Heavy Duty Equipment Technician Red Seal Exam Prep · Question
A heavy equipment technician is using a digital multimeter to test continuity on a wiring harness disconnected from any power source. The multimeter is set to the continuity or ohm (Ω) function. What reading typically indicates good continuity (a closed circuit)?
When testing for continuity, a digital multimeter set to the continuity or ohm (Ω) function will show a reading of 0.00 Ω (or very close to zero, typically less
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Question: A heavy equipment technician is using a digital multimeter to test continuity on a wiring harness disconnected from any power source. The multimeter is set to the continuity or ohm (Ω) function. What reading typically indicates good continuity (a closed circuit)?
Answer options:
- An infinite resistance (O.L. or 1) reading. ✅ A reading of 0.00 Ω (or very close to zero) and often an audible beep.
- A fluctuating voltage reading between positive and negative terminals.
- A constant current reading above 10 Amperes.
Correct answer: A reading of 0.00 Ω (or very close to zero) and often an audible beep.
Explanation: When testing for continuity, a digital multimeter set to the continuity or ohm (Ω) function will show a reading of 0.00 Ω (or very close to zero, typically less than 0.5 Ω) and often emit an audible beep if there is an unbroken path for current flow (good continuity). An infinite resistance (O.L. or 1) indicates an open circuit. Voltage and current readings are not used to check continuity on an unpowered circuit.
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