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3 Aircraft Finishes

QuestionAnswer
Which type of coating typically includes phosphoric acid as one of its components at the time of application? Wash primer.
Aluminum pigment in dope is used primarily to reflect ultraviolet from the fabric.
Which statement is true regarding paint system compatibility? Old wash primer coats may be overcoated directly with epoxy finishes.
What is the usual cause of runs and sags in aircraft finishes? Too much material applied in one coat.
When humidity is low, what is likely to occur if hydrated wash primer is applied to unpainted aluminum and then, 30 to 40 minutes later, a finish top coat is applied? A glossy, blush-free finish.
Which defect in aircraft finishes may be caused by adverse humidity, drafts, or sudden changes in temperature? Blushing.
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.
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? 52 inches.
Which of the following is a hazard associated with sanding on fabric covered surfaces during the finishing process? Static electricity buildup.
A correct use for acetone is to remove grease from fabric.
Which properly applied finish topcoat is the most durable and chemical resistant? Polyurethane.
Before applying a protective coating to any unpainted clean aluminum, you should avoid touching the surface with bare hands.
When humidity is low, 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 is applied? Corrosion.
Fungicidal dopes are used in aircraft finishing as the first coat to prevent fabric rotting and are applied thin enough to saturate the fabric.
What is used to slow the drying time of some finishes and to prevent blush? Retarder.
Created by: Jack Mollohan
 

 



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