Question

q9: a technician should replace a cabin filter when the air flow _. is restricted has a musty odor feels humid does not feel cool

Explanation:

A restricted air - flow is a common sign that a cabin filter needs replacement as the filter may be clogged. Musty odor can be due to mold but not always a sign for immediate filter replacement. Humid air and air not feeling cool are usually related to other issues like the HVAC system or refrigerant levels rather than just the filter.

Answer:

A. Is restricted