The Survivair or MSA 401 are examples of which type of breathing apparatus?

• A. Self-contained - open circuit
• B. Self-contained - closed circuit
• C. Air-line breathing apparatus
• D. Non-powered air purifying respirators

Answer: (A)

The Survivair or MSA 401 are classified as self-contained – open circuit breathing apparatus. This type of apparatus provides the user with a supply of breathable air from a tank that is carried on the back. The “open circuit” designation means that the exhaled air is released into the environment rather than being recirculated for reuse.

Such breathing devices are particularly useful in environments where the air quality is compromised, allowing workers to breathe clean air while fully engaged in their tasks. They are commonly utilized in various industrial applications, including mining, for protection against hazardous atmospheres where respiratory protection is paramount.

This functionality is essential for safeguarding workers’ health and is crucial in emergency situations where breathable air is not available. Understanding these characteristics helps ensure the appropriate selection and use of breathing apparatus in hazardous working conditions.