Gasfitter - Class B - Exam Information
Table of Contents
Self-Assessment
This tool can be used to reflect on your own experience and knowledge in the trade compared with what is on the exam.
Exam Breakdown
Each Red Seal exam's questions are developed to assess the activities laid out in the National Occupational Analysis. This trade's Red Seal exam has 100 questions Footnote *, which are distributed as follows:
Block A – Common Occupational Skills - 7 questions
Block B – Gas Piping Preparation and Assembly - 13 questions
Block C – Venting and Air Supply Systems - 13 questions
Block D – Controls and Electrical Systems - 18 questions
Block E – Installation of Systems and Equipment - 19 questions
Block F – Testing and Commissioning of Gas-Fired Systems - 14 questions
Block G – Servicing Gas-Fired Systems - 16 questions
Types of Exam Questions
All Red Seal exam questions are written in multiple-choice format. A multiple-choice question consists of question followed by four possible responses (A, B, C, D). Every question has exactly one correct answer and three incorrect options. They are not misleading or trick questions, but the incorrect options are not always obvious.
There are three types of questions that you will see on Red Seal Exams:
- Knowledge and Recall
- Procedural and Application
- Critical Thinking
Knowledge and Recall
This type of question tests your ability to recall and understand definitions, facts and principles.
For this trade, between 20 and 30% of questions that are this type.
Example of a Knowledge and Recall Question:
Which sizing table is used to determine the capacities of a CSST system?
- Schedule 40 steel pipe tables.
- Copper tubing tables for natural gas.
- Copper tubing tables for propane gas.
- Manufacturer’s sizing tables.
Answer: D
Procedural and Application
This type of question tests your ability to apply your knowledge of procedures to a situation.
For this trade, between 50 and 60% of questions are this type.
Example of a Procedural and Application Question:
How is the manual valve on a propane cylinder opened?
- Throttled to control flow of gas.
- Fully open when in use.
- Adjusted and set when installed.
- Adjusted according to vapour pressure in tank.
Answer: B
Critical Thinking
This type of question tests your ability to interpret data, solve problems and arrive at valid conclusions.
For this trade, between 15 and 25% of questions are this type.
Example of a Critical Thinking Question:
An air supply system is being laid out for a power draft-assisted burner firing at 1 200 000 Btuh. How many square inches are required?
- 86 in²
- 157 in²
- 171 in²
- 180 in²
Answer: B
Try more sample questions for this trade and check out the Exam Preparation Guide. It will give you practical insights on what goes into Red Seal exams, and how you can best prepare yourself to do well.
Math Formulas
The following formulas used in this trade may be needed to answer some questions on its Red Seal exam. They will also be provided with the exam sitting.
Formulas
- cfm = cubic feet per minute
- T = temperature
- ft3/hr. = cubic foot per hour
- spr = number of seconds per rotation
Acronyms
The following acronyms used in this trade may be on its Red Seal exam. They will also be provided with the exam sitting.
- ABS
- acrylonitrile butadiene styrene
- ACR
- air conditioning and refrigeration
- AFUE
- annual fuel utilization efficiency
- AHJ
- authority having jurisdiction
- ANSI
- American National Standards Institute
- BFS
- battery-filling system
- CAPS
- combustion air proving switch
- CEC
- Canadian Electrical Code
- cfm
- cubic feet/minute
- CSA
- Canadian Standards Association
- CSST
- corrugated stainless steel tube
- DFMAH
- direct-fired make-up air heater
- DWV
- drain, waste, vent
- EAC
- electronic air cleaner
- ECM
- electronically commutated motor
- EF
- electrofusion
- FARC
- fuel air ratio control
- FLA
- full load amps
- FVS
- fuel valve switch
- HGPS
- high gas pressure switch
- HSI
- hot surface ignitor
- HWA
- high water alarm
- I.D.
- inside diameter
- IR
- infrared
- LGPS
- low gas pressure switch
- LP
- liquid propane
- LWA
- low water alarm
- LWCO
- low water cut-off
- NBC
- National Building Code
- NPS
- nominal pipe size
- O.D.
- outside diameter
- OHS
- Occupational Health and Safety
- OHSA
- Occupational Health and Safety Act
- PB
- proportional band
- PID
- proportional integral derivative
- POC
- proof of closure
- ppm
- parts per million
- psia
- pounds per square inch absolute
- psig
- pounds per square inch gauge
- QNFT
- quantitative fit test
- spr
- seconds per revolution
- SSOV
- safety shut-off valve
- USG
- U.S. gallon
- USWG
- U.S. water gallon
- UV
- ultraviolet
- VAC
- Volts/Alternative Current
- VDC
- Volts/Direct Current
- VFD
- variable frequency drive
- VPS
- valve proving system
- w.c.
- water column
- WHMIS
- Workplace Hazardous Materials Information System
For more information about exam preparation materials contact your provincial/territorial apprenticeship office.