Cranes Load Characteristics

Cranes and hoists are used for lifting and moving heavy objects. Their operation typically involves:

• Starting under load (lifting a heavy object from rest).
• Frequent starting and stopping.
• Changing direction (lifting up and lowering down).

Load Type Explanation

Based on their operation, the load offered by cranes and hoists is best described as:

• Reversing: Because they can lift (move upwards) and lower (move downwards), their direction of operation reverses.
• Heavy start: They often need to start lifting when the load is substantial, requiring high initial torque.

Therefore, the load type is a reversing, heavy start load.

Why Other Options Are Incorrect

• Gradually varying load: This implies a slow, steady change, not the sudden application of torque needed to lift heavy items.
• Non-reversing, no-load start: Cranes frequently reverse direction and almost always start while carrying a load.
• Reversing, light start: While cranes do reverse, they frequently start under heavy loads, not just light ones.