Hydronic Heating Terms and Definitions

The hydronic term for measuring the flow rate of water through piping and equipment is

• Gallons Per Minute
• Cubic Feet per Minute
• British Thermal Unit
• Feet Per Second

Name the 4 main forms of heat transfer.

• radiation, evaporation, fusion and conduction
• radiation, convection, conduction and evaporation
• conduction, convection, vaporization and evaporation
• radiation, convection, conduction and vaporization

The term used for heat transfer is

• GPM
• FPS
• CFM
• BTU

Temperature differential is commonly referred to as

• TD
• Alpha T
• Delta T
• Beta T

Microbubbles are

• Tiny air bubbles you can barely see in water
• Small air bubbles you can easily see in water
• Large air bubbles in water
• Air bubbles that only exist in hot water

In hydronic heating, what is meant by the term "natural circulation?"

• The movement of water in a stream or river.
• The circulation of water by a pump that runs on solar power.
• The circulation of water by a hand driven pump.
• Gravity circulation of hot water without a pump

What is the main cause of "pressure drop" in a hot water piping system?

• temperature drop
• friction loss
• turbulence
• flow rate

"Static head pressure" refers to

• the press. of water in a system based on height/elevation.
• the press. of water on the discharge side of the pump.
• the press. of water on the suction side of the pump.
• the press. that a pump must overcome based on the friction loss.

"Pump Head" or "Total Dynamic Head" pressure means

• the difference in pressure between the suction and discharge
• the press. needed to overcome the total system press. drop
• the press. needed to overcome the height of the system.
• the highest pressure the pump can handle.

Velocity (speed) of the water circulating through a piping system is measured by

• gallons per minute
• feet per second
• cubic feet per minute
• gallons per hour