Which is the first step in determining the time for a round trip using the actual testing method for MWS performance?

The first step in determining the time for a round trip using the actual testing method for Mobile Water Supply (MWS) performance involves positioning or parking the MWS apparatus ready to dump. This initial action is crucial because it sets the stage for the entire testing process. Properly positioning the vehicle allows for an accurate assessment of the round trip time, as it ensures that the test begins under consistent and controlled conditions.

Once the apparatus is positioned correctly, the subsequent steps—such as opening the dump valve, recording the time for the round trip, and stopping the clock when everything is back in order—can be executed effectively. This initial setup is fundamental as it influences the overall performance evaluation of the mobile water supply operation. Without ensuring the apparatus is ready to dump, the timing and performance metrics could be skewed, leading to unreliable results.