Question 158Electricity & Electronics - QMED

70% to pass

A digital multimeter is set up as an ohmmeter on the 1 kilo ohm scale. What does a display reading of 'OL' ohms as read across the ends of a wire conductor indicate?

Aa partial short
Bopen circuit
Ccontinuity
Da partial ground
AI Explanation

The correct answer is B) open circuit. When a digital multimeter is set to the ohmmeter function and the 1 kilo ohm scale, a display reading of 'OL' (for 'overload') indicates that the resistance measured across the wire conductor is beyond the maximum range of the ohmmeter scale, which is typically infinity or an open circuit. This means there is no continuity or connection through the wire, and it is an open circuit. The other options are incorrect because: A) a partial short would result in a low resistance reading, not an 'OL' display; C) continuity would result in a low resistance reading, not an 'OL' display; and D) a partial ground would also result in a low resistance reading, not an 'OL' display.

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Official Resources
46 CFR Electrical Engineering 46 CFR Machinery & Electrical USCG National Maritime Center
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