Which of the following is a key reason for routine testing of safety valves?

Routine testing of safety valves is crucial primarily to ensure system safety. Safety valves are critical components in preventing excessive pressure in boilers and pressure vessels. If a safety valve fails to function properly, it can lead to dangerous situations, including explosions or equipment failure. Testing these valves regularly ensures that they can open at the correct pressure levels and perform their primary function of protecting the system from overpressure, which is essential for the safe operation of any boiler system.

Optimizing fuel efficiency, maintaining aesthetic appearance, and reducing maintenance costs, while important in their own right, do not directly relate to the essential safety function of the safety valves. Ensuring that these valves are operational and reliable is paramount for safeguarding both personnel and equipment.