Automotive HVAC Final Correct Questions & Answers!

1. Where is the heater core located? - ANSWER In the dash 2. In a system with no PTC heater, how is the coolant heated? - ANSWER the engine heats the coolant 3. How is current controlled in a PTC heater? - ANSWER The PTC is Self regulated resistence, Changes with heat and makes it shut off. 4. What component is responsible for circulating the air inside the cabin? - ANSWER Blower motor 5. What is a benefit of using a PTC heater? - ANSWER It Provides heat without having the car on. 6. Why is it helpful to have a working blower motor resister? - ANSWER It allows you to control the speed of the blower motor 7. What is the job of the blend door actuator? - ANSWER It Controls where the air passes through. in order to change the temp 8. What is used to keep dust, pollen, and other small particles from entering the cabin? - ANSWER Cabin air filter 9. Explain the difference between automatic and manual climate control. - ANSWER Automatic allows you to set the specific temp and does everything automatically. Manual has a dial with hot/cold. 10. What component does the air always flow through? (hint: it dries the air when the A/C is on) - ANSWER Evaporater Core 11. How are the different settings achieved? (feet, vent, defrost,recirculation) - ANSWER The mode button uses actuators to open doors that change the direction of the air. 12. What is the benefit of having the air recirculated in the cabin instead of pulling in outside air? - ANSWER The A/C doesn't have to work as hard and Can Make the air Colder. 1. For every 1 psi a liquid's boiling point is raised ___ degrees. - ANSWER 3 2.True/False A liquid will boil easier in a vacuum(negative pressure). - ANSWER True 3. True/False Refrigerant 1234YF is mildly flammable. - ANSWER True 4. True/False 50/50 mix coolant boils at 200 deg F. - ANSWER False 5. When using the coolant refiller, how can you tell if there is a leak in the cooling system? - ANSWER It will not be able to pull a Vacuum. If it does, it will not hold Vacuum. 6. True/False The coolant refiller is a quick way to refill the cooling system while eliminating air pockets. - ANSWER True