Question

which of the following is an example of a non-permit required confined space?

walk-in freezer or refrigerator
air plenum (a box that connects to the hvac system)
pipe chase (a narrow space that houses plumbing)
all of the above

Explanation:

Define non-permit required confined space criteria

A non-permit required confined space meets the definition of a confined space (large enough to enter, limited means of entry/exit, not designed for continuous occupancy) but does not contain or have the potential to contain any atmospheric or physical hazards capable of causing death or serious physical harm.

Evaluate the given options

• Walk-in freezer or refrigerator: Large enough to enter, limited entry/exit, not for continuous occupancy, but lacks inherent serious atmospheric or engulfment hazards when properly configured.
• Air plenum: A standard HVAC connection box that meets confined space criteria but typically does not contain serious hazards.
• Pipe chase: A narrow plumbing utility space meeting confined space criteria without inherent serious hazards.

Determine the correct choice

Since all three individual options represent spaces that meet the definition of a confined space but do not contain active or potential hazards that require a permit, they are all examples of non-permit required confined spaces.

Answer:

• (A) Walk-in freezer or refrigerator
• (B) Air plenum (a box that connects to the HVAC system)
• (C) Pipe chase (a narrow space that houses plumbing)
• (D) All of the above (Correct answer)