A relative compression test uses a DSO to monitor ________ to determine the relative compression of each cylinder in the engine while it is being cranked.

Question

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A relative compression test using a Digital Storage Oscilloscope (DSO) monitors the battery draw by the starter motor to determine the relative compression of each cylinder. This method assesses how much current the starter motor uses while cranking the engine. Variations in current draw can indicate differences in cylinder compression, as cylinders with lower compression require less effort (and thus less current) to crank.

A Relative Compression Test Uses a DSO to Monitor ________