Which statement best describes a function test in fire alarm system testing?

• A. Function test verifies each device's operation
• B. Acceptance test verifies the entire system complies with code and performance criteria
• C. A test to ensure alarms are audible
• D. A test to evaluate building occupancy codes

Answer: (A)

The main idea is to verify that each device in the fire alarm system operates correctly when activated. A function test checks the actual operation of individual components—smoke detectors, manual pull stations, initiating devices, the fire alarm control panel, and the sounding or visual notification appliances—by triggering them or simulating conditions to confirm the system responds as designed. It’s about making sure every part in the signal chain works when it’s supposed to, not about proving the entire system meets codes or assessing only whether alarms are audible. An acceptance test, by contrast, looks at the whole system’s compliance with code and performance criteria after installation. Verifying audibility is a part of performance checks, but a function test covers the broader sequence of operation rather than just whether the alarm sounds. Testing building occupancy codes isn’t part of fire alarm device operation.