Which of these is an example of a confined space?

A confined space is defined as a space that is not designed for continuous occupancy, has limited means of entry and exit, and can pose potential hazards, such as insufficient oxygen, toxic atmospheres, or the presence of engulfment hazards.

Pump rooms fit these criteria. They are typically enclosed spaces that house equipment like pumps and machinery. Access to these areas is often restricted, and the environment within them can be hazardous due to the machinery, potential chemical spills, or other safety risks.

On the other hand, deck areas, crew quarters, and open cargo areas do not meet the definition of confined spaces. Deck areas are generally open and accessible, crew quarters are designed for occupancy and have adequate egress routes, and open cargo areas lack the confinement that characterizes a confined space. Therefore, pump rooms are the best example of a confined space within this context.