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

Question: 1 / 1030

Which component in an aircraft instrument vacuum system is particularly susceptible to damage from solid airborne particles?

Wet type vacuum pumps

Dry type vacuum pumps with carbon vanes

Dry type vacuum pumps with carbon vanes are particularly susceptible to damage from solid airborne particles because these types of pumps rely on the sliding action of carbon vanes to create a vacuum. Solid particles can wear down and damage the delicate carbon vanes, causing the pump to malfunction. Wet type vacuum pumps are less susceptible to damage from solid particles because they use oil to create a seal and protect the internal components. Air filters and pressure regulators are not directly involved in creating a vacuum, so they are not as vulnerable to damage from solid particles as the vacuum pumps.

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Air filters

Pressure regulators

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