Which statement about automatic start initiation is true?

Which statement about automatic start initiation is true?

• A. It is never used in NFPA 20
• B. It is only based on time
• C. It can be triggered by a drop in system pressure
• D. It relies solely on manual input

Answer: (C)

Automatic start initiation is about starting the fire pump automatically in response to system demand. The common and reliable trigger is a drop in system pressure: when water is being drawn off the system, pressure falls to a set point, a pressure switch detects that drop, and a start signal is sent to energize the pump. This ensures the pump comes on without human action and restores sufficient discharge pressure. It’s not limited to manual action, nor is it only time-based; while timing elements may exist in sequencing, the initiation itself hinges on pressure sensing or other automatic signals from the system or fire equipment.

Automatic start initiation is about starting the fire pump automatically in response to system demand. The common and reliable trigger is a drop in system pressure: when water is being drawn off the system, pressure falls to a set point, a pressure switch detects that drop, and a start signal is sent to energize the pump. This ensures the pump comes on without human action and restores sufficient discharge pressure. It’s not limited to manual action, nor is it only time-based; while timing elements may exist in sequencing, the initiation itself hinges on pressure sensing or other automatic signals from the system or fire equipment.