AERO 3020 TEST 2 QUESTIONS AND VERIFIED
ANSWERS
Softwood - Answers - The type of wood primarily used for aircraft structure. These trees
tend to have needled leaves such as spruce, fir, hemlock, and cedar.
Solid Wood - Answers - This form of wood is cut from a tree and dried only. No other
manufacturing takes place.
.34 - .40 - Answers - One way to evaluate the health of a piece of wood is to measure
its specific gravity. What is the acceptable specific gravity range for aircraft structural
wood?
1 : 15 - Answers - In order for a piece of solid wood to be acceptable for use in an
aircraft structure, it must have a straight grain. What is the maximum permissible grain
deviation for aircraft structural wood?
Hardwood - Answers - The type of wood used during aircraft construction, although not
as primary structure. These are broad-leaved trees such as birch, elm, hickory,
mahogany, and maple.
8 - 12% - Answers - It is important for wood to be kiln dried to achieve the desired
moisture content. What is the acceptable moisture content of aircraft softwood?
Laminated Wood - Answers - This form of wood consists of layers of solid wood glued
together with the grains running in the same direction.
Sitka Spruce - Answers - The reference softwood to which all other softwoods are
compare with regard to strength, gluing, and workability.
Birch - Answers - What is one of the most commonly used types of aircraft plywood?
Rib Stitching - Answers - Identify one method used to mechanically attach fabric to the
wing ribs.
Plywood - Answers - This form of wood is comprised of thin layers of wood glued
together with the grain of each layer running at a right angle to the adjacent layer. To be
used certified aircraft this wood must be FAA-PMA approved
Water - Answers - What is used to tighten organic fabric once it is applied to the aircraft
structure?
ANSWERS
Softwood - Answers - The type of wood primarily used for aircraft structure. These trees
tend to have needled leaves such as spruce, fir, hemlock, and cedar.
Solid Wood - Answers - This form of wood is cut from a tree and dried only. No other
manufacturing takes place.
.34 - .40 - Answers - One way to evaluate the health of a piece of wood is to measure
its specific gravity. What is the acceptable specific gravity range for aircraft structural
wood?
1 : 15 - Answers - In order for a piece of solid wood to be acceptable for use in an
aircraft structure, it must have a straight grain. What is the maximum permissible grain
deviation for aircraft structural wood?
Hardwood - Answers - The type of wood used during aircraft construction, although not
as primary structure. These are broad-leaved trees such as birch, elm, hickory,
mahogany, and maple.
8 - 12% - Answers - It is important for wood to be kiln dried to achieve the desired
moisture content. What is the acceptable moisture content of aircraft softwood?
Laminated Wood - Answers - This form of wood consists of layers of solid wood glued
together with the grains running in the same direction.
Sitka Spruce - Answers - The reference softwood to which all other softwoods are
compare with regard to strength, gluing, and workability.
Birch - Answers - What is one of the most commonly used types of aircraft plywood?
Rib Stitching - Answers - Identify one method used to mechanically attach fabric to the
wing ribs.
Plywood - Answers - This form of wood is comprised of thin layers of wood glued
together with the grain of each layer running at a right angle to the adjacent layer. To be
used certified aircraft this wood must be FAA-PMA approved
Water - Answers - What is used to tighten organic fabric once it is applied to the aircraft
structure?
