The hydraulic quantity readout is valid only when the system is pressurized.

• A. True
• B. False
• C. Sometimes
• D. Not specified

Answer: (A)

In a hydraulic system, the quantity readout is tied to the pressure signal in the lines. The sensor or transducer that converts fluid amount into a display relies on hydraulic pressure to produce a meaningful measurement. When the system isn’t pressurized, there’s no active pressure reference to drive the readout, so the indication cannot reliably reflect how much fluid is actually in the system. That’s why the hydraulic quantity readout is considered valid only when the system is pressurized.