Ontario Bus Driver Knowledge Practice Test 2025 - Free Bus Driver Practice Questions and Study Guide

Question: 1 / 400

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

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.

Get further explanation with Examzify DeepDiveBeta

The pedal should vibrate

Next Question

Report this question

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy