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HVAC Study Guide Questions and Answers | Latest Version | 2025/2026 | Correct & Verified Which device controls airflow direction in a duct system? A) Diffuser B) Damper C) Blower motor D) Heat exchanger What is the main purpose of a heat exchanger? A) Store refrigerant B) Transfer heat without mixing fluids C) Control airflow D) Measure temperature Which HVAC system provides both heating and cooling using electricity? A) Gas furnace B) Heat pump C) Boiler D) Radiator ...

HVAC Study Guide Exam Questions and Answers What is the main difference between the two-position and timed two-position control? a) The timed two-position maximizes the difference between the operation and control differential b) The timed two-position control makes use of a proportional plus integral control c) The timed two-position minimizes the difference between the operating and control differential d) The timed two-position control does not use an on-off control e) The timed t...

HVAC Study Guide Questions and Answers Graded A+ Why is IAQ important? a) to provide a comfortable environment for occupants b) to provide enough oxygen for occupants c) to provide the right temperature for a productive environment for occupants d) to provide sufficient airflow for occupants e) to provide a healthy environment for occupants e) to provide a healthy environment for occupants What is not considered a contaminate? a) Carbon Dioxide b) Ozone c) Carbon Monoxide d)...