Wiring and componentsQuestion 406 of 1506

Which diagram describes the sequence of circuit operations using functional descriptions without device symbols?

  1. Wiring diagram
  2. Schematic diagram
  3. Block diagram
  4. Pictorial diagram
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Correct answer: Block diagram

A block diagram does not show device symbols or wire connections.

Source: Electrical Fundamentals Competency (Industry Training Authority of BC), 6.2: Types of Electrical Diagrams

Practice wiring and components

Questions last reviewed: 18 October 2026