Identify the valve type that can be closed rapidly and is hydraulically actuated.

• A. Ball valve
• B. Globe valve
• C. Gate valve
• D. Hydraulically operated check valve

Answer: (D)

Rapid shut-off in a hydraulic system is achieved by a valve that can respond quickly to a hydraulic signal and seat firmly to stop flow. A hydraulically operated check valve uses hydraulic pressure to move the valve into the closed position, providing fast, positive closure when backflow is detected or when isolation is required. This combination—one-way flow control plus an actuator powered by hydraulic fluid—enables immediate shut-off, which is essential in protecting equipment and maintaining system control. Other valve kinds, like ball, globe, or gate valves, are usually actuated manually or with other power sources and typically require more travel or time to achieve full closure, making them less suited for rapid hydraulic shut-off. Hence, the hydraulically operated check valve is the best choice for rapid closure driven by hydraulic actuation.