Ontario Bus Driver Knowledge Practice Test

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Prepare for the Ontario Bus Driver Test with targeted flashcards and multiple choice questions. Each question includes hints and explanations. Be ready to pass with confidence!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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When testing a hydraulic brake with power assist, what should happen when you turn the engine on?

The pedal should remain static
The pedal should lift slightly
The pedal should drop slightly
The pedal should vibrate

The correct answer is: The pedal should drop slightly

When testing a hydraulic brake with power assist, when you turn the engine on, the pedal should drop slightly. This is because the power assist uses engine-generated vacuum to assist with brake pedal pressure. As the engine turns on, the vacuum produced causes a slight drop in the pedal as the brake system is activated. Options A and B are incorrect because the pedal should not remain static or lift when the engine is turned on. Option D is incorrect because the pedal should not vibrate when the engine is turned on.