Author Question: Like many multisplit units, variable refrigerant flow (VRF) systems use ________ compressors and ... (Read 52 times)

roselinechinyere27m · **on:** Jul 24, 2018

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.