AMT: Airframe Oral & Practical Exam
Guide Exam Questions And Answers
Which species of wood is considered to be the standard when
comparing other woods for use in aircraft structure? -
correct answer ✅Sitka spruce.
Why must abrupt changes in the cross-sectional area of a wooden
structural member be avoided? -
correct answer ✅Abrupt changes in the cross sectional area of a
structural member concentrate stresses and can cause failure.
What is the basic difference between laminated wood and
plywood? -
correct answer ✅In laminated wood all of the grain runs in the
same direction, in plywood the grain in the layers cross the others
at 90° or 45° angle.
What effect does moisture have on a wood aircraft structure? -
correct answer ✅Moisture causes the wood to swell and crack as
it dries out. It allows fungus to develop in the wood and cause it to
decay.
Can northern white pine be used as a substitute for spruce? -
correct answer ✅Yes, but it must be increased in size to
compensate for its lower strength.
,AMT: Airframe Oral & Practical Exam
Guide Exam Questions And Answers
Which wood is more inclined to warp, flat grain or vertical grain? -
correct answer ✅Flat grain.
How do you detect decay in a wood structure? -
correct answer ✅Stick a sharp-pointed knife blade in the suspect
area and pry the wood up. If the wood is good, it will come up as a
long splinter; if it is decayed it will come up as a chunk.
Are mineral streaks in a piece of structural aircraft wood reason for
rejecting the wood? -
correct answer ✅No, if there is no evidence of decay in the wood.
How is compression wood identified? -
correct answer ✅It has a high specific gravity, it appears to have
the excessive growth of summerwood, and little contrast between
springwood and summerwood.
Is a hard knot, 1/2-inch in diameter allowed if it is in the web of a
wing spar? -
correct answer ✅No, 3/8-inch diameter is the maximum allowable
knot, and it must meet severe restrictions.
,AMT: Airframe Oral & Practical Exam
Guide Exam Questions And Answers
Are pin knot clusters allowable in aircraft structural wood? -
correct answer ✅Yes, if they cause only small effect on grain
direction.
What kind of glue is recommended for making repairs to a wood
aircraft structure? -
correct answer ✅Synthetic resin or resorcinol glue.
What reference material may be used for acceptable repairs to
wood aircraft structure? -
correct answer ✅AC 43.13-1B, Chapter 1.
How is a scarf splice on a wing spar reinforced? -
correct answer ✅Solid spruce or birch plywood reinforcing plates
are glued to each side of the spar, centered at each end of the scarf.
What is the correct repair to a wooden aircraft wing spar if the
wing-attach bolt holes in the spar are elongated? -
correct answer ✅Splice in a new section of the spar and drill new
holes.
, AMT: Airframe Oral & Practical Exam
Guide Exam Questions And Answers
What is the minimum taper to use when repairing a wood wing rib
cap strip? -
correct answer ✅12 times the thickness recommended, 10 times
is minimum.
How is aircraft plywood prepared for making a compound bend? -
correct answer ✅Soak the wood in hot water until it is pliable.
What is used to apply pressure to a glued joint when splicing a
wood aircraft wing spar? -
correct answer ✅Cabinetmakers' parallel clamps.
How much pressure must be applied to glue joint in the piece of
softwood to produce a strong joint? -
correct answer ✅125 to 150 pounds per square inch.
What kind of repair is recommended for a hole in the plywood skin
of an aircraft wing? -
correct answer ✅A scarf patch.
Guide Exam Questions And Answers
Which species of wood is considered to be the standard when
comparing other woods for use in aircraft structure? -
correct answer ✅Sitka spruce.
Why must abrupt changes in the cross-sectional area of a wooden
structural member be avoided? -
correct answer ✅Abrupt changes in the cross sectional area of a
structural member concentrate stresses and can cause failure.
What is the basic difference between laminated wood and
plywood? -
correct answer ✅In laminated wood all of the grain runs in the
same direction, in plywood the grain in the layers cross the others
at 90° or 45° angle.
What effect does moisture have on a wood aircraft structure? -
correct answer ✅Moisture causes the wood to swell and crack as
it dries out. It allows fungus to develop in the wood and cause it to
decay.
Can northern white pine be used as a substitute for spruce? -
correct answer ✅Yes, but it must be increased in size to
compensate for its lower strength.
,AMT: Airframe Oral & Practical Exam
Guide Exam Questions And Answers
Which wood is more inclined to warp, flat grain or vertical grain? -
correct answer ✅Flat grain.
How do you detect decay in a wood structure? -
correct answer ✅Stick a sharp-pointed knife blade in the suspect
area and pry the wood up. If the wood is good, it will come up as a
long splinter; if it is decayed it will come up as a chunk.
Are mineral streaks in a piece of structural aircraft wood reason for
rejecting the wood? -
correct answer ✅No, if there is no evidence of decay in the wood.
How is compression wood identified? -
correct answer ✅It has a high specific gravity, it appears to have
the excessive growth of summerwood, and little contrast between
springwood and summerwood.
Is a hard knot, 1/2-inch in diameter allowed if it is in the web of a
wing spar? -
correct answer ✅No, 3/8-inch diameter is the maximum allowable
knot, and it must meet severe restrictions.
,AMT: Airframe Oral & Practical Exam
Guide Exam Questions And Answers
Are pin knot clusters allowable in aircraft structural wood? -
correct answer ✅Yes, if they cause only small effect on grain
direction.
What kind of glue is recommended for making repairs to a wood
aircraft structure? -
correct answer ✅Synthetic resin or resorcinol glue.
What reference material may be used for acceptable repairs to
wood aircraft structure? -
correct answer ✅AC 43.13-1B, Chapter 1.
How is a scarf splice on a wing spar reinforced? -
correct answer ✅Solid spruce or birch plywood reinforcing plates
are glued to each side of the spar, centered at each end of the scarf.
What is the correct repair to a wooden aircraft wing spar if the
wing-attach bolt holes in the spar are elongated? -
correct answer ✅Splice in a new section of the spar and drill new
holes.
, AMT: Airframe Oral & Practical Exam
Guide Exam Questions And Answers
What is the minimum taper to use when repairing a wood wing rib
cap strip? -
correct answer ✅12 times the thickness recommended, 10 times
is minimum.
How is aircraft plywood prepared for making a compound bend? -
correct answer ✅Soak the wood in hot water until it is pliable.
What is used to apply pressure to a glued joint when splicing a
wood aircraft wing spar? -
correct answer ✅Cabinetmakers' parallel clamps.
How much pressure must be applied to glue joint in the piece of
softwood to produce a strong joint? -
correct answer ✅125 to 150 pounds per square inch.
What kind of repair is recommended for a hole in the plywood skin
of an aircraft wing? -
correct answer ✅A scarf patch.
