Aircraft Painting and Finishing - Test Guide

A- cure to the finish and be very difficult to remove (Masking tape should not be allowed to remain on any longer than necessary. If it is difficult to remove, try to soak the tape free with aliphatic naphtha.)

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 A- cure to the finish and be very difficult to remove B- not seal out the finishing material if the delay or heating occurs before spraying C- be weakened in its ability to adhere to the surface

C- remove grease from fabric (Acetone is a fast-evaporating dope solvent that is suitable for removing grease from fabric prior to doping.)

A correct use for acetone is to A- thin zinc chromate primer B- thin dope C- remove grease from fabric

A- reflect ultraviolet from the fabric (Aluminum pigment is mixed with clear dope and applied to fabric surfaces to help combat the deterioration caused by sunlight.)

Aluminum-pigment in dope is used primarily to A- reflect ultraviolet from the fabric B- aid in sealing out moisture from the fabric C- provide a silver color

B- avoid touching the surface with bare hands (Moisture, skin oils and other contaminants may be left on a surface when you touch it.To prevent problems with the finishing system you should avoid touching surfaces after the final cleaning or wipedown with M.E.K.)

Before applying a protective coating to any unpainted clean aluminum you should, A- wipe the surface with avgas or kerosene B- avoid touching the surface with bare hands C- remove any conversion coating film

B- first coat to prevent fabric rotting and are applied thin enough to saturate the fabric (Fungicidal dope normally is used as the first coat for fabrics to prevent rotting. The first coat is applied extremely thin so it can thoroughly saturate both sides of the fabric.)

Fungicidal dopes are used in aircraft finishing as the A- final, full-bodied, brushed-on coat to reduce blushing B- first coat to prevent fabric rotting and are applied thin enough to saturate the fabric C- first, full-bodied, brushed-on coat to prevent fungus damage

B- 52 inches (For 12-inch characters the width will be 2/3 of 12, which equals 8 inches. The 1 will be 2 inches wide, and the spacing will be 1/4 of 8 inches, or 2 inches. This will give us 8+24+24+2+8+24+8+2+8+2+8, or52 inches.)

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 A- 48 inches B- 52 inches C- 57 inches

A- A glossy, blush-free finish (This is the proper method of wash primer usage. One of the most critical aspects of the application of wash primer is the necessity of having sufficient moisture in the air. This moisture is required to properly convert the acid into a phosphate film. This process should take about 30-minutes.)

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- A glossy, blush-free finish B- A dull finish due to the topcoat "sinking in" to primer that is still too soft C- Corrosion

B- Corrosion (one of the most critical aspects of the application of wash primer is the necessity of having sufficient moisture in the air. This moisture is required to properly convert the acid into a phosphate film. This process should take about 30-minutes.)

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? A- a dull finish due to the topcoat "sinking in" to primer that is still too soft B- Corrosion C- A glossy, blush-free finish

B- Too much material applied in one coat (Sags and runs result from too much paint being applied, causing the film of wet paint to move by gravity, and presenting a sagging appearance.)

What is the usual cause of runs and sags in aircraft finishes? A- Low atmospheric humidity B- Too much material applied in one coat C- Material is being applied too fast

B- Retarder (Retarder is a special type of thinner having rich solvents. These dry very slowly and prevent the temperature drop at the surface which causes blush.)

What is used to slow the drying time of some finishes and to prevent blush? A-Reducer B- Retarder C- Rejuvenator

C- blushing (Blushing occurs because of the effects of high humidity and the temperature drop during the evaporation of the solvents in the dope. Anything which affects either the humidity or the speed of solvent evaporation could cause blushing.)

Which defect in aircraft finishes may be caused by adverse humidity, drafts, or sudden changes in temperature? A- orange peel B- pinholes C- blushing

B- Static electricity buildup (When dry sanding a fabric covered aircraft, be sure to electrically ground the structure. Static electricity from sanding can cause a spark to jump inside the structure and ignite volatile fumes.)

Which of the following is a hazard associated with sanding on fabric covered surfaces during the finishing process? A- Overheating of the fabric/finish, especially with the use of power tools B- Static electricity buildup C- Embedding of particles in the finish

B- Polyurethane (Polyurethane provides the most durable and chemically resistant finish. Polyurethane is a two-part chemically cured finish that has a solids content of up to 60%. The high gloss that is characteristic of these finishes is due to the slow-flowing resins used.)

Which properly applied finish topcoat is the most durable and chemical resistant? A- Synthetic enamel B- Polyurethane C- Acrylic lacquer

C- Old wash primer coats may be overcoated directly with epoxy finishes (Old wash primer coats may be overcoated directly with epoxy finishes. A new second coat of wash primer must be applied if an acrylic finish is to be applied.)

Which statement is true regarding paint system compatibility? A- Acrylic nitrocellulose lacquers may be used over old nitrocellulose finishes B- Old type zinc chromate primer may not be used directly for touchup of bare metal surfaces C- Old wash primer coats may be overcoated directly with epoxy finishes

A- Wash primer (As one component of their system, wash primers use phosphoric acid to create a phosphate film on the surface of the aluminum.)

Which type of coating typically includes phosphoric acid as one of its components at the time of application? A- Wash primer B- Epoxy primer C- Zinc chromate primer