Question

Technician a says that when more air is entering a spray booth than is removed it is considered to have negative pressure technician b say the negative air pressure draws more overspray through spray booth filters than positive air pressure Who’s right

Answer 1

Both Technician A and Technician B are correct in their statements, but they are referring to different aspects of the spray booth operation.

Technician A is correct in stating that when more air is entering the spray booth than is being removed, it is considered to have negative pressure. Negative pressure means that the pressure inside the spray booth is lower than the pressure outside. This setup helps to contain the overspray and fumes within the booth, minimizing the risk of spreading them to the surrounding areas.

Technician B is also correct in stating that negative air pressure draws more overspray through the spray booth filters than positive air pressure. When the spray booth has negative pressure, it creates a suction effect. This suction draws the overspray particles towards the filters, improving their efficiency in capturing and removing the overspray from the air.

In summary, both technicians are correct in their statements. The negative pressure in the spray booth helps contain the overspray, and it also enhances the effectiveness of the booth's filters in capturing the overspray particles.

Answer 2

Technician A is incorrect and Technician B is correct.

In a spray booth, when the amount of air entering the booth is greater than the amount of air being removed, it is considered to have positive pressure. Conversely, when the amount of air being removed is greater than the amount of air entering, it is considered to have negative pressure. Therefore, Technician A's statement is incorrect.

On the other hand, Technician B's statement is correct. Negative air pressure can draw more overspray through spray booth filters because it creates a vacuum effect that draws in the overspray and helps prevent it from escaping into the rest of the work area. This is why spray booths are designed to have a negative pressure differential to help control overspray and keep the work environment safe.