Quiz 8: check your understanding

1. Before the first start of a compressor with a crankcase heater, the heater should typically be energised for:

2. In the start-up sequence, the compressor is allowed to start only after:

3. A heat pump runs with 2400 LPH flow and a 5 K water temperature rise. Its capacity is about:

4. The same unit uses 4.0 kW of electrical power. Its COP is:

5. Where should the ambient temperature sensor be placed?

6. Suction saturation temperature is 4 °C and suction line temperature is 10 °C. Superheat is:

7. Low subcooling with high superheat most often indicates:

8. Why is a ±0.2 °C sensor error important in capacity testing?

9. On a factory test report, the most important thing to check alongside capacity is:

10. A very small controller differential (for example 1 K) usually causes:

Course 8 — Commissioning and Performance Testing