California ICC UST Inspector Practice Exam

Which of the following is NOT classified as a confined space?

1. A really deep turbine sump

2. A space not designed for continuous employee occupancy

3. An area with limited access

4. An area with limited ventilation

The correct answer is: An area with limited ventilation

In this context, an area with limited ventilation may present hazards but does not inherently classify it as a confined space. Confined space classifications are based on the nature of the space being enclosed and the conditions under which it is used. A confined space is defined as one that: 1. Is large enough for a person to enter and perform work. 2. Is not designed for continuous occupancy. 3. Has limited means for entry or exit. 4. May contain or has the potential to contain hazardous atmospheres. While limited ventilation can lead to poor air quality and increase the risk of hazardous conditions, it does not meet the fundamental criteria that define a confined space, such as restricted entry and exit points, or being unsuitable for continuous occupancy. On the other hand, a deep turbine sump would qualify as a confined space due to its depth and potential hazards. Spaces not designed for continuous occupancy are also classified as confined spaces because they fit the criteria even if they might not immediately seem hazardous. An area with limited access typically qualifies as a confined space if it meets the other criteria, such as size and purpose of use. Thus, the classification focuses on structural characteristics and intended use, rather than just air quality or ventilation conditions.