A condition caused by rough operation whereby the crane girders are not perpendicular to the runway resulting in one end being ahead of the other is called:

A condition caused by rough operation whereby the crane girders are not perpendicular to the runway resulting in one end being ahead of the other is called:

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

Answer: (D)

The situation described is a misalignment where the crane girders aren’t square to the runway, causing the bridge to travel at an angle and one end to be ahead of the other. This condition is called skewing. When skewed, the crane doesn’t move straight; the hook and trolley can ride diagonally along the rails, leading to uneven wear on wheels and rails, increased side loading, and a higher risk of derailment or load instability. It typically happens from rough operation, wheel wear, or uneven track conditions, and the remedy is to realign the bridge so it is perpendicular to the runway, inspect and replace worn wheels or guides, and operate more smoothly to avoid jerky movements. Inching is simply slow, precise positioning; idling means no movement; plugging is braking the motion using the motor or braking system—none of these describe the misalignment scenario.

The situation described is a misalignment where the crane girders aren’t square to the runway, causing the bridge to travel at an angle and one end to be ahead of the other. This condition is called skewing. When skewed, the crane doesn’t move straight; the hook and trolley can ride diagonally along the rails, leading to uneven wear on wheels and rails, increased side loading, and a higher risk of derailment or load instability. It typically happens from rough operation, wheel wear, or uneven track conditions, and the remedy is to realign the bridge so it is perpendicular to the runway, inspect and replace worn wheels or guides, and operate more smoothly to avoid jerky movements. Inching is simply slow, precise positioning; idling means no movement; plugging is braking the motion using the motor or braking system—none of these describe the misalignment scenario.