Governor inspection includes inspecting which component?

• A. Sheave bearings
• B. Hoist ropes
• C. Hydraulic fluid reservoir
• D. Piston rods of roped water hydraulics

Answer: (D)

The key idea is that the governor’s safety and speed-control function in a roped water hydraulic drive relies on the hydraulic actuator path it governs. In roped water hydraulics, the piston rods convert hydraulic movement into the drive’s motion, and the governor’s ability to sense speed and trip properly depends on the condition of that linkage. If the piston rods show wear, bending, scoring, corrosion, or loose mounting, the governor may not actuate correctly or could misread speed, which directly affects safe operation. Therefore, during governor inspection, paying close attention to the piston rods of the roped water hydraulics ensures the governor can perform its control and safeties reliably. The other items—sheave bearings, hoist ropes, and the hydraulic fluid reservoir—are important for overall operation, but they are not the components most directly tied to the governor’s function.