Aircraft Finishes

Question 1

1. Name the safety & health precautions to be observed in i operating a dope room, inducting storage of material.

Answer 1

Lighted
well ventilated
Spark proof motors, lights, & switches

Question 2

2. What primer is used when maximum protection of the material is desired?

Answer 2

Expoy

Question 3

3. What type of test can be performed to identify existing paint finished?

Answer 3

Apply engine oil to surface
Nitrocellulose will soften
Clean area with MEK

Question 4

4. What causes blushing when applying dope or lacquer, and how can it be prevented?

Answer 4

Applying in humid conditions, don’t do it in these conditions

Question 5

5. What is the purpose of using fungicidal dope when finishing aircraft fabric?

Answer 5

Prevent micro-biological deterioration (rotting)

Question 6

6. What are the identification marking requirements for U.S. registered fixed wing aircraft?

Answer 6

Letter N both sides of fuselage
12 inches in height
Solid lines 1/6 as thick as they are high

Question 7

7. What should the color of registration markings be?

Answer 7

Contrast their background

Question 8

8. What are the two types of dope used for aircraft finishes?

Answer 8

Nitrate & butyrate

Question 9

9. What is the advantage of butyrate over nitrate?

Answer 9

less flammable

Question 10

10. What would happen if dope was ever used over paint or enamel?

Answer 10

Lift & remove materials

Question 11

11. What is applied to metallic surfaces as a common resistant covering before the application of enamel or lacquer?

Answer 11

Zinc chromate primer

Question 12

12. What can be done to the surface of components to prevent filiform corrosion?

Answer 12

Ensure primer is cured

Question 13

13. What are the most common methods of applying aircraft finishes?

Answer 13

Dipping, brushing, spraying

Question 14

14. What type of paint may be used over any paint system that is in good condition?

Answer 14

Epoxy topcoats

Question 15

15. What normally causes runs and sags in spray application of paint finish?

Answer 15

Holding gun too long in one spot
Holding gun too close

Question 16

17. What causes fisheyes in paint?

Answer 16

Surface contamination

Question 17

18. What is used to thin chromate primer?

Answer 17

Toluene

Question 18

19. Which FAR prescribes the size and location requirements for aircraft identification numbers?

Answer 18

FAR part 45

Question 19

20. What type of materials should be thoroughly protected when using paint remover?

Answer 19

Synthetic rubber surfaces, aircraft tires, fabric, & acrylics

Question 20

21. What instructions should be followed when covering an aircraft with materials specified in an STC?

Answer 20

Instructions are included in the STC

Question 21

22. What is the principal cause for filiform corrosion?

Answer 21

Uncured primer

Question 22

23. What is zinc chromate used for?

Answer 22

Primer for bare metal

Question 23

24. What does paint blushing look like?

Answer 23

Dull & hazy surface finish

Question 24

25. What. Causes paint dust?

Answer 24

Poor surface prep & overspray

Question 25

26. What types of paint are generally used on aircraft?

Answer 25

Epoxy & enamel

Question 26

16. What causes “orange peel” or “pebble” finish?

Answer 26

Incorrect:

Spray gun setting
Air pressure
Viscosity

Or holding gun too far from work