PPV in confined space ventilation stands for?

• A. Positive Pressure Ventilation
• B. Pulse Pressure Ventilation
• C. Partial Pressure Ventilation
• D. Personal Protective Ventilation

Answer: (A)

Positive Pressure Ventilation means forcing fresh air into a confined space to raise the internal pressure, which helps push contaminants and hazardous gases out of the space and toward an exhaust path. In practice, a blower or fan pushes air through ducting into the space, creating a flow that displaces polluted air and maintains a breathable atmosphere for workers. This method is favored in many confined-space operations because it actively supplies oxygen and removes contaminants, provided the airflow is adequately sized and there’s a clear exhaust path.

The other terms don’t fit because they aren’t recognized ventilation methods in this context. Pulse Pressure Ventilation isn’t a standard term for confined-space air delivery, Partial Pressure Ventilation isn’t used in fire service practice, and Personal Protective Ventilation is not a defined method of delivering air—PPE is generally equipment worn to protect the wearer, not a ventilation approach.