer: The actual amount of
metal in a bend.
, ⩥ What is a sight line? Answer: A line drawn on a flat pattern layout
within the bend allowance that is one bend radius from the bend tangent
line.
⩥ What is the main function of the throatless shears in an aircraft sheet
metal shop? Answer: They can be used to cut irregular curves in the
metal.
⩥ What kind of metal forming is done by a slip roll former? Answer:
Simple curves with a large radius.
⩥ What kind of metal forming is done by bumping? Answer: Compound
curves in sheet metal.
⩥ When forming a curved angle, what must be done to the flanges?
Answer: The flanges must be stretched for a convex curve and shrunk
for a concave curve.
⩥ When hand-forming a piece of sheet metal that has a concave curve,
should the forming be started in the center of the curve, or at its edges?
Answer: Start at the edges and work toward the center.
⩥ What type of device is a Cleco fastener? Answer: A patented fastener
that is inserted in the rivet holes and is used to hold two pieces of sheet
metal together until they can be riveted.
