What is the first step in the stationary operation of a PTO driven fire pump?

Answer: D — Position the MWS apparatus

In the stationary operation of a PTO (Power Take Off) driven fire pump, the first step is to position the Mobile Water Supply (MWS) apparatus. This step is crucial because it ensures that the apparatus is properly located at the scene where water is needed, and it is stable and ready for operations. Positioning the apparatus correctly allows firefighters to access equipment and supplies safely and efficiently, facilitating a smooth transition into pump operations. After positioning the apparatus, other steps, such as setting the parking brake, chocking the wheels, and then operating the PTO control, contribute to safety and effective pumping, but they follow after ensuring the proper location of the vehicle. Proper positioning is foundational as it affects the entire operation sequence, ensuring that safety and accessibility are prioritized before engaging any mechanical controls.