TFM 12 Fire Alarm Technical Exam 2025 – 400 Free Practice Questions to Pass the Test

The requirement for a pressure tank supervisory signal initiating device to detect both high and low pressure conditions within a specific range is determined by industry standards and safety protocols in fire protection systems. The correct answer of 10 psi reflects the standard requirement that pressure variations outside of this range could indicate potential issues with the fire suppression system.

Detecting pressures higher or lower than this range ensures that any deviations from the prescribed operating conditions are caught in a timely manner, allowing for appropriate maintenance or corrective actions to be taken before they lead to system failure. The 10 psi range is a balance between sensitivity and practicality, ensuring that routine fluctuations in pressure that do not impact system operation will not trigger false alarms.

In fire protection, maintaining proper pressure within a water supply system is critical for effective operation, as inadequate or excessive pressure can hinder the overall performance of firefighting efforts. Hence, 10 psi serves as a vital threshold for pressure monitoring.