AEROSPACE MATERIALS LATEST EXAM 2026/2027
QUESTIONS AND SOLUTIONS RATED A+
✔✔Softwood - ✔✔Type of wood primarily used for aircraft structure.
✔✔Solid Wood - ✔✔This form of wood is cut form a tree and dried only. No other
manufacturing takes place.
✔✔.34-.4 - ✔✔One way to evaluate the health of a piece of wood is to measure its
specific gravity range for aircraft structural wood.
✔✔1:15 - ✔✔Maximum permissible grain deviation for aircraft structural wood
✔✔Hardwood - ✔✔Broad-Leaved trees such as birch, elm, hickory, mahogany, and
maple
✔✔8-12% - ✔✔Acceptable moisture content for aircraft softwood
✔✔Laminated wood - ✔✔Form of wood consists of layers solid wood glued together
with the grains running in the same direction
✔✔Sitka Spruce - ✔✔reference softwood to which all other softwoods are compared
with regard to strength, gluing, and workability
✔✔Birch or Mahogany - ✔✔Most common type of plywood
✔✔Rib stitching or pull-type rivets - ✔✔Method to mechanically attach fabric to the wing
rib
✔✔Plywood - ✔✔Form of wood is comprised of thin layers of wood glued together with
the grain of each layer at an angle 45-90 degrees
✔✔Water and the Tightening Dope - ✔✔Used to tighten organic fabric once it is applied
to the aircraft structure
✔✔Silver Dope - ✔✔Aircraft fabric covering must be protected from ultra-violet light to
prevent rapid deterioration
✔✔Fungicide - ✔✔Prevent the formation of mildew and fungus
✔✔Iron - ✔✔Used to tighten Dacron or Polyester fabric once it is applied to the aircraft
structure
QUESTIONS AND SOLUTIONS RATED A+
✔✔Softwood - ✔✔Type of wood primarily used for aircraft structure.
✔✔Solid Wood - ✔✔This form of wood is cut form a tree and dried only. No other
manufacturing takes place.
✔✔.34-.4 - ✔✔One way to evaluate the health of a piece of wood is to measure its
specific gravity range for aircraft structural wood.
✔✔1:15 - ✔✔Maximum permissible grain deviation for aircraft structural wood
✔✔Hardwood - ✔✔Broad-Leaved trees such as birch, elm, hickory, mahogany, and
maple
✔✔8-12% - ✔✔Acceptable moisture content for aircraft softwood
✔✔Laminated wood - ✔✔Form of wood consists of layers solid wood glued together
with the grains running in the same direction
✔✔Sitka Spruce - ✔✔reference softwood to which all other softwoods are compared
with regard to strength, gluing, and workability
✔✔Birch or Mahogany - ✔✔Most common type of plywood
✔✔Rib stitching or pull-type rivets - ✔✔Method to mechanically attach fabric to the wing
rib
✔✔Plywood - ✔✔Form of wood is comprised of thin layers of wood glued together with
the grain of each layer at an angle 45-90 degrees
✔✔Water and the Tightening Dope - ✔✔Used to tighten organic fabric once it is applied
to the aircraft structure
✔✔Silver Dope - ✔✔Aircraft fabric covering must be protected from ultra-violet light to
prevent rapid deterioration
✔✔Fungicide - ✔✔Prevent the formation of mildew and fungus
✔✔Iron - ✔✔Used to tighten Dacron or Polyester fabric once it is applied to the aircraft
structure
