Author Question: Glycol solutions are added to water in secondary refrigerant loops A) To lubricate the ... (Read 59 times)

2125004343 · **on:** Jul 26, 2018

Glycol solutions are added to water in secondary refrigerant loops

A) To lubricate the circulating pump bearings B) To increase the system heat transfer
C) To make leaks easier to locate D) To prevent freezing and inhibit corrosion

Question 2

When the thermostat calls for second stage heat on a dual fuel air source heat pump

A) Both the heat pump and the furnace operate at the same time
B) The furnace remains on and the heat pump is energized for additional heat
C) The heat pump shuts down and the furnace comes on
D) The furnace shuts off and the heat pump is energized in heating