Suppression system controls must be provided with what to prevent inadvertent tripping during fire alarm testing?

• A. A physical switch
• B. An interlock device
• C. A testing mode
• D. A remote reset button

Answer: (A)

When testing a suppression system, you need a clear, hard-control that can completely disable the release mechanism to avoid accidental discharge. A physical switch provides a direct, user-initiated way to isolate the system—it's a hardware control located at the system that can be locked out and only operated by authorized personnel. This guarantees that during testing the actuators won’t trip due to signals or software states, making the process safer and more predictable.

Interlock devices can coordinate operations with other systems but aren’t a guaranteed, standalone method to disable the suppression during testing. A testing mode might exist, but it can be easy to misinterpret or misconfigure, while a dedicated physical switch offers a simple, unequivocal stop. A remote reset button is intended for clearing a fault after discharge, not for preventing inadvertent actuation during testing.