AME Troubleshooting & Repair Practices 2

Question 1

Before using an ohmmeter to check continuity in an aircraft circuit, what must the technician do?

Accepted Answer

Remove all power from the circuit

Answer

An ohmmeter supplies its own current, so external voltage can damage it and give false readings.

Question 2

With a circuit energized and the load not operating, a voltmeter across a closed switch reads nearly full system voltage. What is the most likely fault?

Accepted Answer

The switch contacts are open or have very high resistance

Answer

A good closed switch has near-zero voltage drop, so full voltage across it means the contacts are not conducting.

Question 3

An ohmmeter connected across both ends of a wire reads infinite resistance. This indicates:

Accepted Answer

An open circuit

Answer

Infinite resistance means no current path exists through the conductor.

Question 4

Which troubleshooting technique repeatedly checks a system at its midpoint to isolate a fault quickly?

Accepted Answer

Half-split method

Answer

Testing at the midpoint eliminates half of the remaining system with each check.

Question 5

Per AC 43.13-1B, the maximum resistance of a typical bonding jumper connection used for current return should not exceed:

Accepted Answer

0.003 ohm

Answer

AC 43.13-1B specifies 0.003 ohm for bonding connections that carry current.

AME - Aircraft Maintenance Engineer Practice Test

AME - Aircraft Maintenance Engineer Practice Test

AME Troubleshooting & Repair Practices 2