Gasfitter - Class A - 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 - 6 questions
Block B – Gas Piping Preparation and Assembly - 10 questions
Block C – Venting and Air Supply Systems - 11 questions
Block D – Controls and Electrical Systems - 20 questions
Block E – Installation of Systems and Equipment - 20 questions
Block F – Testing and Commissioning of Gas-Fired Systems - 15 questions
Block G – Servicing Gas-Fired Systems - 18 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 10 and 20% of questions that are this type.
Example of a Knowledge and Recall Question:
What is called the time it takes for a primary or programming control to shut off the fuel supply in the event of a loss of flame signal?
- Flame failure response time.
- Pilot relay shut-down.
- Turndown time.
- Flame lock-out.
Answer: A
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:
The positive air pressure switch on a DFMAH unit is being verified during an inspection. How is the pressure measurement obtained?
- By placing dual port manometer in parallel with pressure switch.
- By placing anemometer in series with pressure switch.
- By placing dual port manometer in series with pressure switch.
- By placing anemometer in parallel with pressure switch.
Answer: A
Critical Thinking
This type of question tests your ability to interpret data, solve problems and arrive at valid conclusions.
For this trade, between 25 and 35% of questions are this type.
Example of a Critical Thinking Question:
What is the minimum ventilation air opening for a boiler room containing a power burner with a firing rate of 1 000 000 Btuh?
- 3.34 in²
- 7.15 in²
- 10.00 in²
- 14.20 in²
Answer: C
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
1 ft3 of water = 6.228 gal.
- E = voltage
- I = current
- R = resistance
- P = power
- V = volt
- A = ampere
- VA = volt − ampere
- I = current
- E = volt
- 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
- AHJ
- authority having jurisdiction
- ACR
- air conditioning and refrigeration
- ANSI
- American National Standards Institute
- BFS
- block flue switch
- BHP
- boiler horsepower
- CAPS
- combustion air proving switch
- CEC
- Canadian Electrical Code
- cfm
- cubic feet/minute
- CPVC
- chlorinated polyvinyl chloride
- CSA
- Canadian Standards Association
- DFMAH
- direct-fired make-up air heater
- DWV
- drain, waste, vent
- FARC
- fuel/air ratio control
- FLA
- full load amps
- HGPS
- high gas pressure switch
- HWA
- high water alarm
- I.D.
- inside diameter
- IR
- infrared
- LGPS
- low gas pressure switch
- L/HGPS
- low/high gas pressure switch
- LP
- liquid propane
- LWCO
- low water cut-off
- NBC
- national building code
- NPS
- nominal pipe size
- O.D.
- outside diameter
- OHS
- Occupational Health and Safety
- OSHA
- Occupational Safety and Health Administration
- PID
- proportional integral derivative
- POC
- proof of closure
- PPE
- personal protective equipment
- ppm
- part per million
- psi
- pounds per square inch
- psia
- pounds per square inch absolute
- psig
- pounds per square inch gauge
- PTFI
- pilot trial for the ignition
- QNFT
- quantitative fit test
- rpm
- rotations per minute
- RTV
- room temperature vulcanizing (silicone)
- scfm
- standard cubic feet/minute
- spr
- seconds per revolution
- SSOV
- safety shut-off valve
- 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.