🔍 Key Concepts

• Identify the illustrated device (pump vs. motor) and how it converts hydraulic flow and pressure into mechanical output. • Relationship between flow rate and shaft speed in a hydraulic motor. • Relationship between pressure, torque, and horsepower in hydraulic systems: (HP = \frac{Torque \times RPM}{5252}).

💭 Think About

• Look at the angle housing, pistons, and driveshaft: is this component designed to send oil out, or to be driven by oil coming in? • If the pump feeding this device increases flow while holding pressure approximately constant, what happens to shaft RPM, torque, and therefore horsepower? • Consider which of the answer choices matches a situation where flow is the main variable but system pressure does not change very much.

✅ Before You Answer

• Be clear whether flow controls speed and pressure controls torque in a hydraulic motor. • Check which option suggests that all three (HP, torque, speed) move together vs. only one changing significantly. • Verify that your chosen option is consistent with the power formula: if torque stays about the same and RPM changes, what must happen to horsepower?