What does positive air pressure within a room do?

What does positive air pressure within a room do?

• A. Creates an airlock
• B. Helps prevent outside contaminants from entering the room
• C. Promotes the growth of bacteria in a room
• D. Prevents the contaminants in a room from escaping

Answer: (B)

Positive air pressure means the air inside a room is at a higher pressure than the surrounding areas, so when doors or openings are used, air tends to flow outward from the room. That outward movement helps keep outside contaminants from entering the space, since the higher-pressure air acts as a barrier against intrusion. This is a common strategy for protecting clean or sterile environments and animals from outside contamination. It’s not about creating an airlock by itself, it doesn’t promote bacterial growth, and while the outward flow helps keep outside air out, it doesn’t primarily prevent contamination from escaping the room (the opposite effect can occur if there are leaks).

Positive air pressure means the air inside a room is at a higher pressure than the surrounding areas, so when doors or openings are used, air tends to flow outward from the room. That outward movement helps keep outside contaminants from entering the space, since the higher-pressure air acts as a barrier against intrusion. This is a common strategy for protecting clean or sterile environments and animals from outside contamination. It’s not about creating an airlock by itself, it doesn’t promote bacterial growth, and while the outward flow helps keep outside air out, it doesn’t primarily prevent contamination from escaping the room (the opposite effect can occur if there are leaks).