Aircraft Painting

When dope proofing parts of an aircraft structure that come in contact with dope 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

1 and 4

How much does polyester shrink at 350 degrees F?

10 %

How many fabric thicknesses will be found in a french fell seam?

4

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?

A glossy, blush-free finish.

A top quality spray gun is a key component in producing a: (1) quality finish in any coating process. (2) is especially important when painting an aircraft because of the large area and varied surfaces that must be sprayed.

Both No. 1 and No. 2 are true

Where can mechanics find instructions about tying the correct knots during the rib lacing process?

Both STC's and AC 43.13

What is the appearance of a blushing paint finish?

Chalky or cloudy

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?

Corrosion.

Which seam is the strongest?

French Fell

What factors cause spray paint sags and runs?

Inadequate surface preparation or paint sprayed too thickly.

What is the purpose of reinforcing tape?

Keeps the lacing cord from cutting thru the fabric.

What does (OSHA) stand for?

Occupational Safety Hazard Administration

What finishing defect is the result of a paint room temperature that is too warm?

Pinholes or blisters

Name three common types of machine sewn seams?

Plain overlap, folded-fell and french fell

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

Polyurethane

What is the function of zinc-chromate or wash primers?

Primers serve to inhibit corrosion and provide a good bond between the metal and the topcoats.

Fabric rejuvenator is used to

Restore the condition of dope coatings.

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

Retarder

Where is reinforcing tape most commonly used?

Rib caps.

What paint gun is a conventional spray gun with a one quart paint cup located below the gun.

Siphon Feed Gun

What causes "orange peel"?

Spray pressure to high, use of a thinner that dries too fast, cold temperatures, or a damp draft over the surface.

Which of the following is a hazard associated with sanding on fabric covered surfaces during the finishing process

Static electricity buildup.

What would be the effect if dope was used over paint or enamel?

The dope tends to dissolve these materials.

What is the usual cause of runs and sags in aircraft finishes?

To much material applied in one coat.

Finishing tape (surface tape) is used for what purpose?

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

What is the proper thinner to use with zinc-chromate primer?

Toluene

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

Vne and the maximum wing loading.

What components or parts of the airframe must be protected from damage when using paint stripper?

Windsheilds and windows, plastics, composites, synthetic rubber, and fabrics.

Before applying a protective coating to any unpainted clean aluminum you should

avoid touching the surface with bare hands.

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.

Fungicidal dopes are used in aircraft finishing as the

first coat to prevent fabric rotting and are applied thin enough to saturate the fabric.

A paint booth has temperature and humidity controls; but, in all cases, the booth or hangar must have

good lighting, proper ventilation, and be dust free.

Large coating containers are used for

large painting projects such as spraying an entire aircraft

Arcing a paint gun while painting will produce a

non-uniform finish

Aluminum-pigment in dope is used primarily to

reflect ultraviolet from the fabric.

A correct use for acetone is to

remove grease from fabric.

The most significant hazards are airborne chemicals inhaled either from the vapors of opened paint containers or atomized mist resulting from spraying applications. There are two types of devices available to protect against airborne hazards:

respirators and forced-air breathing systems.