What tool is used to verify continuity and resistance in aircraft wiring, and what reading indicates good continuity?

• A. Megohmmeter reading high
• B. Ohmmeter with very low resistance
• C. Clamp meter reading current
• D. Voltmeter reading zero

Answer: (B)

Continuity and resistance in aircraft wiring are checked with an ohmmeter. The goal is to confirm a complete electrical path with only a very small amount of resistance. A good continuity reading means the path has very low resistance, effectively near zero, indicating no breaks or poor connections. The other tools aren’t used for this purpose: a megohmmeter tests insulation resistance and will show a high reading when insulation is good (not a measure of continuity); a clamp meter measures current and won’t reveal the path’s resistance; a voltmeter reading zero simply means no voltage drop at that moment, not that the circuit is continuous. So, the best choice is using an ohmmeter and looking for a very low resistance reading.