FAA AMT Airframe Test 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 1030

The coefficient of expansion of most plastic enclosure materials is

Less than steel but greater than aluminum

The same as steel and aluminum

Less than both steel and aluminum

Greater than both steel and aluminum

The coefficient of expansion refers to how much a material will expand or contract with changes in temperature. In this case, the correct answer is D because most plastic enclosure materials have a greater coefficient of expansion compared to steel and aluminum. This means that when exposed to temperature changes, plastic enclosures will expand or contract more than steel or aluminum enclosures. This property is important to consider in aviation maintenance to ensure that components will fit properly and continue to function as intended despite temperature variations.

Options A, B, and C are not correct because they do not accurately describe the typical behavior of plastic enclosure materials in terms of their coefficient of expansion when compared to steel and aluminum.

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