Sheet Metal Worker · Red Seal 308A
Five Sheet Metal Red Seal practice test questions, answers included.
One question from each of the exam's five work activities, all procedural: the type the Red Seal Program puts at 60 to 70 percent of this exam. Pick an answer, then open the explanation. Every question in the bank explains all four options, not just the right one.
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40 free 308A questions in all
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A sheet has jammed under the hold-downs of a power squaring shear, and the hold-downs are air-operated. The shear's electrical disconnect is locked and tagged. What else is done before reaching in to clear the jam?
- Lock the air valve shut and bleed the hold-downs.
- Shut the air off at the compressor next door.
- Step on the foot switch to show nothing moves.
- Pry the hold-downs up with a bar to free the sheet.
Show the answer
A. Correct. The hold-down cylinders are a second, pneumatic energy source, and air trapped in them can still drive the hold-downs down. The shear's air supply valve is locked closed and the circuit bled to zero before hands go under the hold-downs.
Source: Red Seal Occupational Standard, sub-task A-1.03
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On a run of 90° flanges in 18 gauge (0.0500 in.) stainless steel, the first flange, bent to 90°, springs back to an 87° bend when the leaf is released. How are the rest of the flanges bent?
- Bent to 87° so it springs back to 90°.
- Bent to 90°, then hammered square on a stake.
- Bent to 90° with the clamping pressure raised.
- Bent to 93° so it springs back to 90°.
Show the answer
D. Correct. Springback is the elastic part of the bend recovering when the load comes off, so the leaf is taken past the angle wanted by the measured springback: 3° here, to 93°. Set the leaf stop there so every flange in the run comes out at 90° and matches.
Source: Red Seal Occupational Standard, sub-task B-6.02
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A supply duct drops through a fire-rated floor. The fire damper delivered for it is labelled for vertical (wall) installation only. What should the installer do?
- Mount it in a level duct section just below the floor.
- Install it in the floor and add a closing spring in the shop.
- Replace it with one listed for horizontal (floor) use.
- Install it in the floor and note the label conflict for the inspector.
Show the answer
C. Correct. A fire damper is tested and listed for the orientation on its label. Laid flat in a floor, a curtain made to fall by its own weight has nothing to pull it shut, so dampers listed for horizontal use are built to close without relying on gravity. The damper must suit the separation it protects, here a floor.
Source: Red Seal Occupational Standard, sub-task C-11.04
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The drawings for a laboratory counter call for Type 304 stainless, No. 4 finish, 16 gauge (0.0625 in.). The sheets delivered to site are stencilled Type 430, No. 4 finish, at the right thickness. What does the installer do?
- Install them, since the finish and thickness match the drawings.
- Set the sheets aside and report the mismatch before cutting.
- Ask the supplier to confirm Type 430 as an equal, then install.
- Passivate them on site so they perform like Type 304.
Show the answer
B. Correct. The type number identifies the alloy, and Type 430 is not the Type 304 the drawings specify. Whether a substitute is acceptable is the designer's decision, not the installer's, so the material is held unused and the mismatch is reported in writing.
Source: Red Seal Occupational Standard, sub-task D-17.01
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An inspection checklist calls for the airflow through a 36 in. × 10 in. return grille rated 68 % free area. A velometer averages 410 fpm across the grille face. What is the airflow, to the nearest whole cfm?
- 474 cfm
- 697 cfm
- 1 025 cfm
- 1 507 cfm
Show the answer
B. Correct. Face area = (36 × 10) ÷ 144 = 360 ÷ 144 = 2.5 sq. ft; × (68 ÷ 100) = 1.7 sq. ft of free area; × 410 fpm = 697 cfm. The figure goes on the checklist beside the design or last recorded value.
Source: Red Seal Occupational Standard, sub-task E-18.01
Want ten more with every option explained? Free Sheet Metal Red Seal practice questions (308A) — no account, no email, printable. With five more on each exam block page below, that makes 40 free 308A questions in all.
The Sheet Metal Red Seal exam at a glance
How many questions are on the 308A Red Seal exam?
The Red Seal Sheet Metal Worker (308A) exam has 120 multiple-choice questions, a 4-hour writing time and a 70% pass mark, which is 84 correct answers. The questions cover five major work activities, and 60 to 70 percent are procedural and application questions. A formula sheet and an acronym list are provided at the sitting. Sources: the Red Seal Program's exam information page and Exam Preparation Guide, checked October 26, 2026.
Question mix — weighted to the blueprint
On the Sheet Metal Worker exam, 60 to 70 percent of the paper is procedural and application: questions that test whether you can apply a procedure to a situation. Knowledge and recall is 20 to 30 percent and critical thinking 5 to 15 percent, and in the Red Seal Program's words, the incorrect options are not always obvious. The standard's procedures run from pattern development, brake work and seams to hanging and sealing duct, fire dampers, venting, flashing, air balancing and repairs. Installing air and material handling systems is the largest block at 41 questions and fabrication has 38, so 79 of the 120 questions sit in those two blocks. Two tasks carry 16 questions each, fabricating duct components and installing air handling components, and pattern development carries 13.
The Red Seal Exam Preparation Guide gives the pass mark as 70 percent, which is 84 correct answers out of 120, and gives four hours of writing time, about 2 minutes a question. The exam information page for this trade lists a formula sheet, with bend allowance, mitre angle, pattern angle, cfm and the fan laws among its entries, and an acronym list of 19 terms, both provided at the sitting; no code book is listed. The current exam is based on the 2018 Red Seal Occupational Standard for Sheet Metal Worker. A 2026 standard has been published, and the Red Seal Program says exams for it are under development. Ontario certifies the trade as Sheet Metal Worker (308A), a compulsory trade, and Skilled Trades Ontario gives the apprenticeship as 9,000 hours, 8,280 on the job and 720 in school across three levels. It is a Red Seal trade in all thirteen provinces and territories, titled Tinsmith in Quebec.
The full Sheet Metal Red Seal practice exam
Find the Sheet Metal blocks that still need work before exam day.
Free, original practice for the Sheet Metal Worker Red Seal exam — 308A in Ontario. Every test is weighted to the official exam blueprint — mostly procedure, with recall and critical thinking in their published shares — so your practice score shows which areas still need work before exam day.
What the Sheet Metal Worker exam covers
Five major work activities.
The occupational standard groups the trade into 5 major work activities, 19 tasks and 77 sub-tasks. The question counts below are the official blueprint weightings — our 550-question bank is built to that same map, with every sub-task covered. Installing air and material handling systems leads with 41 of the 120 questions, then fabrication (38) and common occupational skills (24); roofing and specialty products has 10 and maintenance and repair 7. Every one of the 19 tasks carries exam questions, from 2 to 16 each.
- A
Performs common occupational skills · 24 questions
Safety-related functions — PPE, a safe work environment and lockout (5 questions); tools and equipment — hand, power and layout tools, welding, cutting, soldering and brazing, access equipment and rigging (9); organizing work — drawings, specifications, estimating and planning (7); and communication and mentoring (3). Free block A questions: safety, tools, welding and drawings →
- B
Performs fabrication · 38 questions
Pattern development (13 questions): parallel-line, radial-line and triangulation layout, elbows, transitions and fitting software; fabricating sheet metal components for air and material handling systems (16), the joint largest task on the exam: cutting, forming, lining, seams and joints, dampers and accessories; flashing, roofing, sheeting and cladding (3); and specialty products (6). Free block B questions: pattern layout and fabrication →
- C
Installs air and material handling systems · 41 questions
Preparing the installation site (7 questions); chimneys, breeching and venting (6); air handling system components (16): equipment, duct, dampers, fire dampers and air outlets; material handling system components (5); thermal insulation, lagging, cladding and flashing (3); and leak testing, air balancing and commissioning (4). The largest block on the paper. Free block C questions: duct installation and air balancing →
- D
Installs roofing and specialty products · 10 questions
Metal roofing and cladding or siding systems (3 questions); exterior components (2); and specialty products (5), such as stainless steel, architectural and coated products. Free block D questions: metal roofing and cladding →
- E
Performs maintenance and repair · 7 questions
Scheduled maintenance (3 questions): inspecting systems and components; and repairing faulty systems and components (4). Free block E questions: maintenance and repair →
Where our numbers come from
Every question, anchored to the standard.
Sheet metal questions can quietly go wrong in three ways: one shop's habit presented as the only right answer, a gauge or a clearance remembered from somewhere else, and layout arithmetic that skips a step. Every question in our 308A bank is anchored to a sub-task of the occupational standard and verified against it, with all four options explained. Where an answer depends on a specification, a manufacturer's instructions or a listing, the question states it, and it tests the method. The exam provides a formula sheet, so the layout and airflow questions use the same formulas and show their working in the explanations: bend allowance, mitre angles and elbow cut sizes, stretch-outs, true lengths, cfm and free area, fan laws. The question counts above are the Red Seal Program's own exam breakdown for Sheet Metal Worker, and every question is mapped to a sub-task of the Red Seal Occupational Standard. The current exam and this bank follow the 2018 standard. For what each block covers and where to spend your study time, read the Sheet Metal Red Seal exam guide. Read how our questions are made.
Edited by Trevor Mulder · Last checked against the Red Seal Program's published exam information.
Why recall alone falls short
Knowing the terms is not the same as knowing the next step.
Only 20 to 30 percent of the Sheet Metal Worker exam asks you to recall a fact. Between 60 and 70 percent is procedural: knowing what to do next with the pattern, the fitting or the system in front of you. Knowing what springback is does not tell you what angle to set the leaf to. Knowing what a fire damper does does not tell you whether a damper labelled for walls can go in a floor. Knowing the bend allowance formula does not tell you which angle goes into it. The formula sheet gives the formulas; setting them up is yours to bring. TicketPrep weights every test to the published blueprint, so your practice score shows which areas still need work before exam day.
How TicketPrep prepares you
Built like a study tool, not a quiz app.
Weighted to the blueprint
Every test matches the published Sheet Metal Worker weightings — recall, procedure and critical thinking in the proportions the published exam breakdown sets.
Every answer explained
Learn why the right answer is right — and why each of the other three is wrong. That's where the learning happens.
Timed mock exams
Full-length tests that match the 120-question count and the four hours the Red Seal preparation guide gives, so exam day feels familiar.
Know your weak areas
Your score broken out by work activity, so you always know which block to drill next.
Sheet Metal Worker exam questions
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How many questions are on the Sheet Metal Red Seal exam?
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