Practice question

When trying to put out an electrical fire:

  1. Use water.
  2. Use a B or C extinguisher.
  3. Use an X extinguisher.
  4. Use a Q extinguisher.

Answer: B — Use a B or C extinguisher.

The correct answer is shown above. Try the full quiz for additional practice.

Practice more: Indiana CDL Class B Knowledge Test 1 →