A cab is a control unit that hangs down from the hoists of smaller industrial cranes.

The statement regarding whether a cab is a control unit that hangs down from the hoists of smaller industrial cranes is false. Cabs, in the context of cranes, typically refer to a control room or operator's area that might be located on larger cranes, like tower cranes or overhead cranes, where the operator can monitor and control the crane's movements from a protected environment.

In smaller industrial cranes, operation is often conducted via remote controls or other systems that do not necessitate a hanging cab. This distinction is essential because it highlights the differences in design and control mechanisms based on crane size and intended use, illustrating that a cab is not a standard feature of smaller cranes. Therefore, the understanding that a cab is characteristic of specific types and sizes of cranes contributes to a better grasp of crane design and operation practices.