Like many multisplit units, variable refrigerant flow (VRF) ...

[roselinechinyere27m]

Like many multisplit units, variable refrigerant flow (VRF) systems use ________ compressors and electronic expansion valves to change the volume of refrigerant being circulated in the system.
 
  A) reciprocating B) scroll C) inverter driven D) screw

Question 2

The National Electric Code, NEC, is enforced:
 
  A) Anywhere the OSHA has jurisdiction because it is an OSHA regulation.
  B) All across the nation because it is a federal law.
  C) In the District of Columbia because it is a federal regulation.
  D) In states and municipalities that have adopted the NEC.

[juwms]

Answer to Question 1

C

Answer to Question 2

D

[roselinechinyere27m]

TYSM

[essyface1]

Gracias!