What is the static pressure given in the scenario?

To determine the correct static pressure in this scenario, one must understand the context of static pressure within fire hydraulics. Static pressure is the pressure in the system when water is not flowing; it reflects the potential energy available to move water through the system.

In many fire service scenarios, static pressure is measured in pounds per square inch (PSI) and is typically influenced by the elevation of the water source, the system's configuration, and the existing conditions at the hydrant or within the piping.

Given that 80 PSI is selected as the correct answer, this indicates a scenario consistent with typical static pressure readings one might expect from a municipal water supply system in an urban setting. This value can be considered adequate for fire suppression operations, as it would provide sufficient water flow when needed.

Examining the other options, values such as 70 PSI may be just below the commonly accepted range for effective firefighting but are still within a reasonable margin for static pressure in some areas. The choice of 500 PSI and 1000 PSI seems excessive and unrealistic for static pressure in typical fire hydrant systems. Such high pressures would likely indicate unusual conditions or misinterpretations of the system, as regular municipal systems do not maintain static pressures at such elevated levels.

Understanding