What is one example of functional testing?

Functional testing refers to testing that ensures equipment operates as intended in its specific functional role. Exercising shut-off valves is a prime example of functional testing because it involves physically operating the valves to verify that they open and close properly, ensuring that they will perform reliably in emergency situations or during normal operations.

This testing is vital for safety and operational integrity in various systems, especially in power engineering, where the failure of a shut-off valve could lead to hazardous conditions or process interruptions. By regularly exercising these valves, operators confirm that they are free from obstructions, properly maintain the correct sealing, and are ready for immediate use when required.

Other options, like replacing turbine blades, performing oil analysis, or overhauling a pump, while important maintenance tasks, do not specifically test the functionality of the components in their operational roles. They focus more on preventative maintenance or performance assessment rather than verifying that a particular system or component works correctly in real-time operational conditions.