What principle does a spring probe use to measure water flow?

Answer: B — It bends as water flows, sending information back to a display unit

A spring probe measures water flow by utilizing the principle of mechanical deflection. As water passes through and flows against the spring probe, the force of the flowing water causes the spring to bend or deflect. This bending is directly proportional to the flow rate; thus, the extent of the deflection can be translated into flow information. The data from this movement is then transmitted back to a display unit, which interprets the bending motion and provides a readout of the water flow rate. This method of measurement is particularly effective because it offers a simple yet reliable means to gauge flow without needing complex calculations or electronic sensors. The straightforward mechanism of a mechanical probe allows for durability and upkeep in various conditions of operation.