What can rain do in relation to soil during hoisting operations?

Rain can significantly alter the properties of soil during hoisting operations. When rain falls on soil, it increases the moisture content, which often leads to the soil becoming softer. This is particularly important in construction and hoisting scenarios because softer soil can affect the stability and capability of lifting operations. The presence of excess water in the soil can reduce its cohesion, making it less stable and potentially leading to issues such as slippage or sinking of equipment or structures.

In contrast to the other options, which suggest drying out or hardening the soil or imply no effect, the reality is that moisture typically increases the soil's plasticity and reduces its load-bearing capacity. Understanding these changes is crucial for safety and operational efficiency in hoisting activities.