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The pilot smells burning insulation and suspects an electrical fire. What is the general response?

Choices

✓ Turn the master and nonessential electrical equipment off to remove the sourcecorrect
Removing power isolates the electrical source of the fire.
Turn on all electrical equipment to find the fault
Adding load feeds an electrical fire.
Increase throttle to run the alternator harder
More electrical output worsens an electrical fire.
Ignore it unless a breaker trips
The smell of burning insulation is itself a warning that requires action.

Why

For an electrical fire, the pilot removes the source by switching the master and nonessential equipment off, ventilates smoke, and conserves battery power for essential equipment.

FAA source: PHAK / electrical failure and smokebrowse the reference library →

This is taught in Fire, Smoke and Electrical Failures — study the lessons free, then practice with grading and mastery tracking.

Original study question written for this course — representative of FAA knowledge-test topics, not an actual current FAA exam question.