FAA Powerplant Written Practice Test 2025 – Complete Exam Prep

Question: 1 / 1165

Which tool is commonly used to measure crankshaft rotation in degrees?

Torque wrench

Timing disk

The timing disk is specifically designed to measure crankshaft rotation in degrees, which is critical for accurately setting the timing of an engine. It typically consists of a circular disc that has degree markings around its edge, allowing a technician to determine the exact position of the crankshaft in relation to the engine's timing events, such as ignition timing or valve timing.

This tool is essential for tasks such as adjusting ignition timing or verifying the alignment of certain engine components that depend on precise crankshaft positioning. Unlike other tools mentioned, such as a torque wrench, socket set, or measuring tape, the timing disk serves a unique function directly related to the angular measurement of the crankshaft, making it the most suitable choice for this purpose.

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Socket set

Measuring tape

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