Most communicating systems are wired with 4 wires. They are A) ...

[strangeaffliction]

Most communicating systems are wired with 4 wires. They are
 
  A) two wires for 24 volt power and two for communication
  B) one for power, one for cooling, one for heating, and one for fan
  C) Power lines 1, 2, 3, and 4
  D) Communication lines 1, 2, 3, and 4

Question 2

All welding equipment should be manufactured to standards set by:
 
  A) OSHA B) NEMA C) ANSI D) AWS

[AaaA]

Answer to Question 1

A

Answer to Question 2

C

[strangeaffliction]

TYSM

[sultana.d]

Thanks for the timely response, appreciate it