Which procedures are utilized to verify that each boiler control component is functioning properly prior to boiler flex testing?

The correct answer is online verification procedures. This method involves checking the boiler control components while the system is operational to ensure that they are functioning properly in real-time conditions. By directly observing the behavior of the components during normal operational states, technicians can identify any issues that might not be evident during a static inspection.

In the context of boiler flex testing, it is essential that all control components are verified under conditions that mimic actual operational environments. Online verification helps to ensure that the controls respond appropriately to commands and that safety mechanisms are effectively engaged, which is critical for maintaining the integrity and safety of the boiler system during its operation.

Other procedures, while important in different contexts, do not provide the same level of assurance regarding real-time functionality. Offline inspection procedures typically involve checking components without any operational load, which might miss issues that can only be seen when the system is active. Routine maintenance procedures focus more on regular upkeep rather than specific verification, and emergency shutdown procedures are reactive measures taken during a fault rather than proactive verification processes.