Painting Sample Test

1. 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. Corrosion.
c. A dull finish due to the topcoat 'sinking in' to primer that is still too soft.

2. Aluminum-pigment in dope is used primarily to
a. reflect ultraviolet from the fabric.
b. provide a silver color.
c. aid in sealing out moisture from the fabric.

3. A correct use for acetone is to
a. thin dope.
b. remove grease from fabric.
c. thin zinc chromate primer.

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

5. 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.

6. What is used to slow the drying time of some finishes and to prevent blush?
a. Retarder.
b. Reducer.
c. Rejuvenator.

7. 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. A glossy, blush-free finish.
c. Corrosion.

8. Which properly applied finish topcoat is the most durable and chemical resistant?
a. Polyurethane.
b. Acrylic lacquer.
c. Synthetic enamel.

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

10. Which defect in aircraft finishes may be caused by adverse humidity, drafts, or sudden changes in temperature?
a. Pinholes.
b. Blushing.
c. Orange peel.

11. What is the usual cause of runs and sags in aircraft finishes?
a. Too much material applied in one coat.
b. Low atmospheric humidity.
c. Material is being applied too fast.

12. Fungicidal dopes are used in aircraft finishing as the
a. first coat to prevent fabric rotting and are applied thin enough to saturate the fabric.
b. first, full-bodied, brushed-on coat to prevent fungus damage.
c. final, full-bodied, brushed-on coat to reduce blushing.

13. 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. 57 inches.
b. 52 inches.
c. 48 inches.

14. Which type of coating typically includes phosphoric acid as one of its components at the time of application?
a. Epoxy primer.
b. Zinc chromate primer.
c. Wash primer.

15. 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.

Answers:
1. - a
2. - a
3. - b
4. - b
5. - a
6. - a
7. - c
8. - a
9. - c
10. - b
11. - a
12. - a
13. - b
14. - c
15. - b