What can cause spray pressure to be too high?

The correct answer is that a restricted bypass system can indeed lead to excessively high spray pressure. In a properly functioning spray system, the bypass system is designed to return excess fluid back to the tank or to manage flow through the system. If this system becomes restricted, it limits the return flow of the liquid. As a result, the pump continues to generate pressure without the appropriate outlet to vent the excess fluid, leading to an accumulation of pressure in the lines and ultimately causing the spray pressure to increase above desired levels.

In terms of context, a pump malfunction would typically affect the overall performance and pressure levels in a different way, possibly causing low pressure or inconsistent spraying. Worn nozzles can lead to uneven distribution or reduced flow rather than an increase in pressure. Clogged lines can cause pressure readings to vary based on the specific location within the system where pressure is being measured, but they usually result in lower pressure at the nozzles rather than an increase. Understanding the mechanics of the bypass system is crucial for maintaining optimum performance and preventing pressure-related issues in spraying equipment.