What procedures should be completed on the Ship's Service Turbine Generator (SSTG) strainer?

• A. Shift, inspect, and clean.
• B. Inspect and replace elements
• C. Lubricate and prime
• D. Clean only

Answer: (A)

The key idea is keeping the seawater cooling path clear and ready by using a three-step routine on the SSTG strainer: shift, inspect, and clean. Shifting moves the element that’s in service to the clean side and brings a fresh element into service, so you’re not running with a partially clogged or worn element. That way you maintain proper flow and prevent debris from entering the turbine cooling system.

Inspecting after shifting is crucial because it lets you look for any damage, wear, cracks, or gasket issues and to verify that the element seats correctly and there are no leaks. Cleaning then removes the accumulated debris, restoring full flow capacity and preventing future blockages.

Cleaning alone isn’t sufficient because debris could be hiding on a damaged or worn element, and that could risk flow or cause damage if not identified. Replacing elements isn’t part of the routine unless the inspection shows damage or excessive wear. So shifting, inspecting, and cleaning together ensure the strainer remains effective and the SSTG cooling system stays protected.