In a hydraulic elevator with a proportional control valve, which consequence results when rapid valve closure occurs?

💡 Explanation

Rapid valve closure induces fluid hammer, because the fluid's inertia causes a pressure spike as it is suddenly stopped by the valve. Therefore, a pressure surge occurs, rather than smooth deceleration, which requires gradual actuation controlled to prevent sharp pressure changes.

• Which outcome occurs when a lathe's tool post suffers deflection under load?
• Which outcome arises when refrigerant leaks from a refrigeration system using R-410A blend due to microcracks?
• Which risk increases when a hydraulic actuator operates with entrained air, triggering cavitation?
• Which risk increases when an HVAC technician uses an improperly calibrated refrigerant leak detector?
• Which failure is likely if a MOSFET's gate charge insufficient to fully switch?
• Which outcome results when three-phase breakers trip asynchronously in a motor circuit?