wood, fabric, FG 2

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Explain the term Bias

A cut or fold, or seam made diagonally to the warp or fill threads

Apply to rib...

Anti-chafe tape

Which 14CFR part 43 Appendix states major and minor repairs?

Appendix A

Kevalr is Dupont trademark for what fiber?

Aramid

Most honeycomb materials are _______ that its properties are directional

Arisotropic

What additive increase flexibility and life?

rejuvenator

where is reinforcement tape used?

rib caps

Honeycomb sandwich structure are offend prepared with ______?

scarf type bonded material

Scarf type repair use ______ scarf angle to ease the load into the repair

small

What is not a FAA approved method?

the mechanical fabric test method

Prior to covering the structure must be primed. T or F

true

T or F. The same material and technique must be used when replacing fabric

true

What type of inspection is the primary method for in service inspection?

visible

What are 2 types of glue used on aircraft wood structures?

Casein and Synthetic resins

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

Circular and elliptical patches

Which statement about wood decay is correct?

Decay is not acceptable in any form

What condition can effect the signal of the radar

Entrapped water

T or F the same thread may be used to hand seam and machine seam fabric.

False

T or F. Fabric test strips should have all coating left on

False

T or F. Warp describes the direction across the width of the fabric

False

What is an individual fiber called?

Filament

What type coat is applied protect from UV light?

Fillers

Which fabric isnt available anymore?

Grade A Cotton

What do the structural properties, stiffness, dimensional stability, and strength of the composite laminate depends on?

The stack sequence of the plies

Pin knots clusters are permitted in wood structure provided

They produce a small effect in grain direction

T or F. Fabric cement is used to attach the fabric to the airframe

True

T or F. Fabric is still airworthy down to 70% of the breaking strength of new fabric

True

T or F. Only companies with a PMA may manufacture or sell aviation fabric

True

What are ceramic composites used for on aircraft?

Turbine blades

What is the key ingredient to poly-fiber covering system ?

Vinyl

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

at right angles to the grain

Major fabric repairs inspected by who?

An A&P with an IA

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

Compression failure

How much does polyester fiber shrink at 350 degrees?

10%

How many blankets does it take to cover a wing?

2

What is a typical storage life for prepreg materials

6 to 12 months

What is fiber to resin ratio?

60:40

How is aircraft wood different from laminated wood?

Laminated wood is stronger

What is the role of the matrix component in the composite material?

Matrix supports fibers and bond them together

What is considered to be a permanent repair?

Meet the strength and durability requirements

What is PMA

Part manufacture approval

What affects does moisture/humidity have on wood?

Smells, discoloration, decay, fungus

Which fabric covering system is non hazardous?

Stuart

t or f. a TSO is a technical standard order issues by the manufacture

false

What is used to improve the plie strength of the cold bond assemble

film adhesive

Any protrusion in fabric covering are reinforced with ?

gussets

What shape are honeycomb core cells?

hexagon


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