Commercial Kitchen Exhaust System Components Practice Test

What is the purpose of a grease filter differential pressure gauge?

To measure room humidity. To monitor filter performance and indicate when cleaning or replacement is needed. To regulate air speed. To test electrical continuity.

Correct Answer:

To monitor filter performance and indicate when cleaning or replacement is needed.

Explanation:

The purpose of a grease filter differential pressure gauge is to monitor how dirty the grease filter is by measuring the pressure difference across it. As grease accumulates on the filter, it becomes harder for air to pass through, so the pressure before the filter rises relative to the air after it. When this pressure difference reaches a set point, it signals that the filter needs cleaning or replacement to restore proper airflow, protect the exhaust fan from strain, keep energy use efficient, and reduce fire risk from excessive grease buildup. This tool isn’t about room humidity, not used to regulate air speed directly, and not for testing electrical continuity.

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