In the event of a power failure, the ability to raise and lower the pendant cable is achieved by?

In the event of a power failure, the ability to raise and lower the pendant cable is achieved by?

• A. Electric motor
• B. Manual hand pump
• C. Pneumatic actuator
• D. Manual winch

Answer: (B)

When a power outage hits, you rely on a mechanical-hydraulic backup to move heavy controls smoothly and safely. The pendant cable is typically part of a system that uses hydraulic pressure to raise and lower the assembly. A manual hand pump lets you generate that hydraulic pressure by hand, so you can lift or lower the pendant without any electrical power or external air supply. This makes it the reliable backup method because it directly drives the hydraulic actuator already in the mechanism, giving controlled movement and the ability to hold position when you stop pumping. Electric motors won’t work without power, so they aren’t suitable in a blackout. A pneumatic actuator would need a compressed air supply, which may not be available during an outage unless a standby system exists. A manual winch could physically raise or lower something, but it isn’t the standard backup for a hydraulic-controlled pendant and often offers less precise control and slower operation.

When a power outage hits, you rely on a mechanical-hydraulic backup to move heavy controls smoothly and safely. The pendant cable is typically part of a system that uses hydraulic pressure to raise and lower the assembly. A manual hand pump lets you generate that hydraulic pressure by hand, so you can lift or lower the pendant without any electrical power or external air supply. This makes it the reliable backup method because it directly drives the hydraulic actuator already in the mechanism, giving controlled movement and the ability to hold position when you stop pumping.

Electric motors won’t work without power, so they aren’t suitable in a blackout. A pneumatic actuator would need a compressed air supply, which may not be available during an outage unless a standby system exists. A manual winch could physically raise or lower something, but it isn’t the standard backup for a hydraulic-controlled pendant and often offers less precise control and slower operation.