100+ Free Red Seal Gasfitter Class B Practice Questions
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Key Facts: Red Seal Gasfitter Class B Exam
100
Practice Questions
OpenExamPrep
100
Exam Questions
Red Seal
70%
Passing Score
Red Seal
120 kW
Max Appliance Input (400,000 BTU/hr)
Red Seal Occupational Standard
CSA B149.1
Installation Code
CSA Group
~$100-170
Exam Fee (CAD, varies)
Provincial apprenticeship authorities
The Red Seal Gasfitter — Class B is the interprovincial (IP) certification for gasfitters who install and service natural gas and propane appliances and piping up to 400,000 BTU/hr (120 kW). The exam has 100 four-option multiple-choice questions, takes about four hours, and requires 70% to pass; it is administered by provincial apprenticeship authorities, with fees typically ranging from about $100 to $170 CAD. Content is grounded in the CSA B149.1 Natural Gas and Propane Installation Code and CSA B149.2, and spans codes and safety, gas properties and combustion, piping and venting, appliances such as furnaces/boilers/water heaters/fireplaces, controls and electrical, and commissioning and service. This free prep includes 100 research-based practice questions with explanations and an AI tutor.
Sample Red Seal Gasfitter Class B Practice Questions
Try these sample questions to test your Red Seal Gasfitter Class B exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1Which code is the primary installation standard a Class B gasfitter applies when installing natural gas and propane appliances and piping in Canada?
2A Class B gasfitter is authorized to install and service gas appliances up to what maximum input rating?
3Which code governs the storage and handling of propane, separate from the installation code?
4Before working on a gas appliance, a gasfitter must verify that the equipment carries which of the following to confirm it is approved for use in Canada?
5What is the characteristic odorant added to natural gas and propane to aid in leak detection?
6The specific gravity of natural gas relative to air is approximately:
7Approximately how much heat is released by burning one cubic foot of natural gas at standard conditions?
8The three requirements that must all be present for combustion to occur are commonly described as the fire triangle. They are:
9Complete combustion of natural gas produces primarily which two harmless products?
10A yellow, lazy, luminous flame on an atmospheric burner most likely indicates:
About the Red Seal Gasfitter Class B Exam
The Red Seal Gasfitter Class B certification qualifies tradespeople to install, service, and maintain natural gas and propane appliances and piping up to 400,000 BTU/hr (120 kW). The interprovincial (IP) exam has 100 multiple-choice questions and requires 70% to pass, with content built on the CSA B149.1 Natural Gas and Propane Installation Code.
Assessment
100 four-option multiple-choice questions over about four hours, 70% to pass; the Gasfitter Class B Red Seal interprovincial exam is administered by provincial apprenticeship authorities. This practice bank is 100 selected-response items.
Time Limit
Approximately 4 hours
Passing Score
70%
Exam Fee
~$100-170 CAD provincial exam fee (varies by province/territory) (Employment and Social Development Canada / Red Seal Program (delivered by provincial apprenticeship authorities))
Red Seal Gasfitter Class B Exam Content Outline
Safety, Codes & Regulations
CSA B149.1/B149.2, provincial gas safety regulations, WHMIS, lockout/tagout, confined space, gas-leak response, permits, red tags, and the AHJ
Gas Properties & Combustion
Specific gravity, heating value, odorant, flammability limits, combustion triangle, complete vs incomplete combustion, carbon monoxide, and primary/excess air
Piping & Venting
Pipe materials and sizing, pressures, drip legs, shut-off valves, CSST bonding, leak testing, vent categories, clearances, combustion air, and common venting
Appliances ≤120 kW
Furnaces, boilers, water heaters, fireplaces and unit heaters up to 400,000 BTU/hr, heat exchangers, orifices, FVIR, condensate, and efficiency
Controls & Electrical
Thermocouples, thermopiles, flame rectification, gas valves and regulators, 24 V controls, limit/rollout/pressure switches, ignition, and bonding
Commissioning & Service
Purging, leak verification, clocking the meter, combustion analysis, manifold pressure, diagnosing spillage and short-cycling, and homeowner education
How to Pass the Red Seal Gasfitter Class B Exam
What You Need to Know
- Passing score: 70%
- Assessment: 100 four-option multiple-choice questions over about four hours, 70% to pass; the Gasfitter Class B Red Seal interprovincial exam is administered by provincial apprenticeship authorities. This practice bank is 100 selected-response items.
- Time limit: Approximately 4 hours
- Exam fee: ~$100-170 CAD provincial exam fee (varies by province/territory)
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
Red Seal Gasfitter Class B Study Tips from Top Performers
Frequently Asked Questions
How many questions are on the Red Seal Gasfitter Class B exam and how long is it?
The Gasfitter Class B Red Seal interprovincial exam has 100 four-option multiple-choice questions and takes about four hours. You need 70% to pass, and the content is based on the CSA B149.1 Natural Gas and Propane Installation Code.
What score do I need to pass the Gasfitter Class B exam?
You need 70% to pass the Red Seal Gasfitter Class B exam. Because it spans codes, gas properties, piping and venting, appliances, controls, and commissioning, balanced study across every area is important.
What is the difference between Gasfitter Class A and Class B?
A Class B gasfitter works on gas appliances up to 400,000 BTU/hr (120 kW), covering most residential and light-commercial equipment. A Class A gasfitter has an unlimited input scope for larger commercial and industrial equipment.
Which code does the Gasfitter Class B exam test?
The exam is built on the CSA B149.1 Natural Gas and Propane Installation Code, along with CSA B149.2 for propane storage and handling and your provincial gas safety regulation. Many questions require applying code rules to a scenario.
How much does the Gasfitter Class B exam cost?
Exam and certification fees are set by each province or territory and typically range from about $100 to $170 CAD. Check with your provincial apprenticeship authority for the exact fee and scheduling details.
Is this free Gasfitter Class B practice as good as paid prep?
Our 100 practice questions cover the same content areas as the Red Seal Occupational Standard, with a teaching explanation for every answer plus free daily AI tutor interactions. All content is free forever and updated for 2026.