FAA AMT Airframe Test 2026 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 1030

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?

Peeling of topcoat

Corrosion

If UNHYDRATED wash primer is applied to unpainted aluminum and then a finish topcoat is applied after about 30 to 40 minutes when the humidity is low, the likely outcome is corrosion. Unhydrated wash primer needs moisture to properly adhere to the surface and provide corrosion protection. In low humidity conditions, the unhydrated primer will not be able to bond correctly with the aluminum, leading to a lack of protection against corrosion. This makes option B the correct answer.

Options A, C, and D are not the best choices because peeling of the topcoat and achieving a glossy, blush-free finish are less likely outcomes when using unhydrated wash primer in low humidity conditions. Additionally, leaving the surface with no adverse effects is not the expected result when the proper conditions for primer application are not met.

Get further explanation with Examzify DeepDiveBeta

A glossy, blush-free finish

No adverse effects

Next Question

Report this question

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy