Hydronic Heating, Heat Transfer and Comfort

The sun shines down on this family as the play on the beach. Which type of heat transfer are they feeling?

• conduction
• convection
• radiation
• evaporation

While walking on the warm sand with your bare feet you experience heat through.

• conduction
• convection
• radiation
• evaporation

Blow drying your wet hair uses __________ type of heat.

• conduction
• convection
• radiation
• evaporation

The warm air from this heat emitter creates a ____________current as the warm air rises and the cold air sinks.

• conduction
• convection
• radiation
• evaporation

Heat transfers from an area of ____temperature to an area of ___ temperature.
(2nd law of thermodynamics)

• high to low
• low to high
• high to high
• low to low

The 3 main components of a hydronic heating system are: the heat source, the heat transfer units and the

• pump
• expansion device
• distribution system
• controls

Which answer is NOT a heat source?

• heat exchanger
• the sun
• boiler
• radiator

Which answer is NOT a heat transfer unit?

• radiator
• unit heater
• diffuser
• hot water coil

A hot water heating distribution system consists of all of the piping, including the valves, fittings and the circulator.

• true
• false

In hydronic heating, the term comfort basically means that people feel comfortable when

• they feel relatively warm as in a sunny room
• they feel fairly cool as in a nicely air conditioned room 
• they feel neither warm or cool while wearing light clothing
• they feel neither warm or cool while wearing heavy winter clothing