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FREE Ontario Class D/DZ Licence Test 2024 | ON
Based on the 2024 ON CDL manual
Questions: 25
Mistakes allowed: 5
Passing score: 80%
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The Ontario DZ written test is split into two parts: the Class D license knowledge test, and the Z endorsement test for air brakes. The knowledge test for Class D contains 40 multiple-choice questions about large trucks, and combination vehicles along with trucking regulations. There are two sections: 20 questions focused on road rules specific to heavy trucks and commercial vehicles, and 20 questions on associated road signs and trucking signals. The Z endorsement test, which is separate, tests knowledge of air brakes, how they operate, and how to inspect them. Thus, to acquire a DZ license, both the D license test and Z endorsement test must be passed. If you don’t pass either test, you can retake the failed one after repaying the associated fees. Looking for a free Ontario DZ practice test? Take this test below for the D license part, and this free Air Brake practice test for your Z endorsement.
4.78 out of 5 • 9 votes.
Based on 2024 ON commercial driver's license manual
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List of questions (classic view)
- In determining how well your air brake system works, which is NOT a significant factor?
- Which colour is the trailer supply line?
- When is a pre-trip inspection required?
- What gauges should you check after starting your vehicle?
- Why are there two service tanks in a modern air brake system?
- What is the purpose of the National Safety Code?
- What does this sign mean?
- In Canada, how many classes of dangerous goods are there?
- What must you do at a stop sign with a painted stop line?
- When brakes become overheated, they also become
- What does this sign mean?
- Your vehicle is equipped with an air brake system, including a belt-driven air compressor. How do you check for correct belt tension?
- What does this sign mean?
- Before driving down a grade (hill), you should
- What does this sign mean?
- Your vehicle has tandem drive axles and is equipped with an inter-axle differential. You should NOT use it if
- What does this sign mean?
- What is a commercial vehicle's danger zone?
- This sign indicates that you may park for one hour
- What is the first step of the pre-trip inspection?
- In a vehicle equipped with air brakes, the pushrod stroke occurs when compressed air enters the
- What is the Gross Vehicle Weight Rating (GVWR)?
- Driving a commercial vehicle on the road is
- In an air brake system, what does a governor do?
- Where are the air brake chambers located?