Which mechanism is used to synchronize hydraulic cylinders in a system?

• A. Non-compensated flow control valve
• B. Mechanical yoke
• C. Pilot-operated relief valve
• D. Spool valve

Answer: (B)

Synchronizing hydraulic cylinders means making their motion occur together, with the same stroke and timing. A mechanical yoke does this by tying the two piston rods to a single rigid member. This rigid linkage forces the cylinders to move as one unit, so when one extends or retracts, the other follows in lockstep, keeping their motions matched even if loads vary.

Non-compensated flow control valves adjust how much fluid goes to a cylinder but don’t couple two cylinders, so they can still move at different speeds under uneven loads. A pilot-operated relief valve focuses on limiting system pressure, not coordinating movement. A spool valve directs flow paths, controlling which way fluid goes, but by itself it doesn’t ensure simultaneous motion of multiple cylinders without an external linkage.