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
What is the primary safety purpose of installing plastic caps or wooden troughs over protruding vertical rebar?
- Preventing impalement injury from falling
- Shielding rebar surfaces against corrosion
- Securing the exact spacing of column cages
- Guiding concrete during discharge hoppers
Explanation: Reinforcing steel protruding from a surface that may endanger a worker must be removed, cut off at the surface or otherwise protected (O. Reg. 213/91 s. 36). Caps or troughs guard the impalement hazard (29 CFR 1926.701(b)).
Sample Question 2
Using the formula T = (W / # slings) x (L / vert. L), what is the tension in each leg of a 2-leg bridle sling lifting 12,000 lb., where sling length is 10 ft. and vertical height is 8 ft.?
- 7500 lb.
- 6000 lb.
- 9375 lb.
- 4800 lb.
Explanation: T = (12,000 / 2) x (10 / 8) = 6000 x 1.25 = 7500 lb per leg. The distractor 4800 lb inverts the length ratio (6000 x 8/10).
Sample Question 3
Which hook turns are used at the ends of stirrups and column ties?
- Turns of 90 or 135 degrees
- Semicircular hooks, as on main bars
- Turns of 45 or 60 degrees
- Turns of 180 or 270 degrees
Explanation: CRSI terminology, 'Hook': a hook is a semicircular (180 degree) or 90 degree turn at the free end of a bar to provide anchorage in concrete; for stirrups and column ties only, turns of either 90 degrees or 135 degrees are used. The tail length is set by the drawings and the design code.
Sample Question 4
Using the formula Force = Area x Pressure, what force is exerted by a stressing jack with an effective ram area of 10 sq. in. at 5000 psi?
- 50,000 lb.
- 5,000 lb.
- 25,000 lb.
- 500 lb.
Explanation: Force = A x P = 10 sq. in. x 5000 psi = 50,000 lb.
Sample Question 5
How is the 'snug-tight' condition defined for high-strength structural bolts under the RCSC specification?
- Plies brought into firm contact using an ordinary spud wrench
- Nut rotated exactly one-half turn beyond initial hand-tightness
- Torqued with calibrated pneumatic impact wrench until socket stops
- Tightened until bolt threads strip and yield elastically by 5%
Explanation: RCSC 2020 defines the snug-tight condition as plies in firm contact with each bolting assembly at least as tight as a few impacts of an impact wrench, resistance to a suitable non-impacting wrench, or the full effort of an ironworker using an ordinary spud wrench.
Frequently Asked Questions
Ironworker – Generalist (420B) FAQ
How many questions are on the Ironworker – Generalist (420B) Red Seal exam?+
The interprovincial Red Seal Ironworker – Generalist (420B) 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 – Generalist (420B) 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 – Generalist (420B) exam?+
The exam covers 6 Major Work Activities: Common Occupational Skills (14 Qs), Rigging, Hoisting & Cranes (32 Qs), Reinforcing Steel (21 Qs), Pre-stressing & Post-tensioning (10 Qs), Erection, Assembly & Installation (31 Qs), Maintenance & Upgrading (12 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.