Why does an air source heat pump system's heating capacity ...

[Hungry!]

Why does an air source heat pump system's heating capacity decrease as the outdoor temperature decreases?
 
  A) the compression ratio increases because the evaporator pressure increases
  B) the compression ratio decreases because the evaporator pressure increases
  C) the compression ratio decreases because the evaporator pressure decreases
  D) the compression ratio increases because the evaporator pressure decreases

Question 2

Variable refrigerant flow systems use:
 
  A) Scroll compressors and electronic expansion valves.
  B) Inverter driven systems and thermostatic expansion valves.
  C) Inverter driven systems and electronic expansion valves.
  D) Scroll compressors and thermostatic expansion valves.

[jojobee318]

Answer to Question 1

D

Answer to Question 2

C

[Hungry!]

Thanks for the timely response, appreciate it

[bigcheese9]

TYSM