Sample Questions
Practice Questions with Explanations
Get a feel for the exam format with these sample questions covering key trade competencies, rigging calculations, and safety standards:
Sample Question 1
Under O. Reg. 213/91, s. 36, what must be done about reinforcing steel that protrudes from concrete and may endanger a worker?
- It must be removed, cut off at the surface or otherwise protected as soon as practicable
- It may be left exposed if workers are warned about it at the morning toolbox talk
- It must be protected only when it projects more than 1.5 metres above the surface
- It must be painted a high-visibility colour and left in place until the next pour
Explanation: O. Reg. 213/91, s. 36 covers a formwork tie, reinforcing steel, a nail or another object protruding from concrete or another surface that may endanger a worker. The protrusion must be removed, cut off at the surface or otherwise protected as soon as practicable. A cap or trough is one way to protect the bar; the section sets no minimum projection height and does not prescribe a cap design.
Sample Question 2
A load of 6000 kg is lifted with a symmetrical 2-leg bridle sling. Each sling leg is 5.0 m long, and the vertical distance from the hook to the pick points is 4.0 m. Using the formula sheet rule, what is the tension in each sling leg?
- 3750 kg
- 3000 kg
- 4500 kg
- 3250 kg
Explanation: Formula sheet: Sling tension = (W ÷ number of slings) × (L ÷ vertical H). Tension = (6000 kg ÷ 2) × (5.0 m ÷ 4.0 m) = 3000 × 1.25 = 3750 kg per leg.
Sample Question 3
Using the Red Seal formula sheet rule (cut length = all lengths + 2 bar diameters per bend), what is the cut length for a 20M bar (nominal diameter 20 mm) with two 90° bends and leg lengths of 500 mm, 800 mm, and 500 mm?
- 1880 mm
- 1800 mm
- 1840 mm
- 1920 mm
Explanation: Formula sheet rule: Cut length = all lengths + 2 bar diameters per bend. Sum of legs = 500 + 800 + 500 = 1800 mm. Bends = 2 bends × (2 × 20 mm) = 80 mm. Cut length = 1800 + 80 = 1880 mm.
Sample Question 4
Under OPSS 905 Table 1, by how much may the cover to the concrete surface be reduced at most?
- By not more than one-third of the specified cover
- By not more than one-half of the specified cover
- By not more than 10 mm
- Not at all; the specified cover is a strict minimum
Explanation: OPSS.PROV 905 Table 1, note 1: the cover to the concrete surface shall not be reduced by more than one-third of the specified cover. The cover and placing tolerances in the table include fabrication tolerances (905.07.01).
Sample Question 5
Calculations on a placing drawing show theoretical elongation for a tendon is 150 mm. The measured elongation is 158 mm. If the allowable tolerance is ±7%, is this elongation acceptable?
- Yes, the elongation is +5.33% above theoretical, which is within the ±7% allowable tolerance
- No, the elongation is +8.0% above theoretical, which exceeds the allowable tolerance limit
- No, measured elongation must never exceed theoretical elongation under any field condition
- Yes, because any measured elongation within twenty-five millimetres of theoretical is accepted
Explanation: Percentage difference = (Measured - Theoretical) / Theoretical × 100% = (158 - 150) / 150 × 100% = +8 / 150 × 100% = +5.33%. Since +5.33% is within ±7%, the elongation is acceptable.
Frequently Asked Questions
Ironworker – Reinforcing (452A) FAQ
How many questions are on the Ironworker – Reinforcing (452A) Red Seal exam?+
The interprovincial Red Seal Ironworker – Reinforcing (452A) exam consists of 120 multiple-choice questions. ExamHub's practice question bank includes 200 questions, and Test Mode delivers a full 120-question timed simulation.
What is the pass mark for the Ironworker – Reinforcing (452A) exam?+
The qualifying pass mark is 70% (84 correct answers out of 120 questions). Candidates are allotted 4 hours (240 minutes) to complete the test.
What topic areas are tested on the Red Seal Ironworker – Reinforcing (452A) exam?+
The exam covers 5 Major Work Activities: Common Occupational Skills (29 Qs), Rigging, Hoisting & Cranes (28 Qs), Rebar Fabrication (15 Qs), Rebar Placing (34 Qs), Pre-stressing & Post-tensioning (14 Qs).
How does ExamHub's practice mode work?+
Practice Mode gives you instant feedback and explanations after every answer with category filtering. Test Mode delivers a realistic timed simulation with a 4-hour countdown and passing grade evaluation.
Does ExamHub's content match the real exam questions?+
No. These are original practice questions created by ExamHub based on the Red Seal Occupational Standard (RSOS), Skilled Trades Ontario curriculum guidelines, and trade safety regulations. They are designed for study practice and are not copies of actual exam questions.