Gas Trade Unit 19: Forced-air Furnaces

TSSA G2 Certification - Practice Questions & Chapter Reviews

📋 Certification Level: TSSA G2 (Gas Technician 2 - Intermediate)
⚠️ Prerequisites: G3 Certification + 2 Years (4,000 hours) Experience

Master Gas Trade Unit 19 with free CSA B149.1-25 compliant practice questions for the TSSA G2 certification exam. This heavily tested unit covers forced-air furnaces, heat exchanger inspection, blower systems, and electrical troubleshooting procedures.

📖 What This Unit Covers

Gas Trade Unit 19 focuses on forced-air furnace systems:

  • Chapter 1: Forced-air Furnaces - Furnace types and operation
  • Chapter 2: Servicing of Mechanical Components - Heat exchanger inspection, blower service
  • Chapter 3: Electrical Circuits and Components - Control sequences and electrical troubleshooting

🎯 TSSA G2 Exam Relevance

CSA Code Reference: CSA B149.1-25 Section 9 (Forced Air Heating Appliances)

Exam Coverage: Forced-air furnace topics appear in approximately 20-25% of G2 exam questions (heavily tested).

💡 Study Tips for Unit 19

  • Master furnace types: conventional, condensing, and mid-efficiency models
  • Learn heat exchanger inspection techniques and failure modes
  • Understand blower motor troubleshooting and airflow requirements
  • Study furnace control sequences and electrical circuits
  • Review airflow calculations and duct system requirements

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Unit 18: Water Heaters (G2)

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Unit 20: Boilers and Hydronic Systems (G2)

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📖 Study CSA B149.1-25 Code

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📚 Additional G2 Study Resources

⚠️ Educational Resource Disclaimer: This practice test is an independent educational resource designed to help students prepare for the TSSA G2 certification exam. These materials are based on CSA B149.1-25 requirements but are not official TSSA materials. G2 certification requires G3 prerequisite plus 2 years (4,000 hours) documented experience. Always refer to the official CSA B149.1-25 code and current TSSA guidelines for authoritative information. LARK Labs is not affiliated with TSSA or CSA Group.