If the engine speed check indicates the MWS apparatus is running at a different speed than rated, what should be done?

When an engine speed check indicates that the Mobile Water Supply (MWS) apparatus is running at a different speed than its rated specification, the most appropriate action is to stop testing until the problem is resolved. This is crucial because operating the apparatus at an incorrect engine speed can result in inadequate performance, potential damage to the equipment, or a failure to meet safety standards.

Continuing the testing under these circumstances could lead to inaccurate results, which might compromise the operational readiness of the vehicle. It's essential for safety and reliability that any discrepancies in engine performance are addressed before proceeding with further testing or operation. Ensuring that the equipment is functioning correctly is vital for safe and effective firefighting operations, which is why halting testing until the issue is corrected is the most responsible choice.