AIRFRAME ASA ALL QUESTIONS AND
ANSWERS
Laminated wood spars may be substituted for solid rectangular wood spars . - Correct
Answers -if the same quality wood is used in both.
The strength of a well-designed and properly prepared wood splice joint is provided by
the . - Correct Answers -glue.
Where is information found concerning acceptable species substitutions for wood
materials used in aircraft repair? - Correct Answers -AC 43.13-1B.
In cases of elongated boltholes in a wood spar or cracks in the vicinity of boltholes, . -
Correct Answers -a new section of spar should be spliced in or the spar replaced
entirely.
A faint line running across the grain of a wood spar generally indicates - Correct
Answers -compression failure.
Which statement about wood decay is correct? - Correct Answers -Decay is not
acceptable in any form or amount.
Which of the following conditions will determine acceptance of wood with mineral
streaks? - Correct Answers -Careful inspection fails to reveal any decay.
The I-beam wooden spar is routed to - Correct Answers -reduce weight.
Pin knot clusters are permitted in wood aircraft structure provided - Correct Answers -
they produce a small effect on grain direction.
The cantilever wing uses - Correct Answers -no external bracing.
Laminated wood is sometimes used in the construction of highly stressed aircraft
components. This wood can be identified by its - Correct Answers -parallel grain
construction.
When patching a plywood skin, abrupt changes in cross-sectional areas which will
develop dangerous stress concentration should be avoided by using - Correct Answers
-circular or elliptical patches..
,Glue deterioration in wood aircraft structure is indicated - Correct Answers -when a joint
has separated and the glue surface shows only the imprint of the wood with no wood
fibers clinging to the glue.
Compression failures in wood aircraft structures are characterized by buckling of the
fibers that appear as streaks on the surface - Correct Answers -at right angles to the
grain.
When and how is finishing tape applied on a fabric-covered aircraft? - Correct Answers -
Doped on after the first or second coat of dope.
The determining factor(s) for the selection of the correct weight of textile fabric to be
used in covering any type of aircraft is the - Correct Answers -speed of the aircraft and
the maximum wing loading.
How many fabric thicknesses will be found in a French-fell seam? - Correct Answers -
Four.
Finishing tape (surface tape) is used for what purpose? - Correct Answers -To provide
additional wear resistance over the edges of fabric forming structures.
Moisture, mildew, chemicals, and acids have no effect on - Correct Answers -glass
fabric.
The best method of repair for a fabric-covered surface which has an L-shaped tear,
each leg of which is approximately 14 inches long, is to - Correct Answers -sew with a
baseball stitch from the center of the tear out toward the extremity of each leg and then
dope on a patch.
The strength classification of fabrics used in aircraft covering is based on - Correct
Answers -tensile strength.
Fabric rejuvenator is used to - Correct Answers -restore the condition of dope coatings.
(1) Machine-sewn seams in aircraft covering fabrics may be of the folded-fell or French-
fell types.
(2) A plain lapped seam is never permissible.
Regarding the above statements, - Correct Answers -Only 1 is true:
Machine-sewn seams in aircraft covering fabrics may be of the folded-fell or French-fell
types
When testing the strength of Grade A cotton fabric covering an aircraft that requires only
intermediate grade, the minimum acceptable strength the fabric must have is - Correct
Answers -70 percent of the original strength for intermediate fabric.
,When dope-proofing the parts of the aircraft structure that come in contact with doped
fabric, which of the following provide an acceptable protective coating?
1. Aluminum foil.
2. Resin impregnated cloth tape.
3. Any one-part type metal primer.
4. Cellulose tape. - Correct Answers -1 and 4
Aluminum foil
and
Cellulose tape
If registration numbers are to be applied to an aircraft with a letter height of 12 inches,
what is the minimum space required for the registration mark N1683C?
Note:
2/3 x height = character width.
1/6 x height = width for 1.1/4 x 2/3 height = spacing.
1/6 x height = stroke or line width. - Correct Answers -52 inches.
If masking tape is applied to an aircraft such as for trim spraying, and is left on for
several days and/or exposed to heat, it is likely that the tape will - Correct Answers -
cure to the finish and be very difficult to remove.
What is used to slow the drying time of some finishes and to prevent blush? - Correct
Answers -Retarder.
Which type of coating typically includes phosphoric acid as one of its components at the
time of application? - Correct Answers -Wash primer.
Which properly applied finish topcoat is the most durable and chemical resistant? -
Correct Answers -Polyurethane.
Aluminum-pigment in dope is used primarily to - Correct Answers -reflect ultraviolet from
the fabric.
A correct use for acetone is to - Correct Answers -remove grease from fabric.
Which of the following is a hazard associated with sanding on fabric covered surfaces
during the finishing process? - Correct Answers -Static electricity buildup.
What is likely to occur if unhydrated wash primer is applied to unpainted aluminum and
then about 30 to 40 minutes later a finish topcoat, when the humidity is low? - Correct
Answers -Corrosion.
Fungicidal dopes are used in aircraft finishing as the - Correct Answers -first coat to
prevent fabric rotting and are applied thin enough to saturate the fabric.
, Before applying a protective coating to any unpainted clean aluminum, you should -
Correct Answers -avoid touching the surface with bare hands.
What is likely to occur if hydrated wash primer is applied to unpainted aluminum and
then about 30 to 40 minutes later a finish topcoat, when the humidity is low? - Correct
Answers -A glossy, blush-free finish.
What is the usual cause of runs and sags in aircraft finishes? - Correct Answers -Too
much material applied in one coat.
Which defect in aircraft finishes may be caused by adverse humidity, drafts, or sudden
changes in temperature? - Correct Answers -Blushing.
Which statement is true regarding paint system compatibility? - Correct Answers -Old
wash primer coats may be overcoated directly with epoxy finishes.
A well-designed rivet joint will subject the rivets to - Correct Answers -shear loads.
A main difference between Lockbolt/Huckbolt tension and shear fasteners (other than
their application) is in the - Correct Answers -number of locking collar grooves.
Alloy 2117 rivets are heat treated - Correct Answers -by the manufacturer and do not
require heat treatment before being driven.
The general rule for finding the proper rivet diameter is - Correct Answers -three times
the thickness of the thickest sheet.
The shop head of a rivet should be - Correct Answers -one and one-half times the
diameter of the rivet shank.
One of the main advantages of Hi-Lok type fasteners over earlier generations is that -
Correct Answers -they can be installed with ordinary hand tools.
The markings on the head of a Dzus fastener identify the - Correct Answers -body
diameter, type of head, and length of the fastener.
The Dzus turnlock fastener consists of a stud, grommet, and receptacle. The stud
length is measured in - Correct Answers -hundredths of an inch.
The Dzus turnlock fastener consists of a stud, grommet, and receptacle. The stud
diameter is measured in - Correct Answers -sixteenths of an inch.
Threaded rivets (Rivnuts) are commonly used to - Correct Answers -attach parts or
components with screws to sheet metal.
ANSWERS
Laminated wood spars may be substituted for solid rectangular wood spars . - Correct
Answers -if the same quality wood is used in both.
The strength of a well-designed and properly prepared wood splice joint is provided by
the . - Correct Answers -glue.
Where is information found concerning acceptable species substitutions for wood
materials used in aircraft repair? - Correct Answers -AC 43.13-1B.
In cases of elongated boltholes in a wood spar or cracks in the vicinity of boltholes, . -
Correct Answers -a new section of spar should be spliced in or the spar replaced
entirely.
A faint line running across the grain of a wood spar generally indicates - Correct
Answers -compression failure.
Which statement about wood decay is correct? - Correct Answers -Decay is not
acceptable in any form or amount.
Which of the following conditions will determine acceptance of wood with mineral
streaks? - Correct Answers -Careful inspection fails to reveal any decay.
The I-beam wooden spar is routed to - Correct Answers -reduce weight.
Pin knot clusters are permitted in wood aircraft structure provided - Correct Answers -
they produce a small effect on grain direction.
The cantilever wing uses - Correct Answers -no external bracing.
Laminated wood is sometimes used in the construction of highly stressed aircraft
components. This wood can be identified by its - Correct Answers -parallel grain
construction.
When patching a plywood skin, abrupt changes in cross-sectional areas which will
develop dangerous stress concentration should be avoided by using - Correct Answers
-circular or elliptical patches..
,Glue deterioration in wood aircraft structure is indicated - Correct Answers -when a joint
has separated and the glue surface shows only the imprint of the wood with no wood
fibers clinging to the glue.
Compression failures in wood aircraft structures are characterized by buckling of the
fibers that appear as streaks on the surface - Correct Answers -at right angles to the
grain.
When and how is finishing tape applied on a fabric-covered aircraft? - Correct Answers -
Doped on after the first or second coat of dope.
The determining factor(s) for the selection of the correct weight of textile fabric to be
used in covering any type of aircraft is the - Correct Answers -speed of the aircraft and
the maximum wing loading.
How many fabric thicknesses will be found in a French-fell seam? - Correct Answers -
Four.
Finishing tape (surface tape) is used for what purpose? - Correct Answers -To provide
additional wear resistance over the edges of fabric forming structures.
Moisture, mildew, chemicals, and acids have no effect on - Correct Answers -glass
fabric.
The best method of repair for a fabric-covered surface which has an L-shaped tear,
each leg of which is approximately 14 inches long, is to - Correct Answers -sew with a
baseball stitch from the center of the tear out toward the extremity of each leg and then
dope on a patch.
The strength classification of fabrics used in aircraft covering is based on - Correct
Answers -tensile strength.
Fabric rejuvenator is used to - Correct Answers -restore the condition of dope coatings.
(1) Machine-sewn seams in aircraft covering fabrics may be of the folded-fell or French-
fell types.
(2) A plain lapped seam is never permissible.
Regarding the above statements, - Correct Answers -Only 1 is true:
Machine-sewn seams in aircraft covering fabrics may be of the folded-fell or French-fell
types
When testing the strength of Grade A cotton fabric covering an aircraft that requires only
intermediate grade, the minimum acceptable strength the fabric must have is - Correct
Answers -70 percent of the original strength for intermediate fabric.
,When dope-proofing the parts of the aircraft structure that come in contact with doped
fabric, which of the following provide an acceptable protective coating?
1. Aluminum foil.
2. Resin impregnated cloth tape.
3. Any one-part type metal primer.
4. Cellulose tape. - Correct Answers -1 and 4
Aluminum foil
and
Cellulose tape
If registration numbers are to be applied to an aircraft with a letter height of 12 inches,
what is the minimum space required for the registration mark N1683C?
Note:
2/3 x height = character width.
1/6 x height = width for 1.1/4 x 2/3 height = spacing.
1/6 x height = stroke or line width. - Correct Answers -52 inches.
If masking tape is applied to an aircraft such as for trim spraying, and is left on for
several days and/or exposed to heat, it is likely that the tape will - Correct Answers -
cure to the finish and be very difficult to remove.
What is used to slow the drying time of some finishes and to prevent blush? - Correct
Answers -Retarder.
Which type of coating typically includes phosphoric acid as one of its components at the
time of application? - Correct Answers -Wash primer.
Which properly applied finish topcoat is the most durable and chemical resistant? -
Correct Answers -Polyurethane.
Aluminum-pigment in dope is used primarily to - Correct Answers -reflect ultraviolet from
the fabric.
A correct use for acetone is to - Correct Answers -remove grease from fabric.
Which of the following is a hazard associated with sanding on fabric covered surfaces
during the finishing process? - Correct Answers -Static electricity buildup.
What is likely to occur if unhydrated wash primer is applied to unpainted aluminum and
then about 30 to 40 minutes later a finish topcoat, when the humidity is low? - Correct
Answers -Corrosion.
Fungicidal dopes are used in aircraft finishing as the - Correct Answers -first coat to
prevent fabric rotting and are applied thin enough to saturate the fabric.
, Before applying a protective coating to any unpainted clean aluminum, you should -
Correct Answers -avoid touching the surface with bare hands.
What is likely to occur if hydrated wash primer is applied to unpainted aluminum and
then about 30 to 40 minutes later a finish topcoat, when the humidity is low? - Correct
Answers -A glossy, blush-free finish.
What is the usual cause of runs and sags in aircraft finishes? - Correct Answers -Too
much material applied in one coat.
Which defect in aircraft finishes may be caused by adverse humidity, drafts, or sudden
changes in temperature? - Correct Answers -Blushing.
Which statement is true regarding paint system compatibility? - Correct Answers -Old
wash primer coats may be overcoated directly with epoxy finishes.
A well-designed rivet joint will subject the rivets to - Correct Answers -shear loads.
A main difference between Lockbolt/Huckbolt tension and shear fasteners (other than
their application) is in the - Correct Answers -number of locking collar grooves.
Alloy 2117 rivets are heat treated - Correct Answers -by the manufacturer and do not
require heat treatment before being driven.
The general rule for finding the proper rivet diameter is - Correct Answers -three times
the thickness of the thickest sheet.
The shop head of a rivet should be - Correct Answers -one and one-half times the
diameter of the rivet shank.
One of the main advantages of Hi-Lok type fasteners over earlier generations is that -
Correct Answers -they can be installed with ordinary hand tools.
The markings on the head of a Dzus fastener identify the - Correct Answers -body
diameter, type of head, and length of the fastener.
The Dzus turnlock fastener consists of a stud, grommet, and receptacle. The stud
length is measured in - Correct Answers -hundredths of an inch.
The Dzus turnlock fastener consists of a stud, grommet, and receptacle. The stud
diameter is measured in - Correct Answers -sixteenths of an inch.
Threaded rivets (Rivnuts) are commonly used to - Correct Answers -attach parts or
components with screws to sheet metal.
