Which of the following is not an example of a confined space?

A confined space is typically defined as an area that is large enough for an employee to enter and perform work but has limited means of entry or exit and is not designed for continuous occupancy. Examples of confined spaces often include locations like silos, pits, and tanks, all of which have restricted access and can pose hazards due to factors like poor ventilation or the potential presence of hazardous materials.

In contrast, an open field does not fit this definition. It is an expansive area without restrictions on movement or access, allowing for easy entry and exit. This fundamentally differentiates open fields from confined spaces, making it clear why it is the correct answer to this question. The absence of confinement and potential hazards typically associated with sectors like silos, pits, and tanks highlights the unique characteristics of a confined space and establishes open fields as not qualifying under this definition.