Which acronym expands to Building Automation System?

• A. Building Control System
• B. Building Automation System
• C. Building Automation system
• D. Building Management System

Answer: (C)

The main idea here is understanding what BAS stands for in building control terminology. BAS is the Building Automation System—the integrated set of controls, sensors, actuators, networks, and software that automatically manages and coordinates building systems such as HVAC, lighting, and other subsystems. The three words map directly to the acronym: Building (the asset), Automation (the use of control strategies and technology to manage it), System (the collection of components that work together as one). This is why the expansion Building Automation System is the standard and most precise way to describe BAS in commissioning and facilities practice. Note that the capitalized form is typical for a defined system name, so you’ll usually see it written as Building Automation System. Other phrases like Building Management System describe a related concept in some regions, but BAS specifically refers to automation and control of building services.