Gas Trade Unit 3: Properties of Natural Gas & Propane

TSSA G3 Certification - Practice Questions & Chapter Reviews

📋 Certification Level: TSSA G3 (Gas Technician 3 - Basic)

Master Gas Trade Unit 3 with free CSA B149.1-25 compliant practice questions for the TSSA G3 certification exam. This unit covers the physical and chemical properties of natural gas and propane, fuel characteristics, combustion principles, and safe fuel handling procedures.

📖 What This Unit Covers

Gas Trade Unit 3 focuses on understanding gas fuel properties and safe handling:

  • Chapter 1: Properties of Natural Gas - Composition, characteristics, and behavior of natural gas
  • Chapter 2: Properties of Propane - LPG characteristics, vapor pressure, and storage requirements
  • Chapter 3: Combustion Principles - Combustion process, air requirements, and products of combustion
  • Chapter 4: Safe Fuel Handling - Storage, transportation, and safety procedures for gas fuels

🎯 TSSA G3 Exam Relevance

CSA Code Reference: CSA B149.1-25 (General fuel properties and safety), CSA B149.2 (Propane Storage and Handling)

Exam Coverage: Fuel properties and combustion principles appear in approximately 10-15% of G3 exam questions, essential for understanding safe gas system operation and troubleshooting.

💡 Study Tips for Unit 3

  • Understand the differences between natural gas and propane properties
  • Memorize key characteristics: specific gravity, BTU content, ignition temperature
  • Learn combustion stoichiometry and air-to-fuel ratios
  • Know safety procedures for detecting gas leaks and fuel odorization requirements
  • Study propane storage requirements and pressure-temperature relationships

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📖 Related Gas Trade Resources Units

← Previous Unit

Unit 2: Tools, Fasteners & Testing Equipment

Review essential tools and testing equipment for gas installations

Next Unit →

Unit 4/4a: Codes & Ontario Regulations

Learn about CSA B149.1-25 code structure and Ontario regulations

🔗 Related

Unit 1: Safety

Review safety protocols for handling natural gas and propane

🚀 Next Steps in Your TSSA G3 Preparation

📚 Complete All G3 Units

Work through all 9 Gas Trade units to ensure comprehensive G3 exam readiness.

View All G3 Units →

📖 Study CSA B149.1-25 Code

Access the official CSA B149.1-25 code and deepen your understanding of gas installation standards.

Search CSA Codes →

🤖 Try AI-Powered Study Tools

Get instant answers to your gas technician questions with our AI tutor trained on CSA codes.

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📚 Additional G3 Study Resources

⚠️ Educational Resource Disclaimer: This practice test is an independent educational resource designed to help students prepare for the TSSA G3 certification exam. These materials are based on CSA B149.1-25 requirements but are not official TSSA materials. 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.