Marine Electrical Systems USCG Question #447 (Set 15)

A capacitor is to be tested with a digital multimeter set up to measure ohms. If the meter is connected to a shorted capacitor, how would the meter display respond?

Official USCG Answer & Rule Citation

Correct Answer: Option C — immediately display a very low resistance value which remains low

Internal plate degradation or dielectric failure creates a direct internal short within a capacitor. When tested with an ohmmeter, the meter immediately registers a very low resistance value and stays low, distinguishing it from a healthy capacitor that charges and shows rising resistance.

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