437A Metal Fabricator Practice Quiz
Free · 195 Questions.

Based on the Red Seal Metal Fabricator (Fitter) exam blueprint: layout, cutting, forming, fitting, welding and finishing

📝 130 Q practice test✅ Pass: 70%⏱ Up to 4 hr🔁 Free retakes Updated: October 2026
⚠️ExamHub is an independent study resource and is not affiliated with, endorsed by, or reviewed by Skilled Trades Ontario or the Red Seal program. Questions are original practice materials.
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130 questions with a 240-minute timer. 70% (91/130) to pass, with complete answer review at the end.
⏱ 240 min130 Qs70% to passAnswer review
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Or practice by topic
Safety-Related Functions
9 questions
Tools and Equipment
9 questions
Organizing Work
9 questions
Quality Assurance
10 questions
Handling Materials
9 questions
Communication and Mentoring
5 questions
Layout
36 questions
Cutting Materials
26 questions
Forming Materials
22 questions
Fitting and Fastening
28 questions
Welding Activities
20 questions
Completing the Project
12 questions
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About the certification

Metal Fabricator (Fitter) (437A) Certificate of Qualification

In Ontario, Metal Fabricator (Fitter) is trade code 437A, a non-compulsory trade administered by Skilled Trades Ontario. Across Canada it is the Red Seal trade Metal Fabricator (Fitter), so passing the Certificate of Qualification exam also earns the interprovincial Red Seal endorsement.

The Red Seal exam has 130 multiple-choice questions in 3 blocks: common occupational skills (34 questions), fabricates components (56) and assembles components (40). Performing layout is the heaviest task with 24 questions. Between 35 and 45% of the questions test knowledge and recall, 50 to 60% procedural and application, and under 10% critical thinking. The Red Seal self-assessment guide gives the pass mark as 70%.

ExamHub's free 437A practice quiz has 195 original questions weighted to the real exam blocks and tasks, with an explanation and a source for every answer. Safety questions use Ontario's Industrial Establishments regulation (O. Reg. 851) and free CCOHS guidance, and trade questions follow the Red Seal Occupational Standard.

What's covered

195 practice questions, by category

Categories follow the 12 Red Seal exam tasks, weighted like the real exam.

Topic breakdown

  • Safety-Related Functions9
  • Tools and Equipment9
  • Organizing Work9
  • Quality Assurance10
  • Handling Materials9
  • Communication and Mentoring5

 

  • Layout36
  • Cutting Materials26
  • Forming Materials22
  • Fitting and Fastening28
  • Welding Activities20
  • Completing the Project12

Try a few

Sample 437A Metal Fabricator practice questions

Five sample questions from the question bank, with the answer and explanation.

Question 1
At a pedestal grinder, how far may the work rest be from the grinding wheel according to O. Reg. 851?
  • No more than 3 mm, set above the wheel's centre line
  • No more than 6 mm, set at the wheel's centre line
  • No more than 10 mm, set below the wheel's centre line
  • No more than 1 mm, set below the wheel's centre line

Why: A work rest must have a maximum clearance of three millimetres from the wheel, be positioned above the centre line of the wheel, and must not be adjusted while the wheel is in motion. A wide gap lets the work jam between the rest and the wheel.

Question 2
A 1,000 kg load is lifted with a two-leg sling and each leg makes an angle of 30 degrees with the horizontal. What is the tension in each leg?
  • 1,000 kg
  • 500 kg
  • 866 kg
  • 2,000 kg

Why: Each leg carries half the load divided by the sine of the angle to the horizontal: 500 / sin 30 degrees = 1,000 kg. The smaller the sling angle, the higher the tension, which is why CCOHS says a smaller angle reduces what the sling can carry.

Question 3
A cylinder is to be rolled from 10 mm plate to an inside diameter of 500 mm. Taking the neutral axis at mid-thickness, what is the required plate length?
  • 1,602 mm
  • 1,571 mm
  • 1,634 mm
  • 1,500 mm

Why: The neutral axis diameter is the inside diameter plus one plate thickness: 500 + 10 = 510 mm. The developed length is pi x 510 = 1,602 mm. Using the inside diameter (1,571 mm) would make the shell too small.

Question 4
Why can standard oxy-fuel cutting be used on mild steel but not on stainless steel?
  • Mild steel burns readily in oxygen; stainless forms a resistant chromium oxide
  • Mild steel melts at a lower temperature than the oxy-fuel flame can ever reach
  • Stainless steel conducts heat so fast that it cannot be preheated by a flame
  • Stainless steel does not react with oxygen at any temperature a flame reaches

Why: Oxy-fuel cutting works by burning the steel in a stream of oxygen. Stainless steel forms a high-melting chromium oxide skin that stops the process, so plasma or another method is used instead.

Question 5
A welded frame is going to be hot-dip galvanized. Where should vent and drain holes in hollow or enclosed parts be placed?
  • Vent holes at the highest point and drain holes at the lowest point
  • A single hole at the lowest point serves as both vent and drain
  • Holes placed on the side that faces the lifting lugs
  • No holes are needed if the hollow part is welded closed

Why: The Galvanizers Association guidance is that items enter and leave the baths at an angle, so vents sit at the highest point and drains at the lowest point as mounted for galvanizing. This allows air and liquid to escape during immersion and withdrawal.

FAQ

437A Metal Fabricator questions, answered

How many questions are on the 437A Red Seal exam?

The Red Seal Metal Fabricator (Fitter) exam has 130 multiple-choice questions. ExamHub's bank has 195 questions, and Test Mode draws a 130-question timed simulation.

What is the pass mark for the 437A exam?

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.

What topics are on the Metal Fabricator (Fitter) exam?

3 blocks: common occupational skills (34 questions), fabricates components (56) and assembles components (40). The tasks with the most questions are performing layout (24), fitting and fastening sub-components and components (19) and cutting materials (17).

Is the 437A trade compulsory in Ontario?

No. Metal Fabricator (Fitter) (437A) 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.

Are these the real exam questions?

No. These are original practice questions written from the Red Seal standard and free public sources. They are not copies of exam questions.

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