When slowing or stopping cab-controlled cane bridge or trolley with reverse power (when the crane controls are designed for this purpose), the movement is called:

When slowing or stopping cab-controlled cane bridge or trolley with reverse power (when the crane controls are designed for this purpose), the movement is called:

• A. Inching
• B. Idling
• C. Plugging
• D. Skewing

Answer: (C)

Plugging is the technique of using reverse power to slow and stop the crane’s bridge or trolley. When the cab controls are set up for this, applying reverse power makes the motors act as generators, producing braking torque that opposes the motion. This rapid, controlled stop is the hallmark of plugging, often used for precise stopping and positioning. Inching, by contrast, is slow, deliberate movement using normal forward power to position a load with fine control, without reversing the drive. Idling means the system is powered but not moving, or the drive is disengaged. Skewing refers to a misalignment of the bridge or trolley, not a stopping method.

Plugging is the technique of using reverse power to slow and stop the crane’s bridge or trolley. When the cab controls are set up for this, applying reverse power makes the motors act as generators, producing braking torque that opposes the motion. This rapid, controlled stop is the hallmark of plugging, often used for precise stopping and positioning.

Inching, by contrast, is slow, deliberate movement using normal forward power to position a load with fine control, without reversing the drive. Idling means the system is powered but not moving, or the drive is disengaged. Skewing refers to a misalignment of the bridge or trolley, not a stopping method.