Ontario Commercial knowledge tests (Class A–F, Z air brake) — Practice

Question 1

Why are there two service tanks in a modern air brake system?

Accepted Answer

For safety

Question 2

What is the maximum allowable length for a combination vehicle?

Accepted Answer

23 meters (75 feet)

Question 3

If you're approaching a railway crossing at which a signal device or flagperson is warning of an approaching train, you must

Accepted Answer

stop at least 5 metres (15 feet) from the nearest rail.

Question 4

The minimum following distance for a taxi or ride-hailing (e.g., Uber) vehicle is

Accepted Answer

2 seconds.

Ontario Commercial knowledge tests (Class A–F, Z air brake) — practice