When using the actual testing method, when should the clock be stopped?

The clock should be stopped when the dump valve is back in the proper position. This is crucial because it indicates that the water has been successfully discharged, and the operation can now be considered complete. Stopping the clock at this point ensures that the time taken to perform the entire function, from dumping the water to securing the equipment, is accurately measured.

This timing is essential for evaluating the efficiency and efficacy of the mobile water supply operations. It allows for a consistent benchmark to be established for training and future assessments. Stopping the timer at the moment the dump valve is reset ensures that operators are being evaluated on their ability to complete the water discharge process thoroughly, which includes both releasing the water and returning the equipment to a safe operational state.