Which of the listed pressure control valves would be used to permit the completion of one action of a hydraulic system before a second action would be permitted?

Correct Answer: Option B — Sequence valve

Sequence valves operate by sensing pressure in a primary circuit; once that pressure reaches a specific threshold, the valve opens to allow fluid to flow to a secondary actuator. This ensures a logical, sequential operation, such as clamping a workpiece before a drilling operation begins.