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

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.

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.