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Ontario Straight Truck Practice Test

Ontario: Class D

Updated for 2026 · 36 straight truck questions of 327 across the full Ontario commercial path · Aligned to the commercial driver's manual · See the commercial path

Start with General Knowledge first. We recommend completing it before drilling straight truck questions.

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Heavy single-unit trucks: weights, load handling, and dump/box truck safety.

Study straight truck questions

All 36 questions in one card, each with an explanation after you answer. No timer.

Straight Truck questions

36 questions, each with an explanation.

Study mode, no timer

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Practice runs

3 runs, each a different mix of questions. Answer one at a time and see the explanation after each.

Practice run 1

Free

20 questions, a different mix in each run.

20 questions

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Practice run 2PRO20 questions, a different mix in each run.20 questionsGet ProPractice run 3PRO20 questions, a different mix in each run.20 questionsGet Pro
~26%Sample score

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About the Ontario Straight Truck test

In Ontario, this is Class D, issued by DriveTest. The questions below are labelled for Ontario, using DriveTest's own terminology and thresholds.

The straight-truck class, Class 3 in most provinces and Class D in Ontario, covers heavy single-unit trucks with three or more axles that are not pulling a separate trailer, such as dump trucks and large delivery trucks. The whole vehicle sits on one rigid frame, so the test leaves out the combination-vehicle content of the tractor-trailer class.

Instead it focuses on heavy-vehicle handling, axle and gross-weight limits, load securement under National Safety Code Standard 10, the daily inspection, and the federal Hours-of-Service rules. If the truck is equipped with air brakes, you need the air-brake endorsement as a separate result.

Ontario Straight Truck Practice Test 2026 | Drive IQ Canada