Question

the ______ diagram is used to help the installation electrician to wire the unit properly.
o a. technician
o b. pictorial
o c. factual
o d. installation

Explanation:

A pictorial diagram uses images or symbols to represent components and their connections, which is very helpful for an electrician to wire a unit properly. A technician diagram is not a standard term in this context. A factual diagram is too vague. An installation diagram is a more general term and not as specific as a pictorial diagram for showing the wiring details with visual elements.

Answer:

B. pictorial