Final answer:
TPR valves are safety devices in water heating systems to prevent explosions by releasing water during unsafe temperature or pressure levels. They are not meant to function continuously and doing so indicates a potential system issue.
The corret opction is:true
Step-by-step explanation:
The statement is true; TPR valves, which stand for Temperature and Pressure Relief valves, are indeed emergency devices.
These valves are a critical safety component in water heating systems, designed to prevent the possibility of an explosion due to overpressure or overheating by releasing water when either the temperature or pressure exceeds safe levels.
TPR valves are not intended to open under normal operating conditions and should only function when the system's pressure or temperature reaches unsafe thresholds.
Continuous discharging can indicate a malfunction or that the system is operating under an unsafe condition that needs to be addressed.