Wood

where is information found concerning acceptable species substitutions for wood materials used in aircraft repair?

AC 43.13-1B

which of the following conditions will determine acceptance of wood with mineral streaks

Careful inspection fails to reveal any decay.

Which statement about wood decay is correct?

Decay is not acceptable in any form or amount.

what does the term bias mean in relation to fabric coverings

a cut or fold made at a diagonal to the wrap

which tape is already preshrunk

surface tape

what could happen if the paint material is not properly mixed

wrinkles

how much does polyester fabric shrink at 350 F

10%

the registration marks must be at least ____ inched high. a glider may display marks at least ___ inches

12 inches, 3 inches

how many blankets does it usually take to cover a wing

2

critical airflow areas such as the leading edge require how many inches of overlap at the seam

2-4

aircraft with a V of 135 mph or less are considered to be unairworthy when the fabric breaking strength has deteriorated to below

35 lbs

with 12" high registration marks, what is the minimum space required for the registration mark N1683C

52 inches

what should be applied to rib caps that are not rounded over

anti chafe tape

Compression daily res in wood aircraft structures are characterized by buckling of the fibers that appear as streaks on the surface

at the right angles grain

before applying a protective coating to any unpainted clean aluminum, you should

avoid touching the surface with bare hands

Which defect in aircraft finishes may be caused by adverse humidity, drafts, or sudden changes in temperature?

blushing

what could happen if the to be painted surface is not clean and free of any type of contaminants?

fisheyes could appear on the surface

The strength of a well-designed and properly prepared wood splice joint is provided by the

glue

which of the following fabrics is no longer available

grade A cotton

aircraft with wing loading of 9lb/ft and over should have fabric strength at or above

grade a

which of the following is used to create reinforced drain holes in aircraft fabric

grommet

any protrusions in the fabric covering are reinforced with

gussets

the determining factor for the selection of the correct weight of textile fabric to be used in covering any type of aircraft is the

speed of the aircraft and the maximum wing loading

a rough surface that feels like sandpaper is an indication of?

spray dust

which of the following is a hazard associated with sanding on fabric surfaces during the finishing process?

static electricity buildup

when is accelerator used when applying fabric topcoats?

temperatures below ideal working temperatures

A spray gun that uses lower pressure and higher volumes of air is called a

.....

the pressure used for hvlp spray gun is ____ the pressure used for a traditional spray gun

.....

where can technicians find instructions about tying the correct knots during the rib lacing process

Both

In cases of eking ated boltholes in a wood spar or cracks in the vicinity of boltholes,

a new section of spar should be spliced in or the spar replaced entirely

which fabric covering system is non hazardous

Stewart

major fabric repairs need to be inspected by

airframe and powerplant with IA

what type of coating is applied to protect the fabric from the UV light

filler

Finishing tape is used for what purpose?

To provide additional wear resistance over the edges of fabric forming structures.

which 14 cfr part 43 appendix states what maintenance actions are considered minor and major repairs

a

what is likely to occur if I hydrated wash primer is applied to unpainted aluminum and then about 30-40 minutes later a finish topcoat, when the humidity is low?

a glossy, blush free finish

recovering a fabric aircraft is considered

a major repair or alteration

When patching a plywood skin, abrupt changes in cross-sectional areas which will develop dangerous stress concentration should be avoided by using

circular or elliptical patches

A faint line running across the grain of a wood spar generally indicates

compression failure

which of the following repairs require sewing

cotton fabric repairs

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

cure to the finish and be very difficult to remove

Aluminum-pigment in dope is used primarily to

exclude sunlight from the fabric

where is reinforcing tape most commonly used

rib caps

which of the following is not FAA approved method of testing

mechanical fabric strength testers

Laminated wood is sometimes used in the construction of highly stressed aircraft components. This wood can be identified by its

parallel grain construction

Which properly applied finish topcoat is the most durable and chemical resistant?

polyurethane

The I-beam wooden spar is routed to

reduce weight

What is used to slow the drying time of some finishes and to prevent blush?

reducer

what additive increases the overall flexibility and life of a coating

rejuvenator

Pin knot clusters are permitted in wood aircraft structure provided

they produce a small effect on grain direction

what is the usual cause of runs and sags in aircraft finishes

too much material applied in one coat

what is the key ingredient in the poly fiber covering system

vinyl

Which type of coating typically includes phosphoric acid as one of its components at the time of application?

wash primer

Glue deterioration in wood aircraft structure is indicated

when a joint has separated and the glue surface shows only the imprint of the wood with no wood fibers clinging to the glue