Red Seal Oil Heat System Technician Practice Exam

What is a common sign of a clogged oil filter?

1. The system experiences high fuel pressure

2. The system experiences low fuel pressure

3. The burner operates continuously

4. The oil tank is leaking

The correct answer is: The system experiences low fuel pressure

A clogged oil filter restricts the flow of fuel to the burner, which leads to lower fuel pressure in the system. As the filter becomes more obstructed, it hampers the ability of the pump to deliver adequate fuel, resulting in a noticeable drop in pressure. This low fuel pressure can cause various operational issues, such as inconsistent burner operation or even failure to ignite properly, emphasizing the importance of maintaining clean filters for optimal system performance. The other choices do not accurately represent the effects of a clogged oil filter. High fuel pressure typically indicates unrestricted flow, which would not occur with a clogged filter. Continuous operation of the burner can happen for various reasons, including control issues, rather than directly being a symptom of a clogged filter. Lastly, a leaking oil tank is unrelated to the condition of the oil filter; it indicates a separate issue that requires attention. Hence, identifying low fuel pressure as a sign of a clogged oil filter is crucial in diagnosing and maintaining an efficient oil heat system.