An arrow superimposed on a hydraulic graphic symbol at approximately 45°, as shown in the illustrated figures A, B, and C, indicates the component __________. GS-0068

Correct Answer: Option D — can be adjusted or varied

In hydraulic schematic symbols, an arrow drawn at a 45-degree angle across a component signifies that the device is adjustable or variable. This is commonly applied to pumps, valves, or motors to indicate that their output, pressure setting, or displacement can be modified during system operation.