Based on the Red Seal Heavy Equipment Operator (Dozer) exam blueprint: safe work, inspection and maintenance, dozer operation, grading, ripping and pushing material
Practice on the go and jump straight back to where you left off.
About the certification
In Ontario, Heavy Equipment Operator – Dozer is trade code 636C, a non-compulsory trade administered by Skilled Trades Ontario. The apprenticeship is 2,560 hours: 2,260 on the job and 300 in school. Across Canada it is the Red Seal trade Heavy Equipment Operator (Dozer), so passing the Certificate of Qualification exam also earns the interprovincial Red Seal endorsement.
The Red Seal exam has 100 multiple-choice questions in 3 blocks: common occupational skills (24 questions), dozer inspection and basic maintenance (26) and dozer operator tasks (50). Operating dozers is the heaviest task with 25 questions. Between 50 and 60% of the questions test knowledge and recall, 35 to 45% procedural and application, and under 10% critical thinking. The Red Seal self-assessment guide gives the pass mark as 70%.
ExamHub's free 636C practice quiz has 210 original questions weighted to the real exam blocks and tasks, with an explanation and a source for every answer. Safety questions use Ontario's Construction Projects regulation (O. Reg. 213/91) and the Ontario underground locate rules, and a few are labelled as BC rules for comparison.
What's covered
Categories follow the 8 Red Seal exam tasks, weighted like the real exam.
Try a few
Five sample questions from the question bank, with the answer and explanation.
Why: The table to s. 188(2) sets 3 m for 750 to 150,000 volts, 4.5 m for more than 150,000 up to 250,000 volts, and 6 m above 250,000 volts. A 230,000 volt line falls in the middle band.
Why: Pre-oilers are listed in the required knowledge for scheduled maintenance. A pre-oiler supplies oil to the engine's moving parts before the engine turns over, which reduces wear at start-up, especially in cold conditions.
Why: The sequence is to stop the equipment, lower the implement and attachment, lock out the hydraulics, transmission and brakes, and perform the engine shut-down. After that the established ERP is initiated according to the situation.
Why: Each wall runs back 3 m horizontally for the 3 m depth at 1:1, so the top width is 2 m + 3 m + 3 m = 8 m. Using only one wall gives 5 m, 6 m leaves out the bottom width, and 20 m uses a 3:1 slope that Type 3 soil does not need.
Why: Existing ground is higher than the design elevation by 101.25 - 100.80 = 0.45 m, so material must be removed. A fill would be needed only if the existing ground were below the design elevation, and 0.35 m is an arithmetic slip.
FAQ
The Red Seal Heavy Equipment Operator (Dozer) exam has 100 multiple-choice questions. ExamHub's bank has 210 questions, and Test Mode draws a 100-question timed simulation.
The Red Seal self-assessment guide for this trade gives the pass mark as 70%. The Red Seal exam page does not state a time limit, and ExamHub's Test Mode allows up to 4 hours.
3 blocks: common occupational skills (24 questions), dozer inspection and basic maintenance (26), and dozer operator tasks (50). The tasks with the most questions are operating dozers (25), performing basic dozer functions (20), scheduled maintenance (13) and inspections (13).
No. Heavy Equipment Operator (Dozer) (636C) is a non-compulsory trade in Ontario. Skilled Trades Ontario issues the Certificate of Qualification when the exam is passed, and the trade is part of the Red Seal program.
No. These are original practice questions written from the Red Seal standard and free public sources. They are not copies of exam questions.