A residential A/C system that cools in summer and heats in winter ...

[mspears3]

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.

[bfulkerson77]

Answer to Question 1

D

Answer to Question 2

C

[mspears3]

Gracias!

[diana chang]

Thanks for the timely response, appreciate it