Quiz 7: check your understanding

1. During a site survey, which tool gives a quick indication of dissolved salts (TDS)?

2. Discharge air recirculating back to the coil inlet will:

3. A unit gives 60 dB(A) at 1 m. Ignoring reflections, roughly what is the level at 4 m?

4. Anti-vibration mounts isolate well only when the forcing frequency divided by the natural frequency is:

5. A 20 kW heat pump runs at ΔT 5 K. The water flow is about:

6. Where should the Y-strainer go in a heat pump water circuit?

7. Which gas must flow through copper pipe during brazing?

8. After isolating the vacuum pump, the micron gauge keeps rising steadily without levelling. This means:

9. Why must the phase sequence be checked on a three-phase scroll compressor unit?

10. Outdoor elastomeric foam insulation without UV protection will typically:

Course 7 — Installation Practice