Question

technician a says that when more air is entering a spraybooth than is removed, it is considered to have negative pressure.
technician b says that negative air pressure draws more overspray through spraybooth filters than positive air pressure.
who is right?
a) a only
b) b only
c) both a and b
d) neither a nor b

Explanation:

• Technician A is incorrect: When more air enters a spraybooth than is removed, this creates positive pressure, not negative pressure. Negative pressure occurs when more air is removed than enters.
• Technician B is correct: Negative air pressure in a spraybooth pulls air (and overspray) inward through the filters, which is more effective at capturing overspray than positive pressure (where air pushes outward, potentially allowing overspray to escape).

Answer:

B) B only