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

Question: 1 / 1030

If a bladder type fuel tank is to be left empty for an extensive period of time, what should the inside of the tank be coated with?

Water

Engine oil

A bladder type fuel tank is not designed to hold any of these substances, so it is important to choose the right one. Water, alcohol, and hydraulic fluid can potentially damage the tank and its lining. Water can cause rust and corrosion, alcohol can deteriorate the bladder material, and hydraulic fluid can harden and crack the bladder. Engine oil is the best option as it will not damage the tank and can help prevent rust and corrosion. It also provides lubrication for the bladder, preventing it from drying out and cracking.

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Alcohol

Hydraulic fluid

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