1. A piping system that conveys fresh water, or is open to the atmosphere at any point.

2. What type of radiant heating system uses one heat source to heat both the floor and the domestic water?

3. What type of radiant heating system generally operates at a pressure of approximately 15-to 30 psi?

4. What type of radiant heating system is part of the domestic plumbing system and operates approximately 40 to 70-psi?

5. What is the time between when the concrete slab (radiant panel) is warmed by the boiler water and heat is radiated into the living space?

6. Technicians performing a Spectrographic Analysis use what gas, to inject into the distribution tubing at low pressure?

7. What is the temperature range between setpoints in which no mechanical heating or cooling occurs?

8. What is the name of additional heat required to warm the water in a hydronic system?

9. Which device measures the temperature of a liquid at some point in a system, and opens or closes electrical contacts based on that temperature and its setpoint temperature?

10. Thermostat used to control modulating valves.