Which troubleshooting technique is a set of rectangles used to identify the parts of a system?

• A. Block Diagrams
• B. Flow Charts
• C. Schematic Diagrams
• D. Pictorial Diagrams

Answer: (A)

In troubleshooting and system analysis, what’s being described is a block diagram. This approach uses rectangular blocks to represent the major parts or subsystems of a system and connects them with lines to show how signals, data, or power flow between them. The rectangles keep the view high-level and organized, making it easy to see how parts relate, where a failure could propagate, and where to test to locate a fault. It’s all about the functional relationships and how the pieces interact, not the exact physical layout or the detailed steps inside each part.

Why this fits best: you want a clear map of the system’s components and their connections, and block diagrams do exactly that with simple rectangular symbols and interconnections. By contrast, flow charts focus on steps and decisions in a process, schematic diagrams dive into detailed electrical wiring and component symbols, and pictorial diagrams show a visual, real-world appearance of components.