Which of the following earth moving machines has the shortest cycle time?

Explanation:

The cycle time of an earth-moving machine refers to the time required to complete one full operation cycle: digging → loading → swinging → dumping → returning.

Dragline:

• Used for excavating below machine level (e.g., deep pits, underwater).

• Has a longer cycle time due to the swinging arc and cable operation.

• Not ideal for quick repetitive operations.

Dipper Shovel (Front Shovel):

• Used for excavating above machine level (e.g., benches in quarries).

• Has short and fast cycle time due to direct digging, short swing, and dumping cycle.

• Suitable for bulk excavation and fast loading operations.

 Additional InformationClamshell:

• Mainly used for vertical lifting like loading loose material or excavation from depths.

• Slow due to opening/closing of the bucket and vertical movement.

• Has one of the longest cycle times among lifting/excavation tools.

Hoe (Backhoe):

• Suitable for excavating below ground level.

• Moderate cycle time, as it has to move the arm, rotate, and dump material.

• Used where precision is more important than speed.