How is 'deadweight pressure' defined?

Deadweight pressure is defined as the pressure exerted by a fixed weight on a hydraulic piston, which is used for measuring force. This concept is essential in hydraulic systems, where a known weight is applied to a piston, creating a pressure that is directly proportional to the weight and the area of the piston.

When a specific weight is placed on the hydraulic cylinder, it generates a specific amount of pressure based on Paschcal's principle, which states that pressure applied to a confined fluid is transmitted undiminished in all directions. This type of measurement is crucial for ensuring that hydraulic systems operate within safe and effective limits, and it allows for the calibration of hydraulic devices. The deadweight tester is a common instrument that utilizes this principle for accurate pressure calibration and measurement in hydraulic applications.

In contrast, the other options focus on different aspects of hydraulic systems or pressures that do not align with the formal definition of deadweight pressure, making them less applicable or relevant to understanding this specific hydraulic concept.