Author Question: A residential A/C system that cools in summer and heats in winter by reversing the flow of ... (Read 92 times)

mspears3 · **on:** Jul 24, 2018

A residential A/C system that cools in summer and heats in winter by reversing the flow of refrigerant is called a:

A) PTAC system. B) Stand-alone A/C system.
C) Window unit. D) Heat pump.

Question 2

To prevent the spread of smoke and fire, fire dampers are designed to close:

A) Manually.
B) Using the NO contacts of the fire alarm relay.
C) Automatically.
D) All the time except when the system is operating.