Gas Trade Unit 20: Boilers and Hydronic Systems

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 20 with free CSA B149.1-25 compliant practice questions for the TSSA G2 certification exam. This unit covers boilers, hydronic heating systems, circulators, zone controls, and pool heating systems.

📖 What This Unit Covers

Gas Trade Unit 20 focuses on boiler and hydronic heating fundamentals:

  • Chapter 1: Boilers - Boiler types and operation principles
  • Chapter 2: Distribution and Control Systems - Hydronic distribution design
  • Chapter 3: Circulators - Circulator sizing and selection
  • Chapter 4: Hydronic Control System Servicing - Zone controls and troubleshooting
  • Chapter 5: Pool Heating Systems - Pool heater requirements

🎯 TSSA G2 Exam Relevance

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

Exam Coverage: Boiler and hydronic system topics appear in approximately 18-22% of G2 exam questions.

💡 Study Tips for Unit 20

  • Understand boiler types and their operation principles
  • Master hydronic distribution system design and components
  • Learn circulator sizing and selection procedures
  • Study zone control systems and their applications
  • Review expansion tank sizing and pool heater requirements

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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.