HVAC Module 1 Verified Answers

HVAC Module 1 Verified Answers 1. What is the primary medium used for heat transfer in a hydronic heating system? - Answer: Water. 2. What method is utilized to control the growth of bacteria in HVAC systems? - Answer: Ultraviolet light. 3. Besides its role in the mechanical refrigeration cycle, what additional function does the evaporator serve? - Answer: It transfers heat from the indoor air to the refrigerant. 4. In which type of systems is a defrost cycle necessary? - Answer: Refrigeration systems. 5. What can be produced when certain refrigerants are exposed to a flame? - Answer: Phosgene gas. 6. What is mastic used for in HVAC applications? - Answer: To seal ductwork. 7. What type of company specializes in the installation and repair of air conditioning systems? - Answer: A mechanical contractor. 8. Who is typically responsible for issuing building permits? - Answer: Local government. 9. What does keeping your employer's interests in mind reflect? - Answer: Loyalty. 10. What is the minimum number of classroom hours required annually for an apprentice program? - Answer: 144 hours. 11. Equipment manufacturers are most likely to employ individuals who provide what type of support? - Answer: Engineering assistance. 12. In a typical household forced-air furnace, from where is heat transferred to the heat exchangers? - Answer: Air. 13. What role does water play in heating systems? - Answer: It often serves as the heat exchange medium.