Which of the following statements about Level D ensembles is true?

Level D ensembles are designed primarily for situations where there is no significant risk from hazardous materials, often termed as nuisance contamination. This means they are suitable for environments where only minimal or non-toxic chemical exposure is expected. The primary function of these ensembles is to provide a basic level of protection, typically against non-hazardous particulates, and they do not offer the respiratory protection or full-body coverage found in higher levels of protection.

The other statements about Level D ensembles do not align with their purpose and capabilities. For instance, Level D does not provide respiratory protection, nor is it meant for use in the hot zone where more hazardous materials may be present. Additionally, Level D ensembles are not encapsulating; they are usually non-encapsulating suits designed for minimal exposure. This distinction is crucial when determining the appropriate level of protection needed in various emergency response situations.