Quiz 2: check your understanding

1. A heat pump delivers 12 kW of heat and draws 3 kW. What is its COP?

2. Where does the refrigerant absorb heat?

3. What happens to the refrigerant in the expansion device?

4. Which compressor type is most common in mid-size units of about 5–100 kW?

5. "Inverter" in a heat pump means:

6. Suction line is 9 °C and saturation temperature at suction pressure is 3 °C. Superheat is:

7. The most likely cause of a high-pressure switch trip in water heating is:

8. On a P-h diagram, the expansion process is:

9. Which change raises COP the most?

10. During reverse-cycle defrost:

Course 2 — How a Heat Pump Works