Based on the Red Seal Construction Craft Worker exam blueprint: site work, scaffolding, concrete, masonry, utilities and roadwork
Practice on the go and jump straight back to where you left off.
About the certification
In Ontario, Construction Craft Worker is trade code 450A, a non-compulsory trade administered by Skilled Trades Ontario. Across Canada it is the Red Seal trade Construction Craft Worker, so passing the Certificate of Qualification exam also earns the interprovincial Red Seal endorsement.
The Red Seal exam has 100 multiple-choice questions in 7 blocks: common occupational skills (23 questions), site work (19), scaffolding and access equipment (9), concrete work (18), masonry work (10), utilities and pipeline (11) and roadwork (10). Between 50 and 60% of the questions test knowledge and recall, 40 to 50% procedural and application, and under 5% critical thinking. The Red Seal self-assessment guide gives the pass mark as 70%.
ExamHub's free 450A practice quiz has 200 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), the Ontario locate rules and the Ontario Traffic Manual Book 7, and a few are labelled as rules from other provinces or as standard practice elsewhere.
What's covered
Categories follow the 7 Red Seal exam blocks, weighted like the real exam.
Try a few
Five sample questions from the question bank, with the answer and explanation.
Why: Section 22(1) requires every worker to wear protective headwear at all times when on a project, not just near overhead work or posted areas.
Why: Where a trench is deeper than 6 m or wider than 3.6 m, the support system must be an engineered system designed for that location. The standard timber table only goes to 6.0 m, and a stock box is not enough.
Why: Under s. 126(1)(b), a scaffold must resist four times the maximum load without overturning. Two times applies to allowable stresses in the materials (s. 126(1)(a)), and three times only to components whose capacity can only be found by testing.
Why: Sprinkling water or cement on the surface to ease finishing causes dusting or scaling, and extra water in the mix weakens the concrete. Fogging or evaporation retarders protect the surface until final finishing.
Why: Section 235(2) requires an engineered support system designed for the specific project when a trench is deeper than 6 m or wider than 3.6 m. The timber table stops at 6.0 m, and a standard box or hydraulic system is not enough at this depth.
FAQ
The Red Seal Construction Craft Worker exam has 100 multiple-choice questions. ExamHub's bank has 200 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.
7 blocks: common occupational skills (23 questions), site work (19), scaffolding and access equipment (9), concrete work (18), masonry work (10), utilities and pipeline (11) and roadwork (10).
No. Construction Craft Worker (450A) 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.