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UNIT 66 REVIEW QUESTIONS ANSWER KEY GO BACK TO INDEX
66-1) What is the difference between a water source heat pump and an air source heat
pump?
66-2) What type of metering device do most packaged water source heat pumps use?
66-3) Why do the refrigerant and water travel in opposite directions through the water
coil? The water and refrigerant always travel in opposite directions. This counter-
66-4) Why don’t water source systems have a defrost cycle?
66-5) Explain the difference between an open loop and a closed loop?
66-6) What is a geothermal heat pump system?
66-7) What site conditions should be taken into account when considering the installation
of a ground source heat pump?
66-8) What is a water to water heat pump?
66-9) What are some of the advantages for radiant floor heating?
66-10) Why are the insulated water tanks for heat pump systems referred to as “buffer”
tanks?
66-11) Where is the compressor located in most water source heat pumps?
66-12) Why do geothermal heat pump systems work better in cold climates than air
source systems?
66-13) How can heat be considered a form of pollution?
66-14) How is heat transferred in a heat pump ground loop?
66-15) What type of system requires a secondary refrigerant?
66-16) What happens if water freezes on the outside of a closed loop pond heat pump
system?
66-17) What is the difference between the way a secondary refrigerant absorbs heat and
the way a primary, direct expansion refrigerant absorbs heat?
66-18) Why would a water source heat pump be more efficient than an air-to-air heat
pump?
66-19) What is the problem with sizing a geothermal heat pump to the full heat loss of a
home in a cold climate?
66-20) What is the advantage of a dual capacity compressor in a water source heat pump?
66-21) How can water source heat pumps help reduce domestic hot water cost?
66-22) Which type of system requires more pumping horsepower for the water: open
loop or closed loop?
66-23) What is most often used as a secondary refrigerant in geothermal systems?
