New York Low Pressure Boiler Certificate of Fitness (COF) Practice Test

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Prepare for the New York Low Pressure Boiler Certificate of Fitness Test with comprehensive quiz questions and explanations. Gain confidence and knowledge to ensure your success on the exam.

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What might cause a dirty oil strainer?

Low flow rates
Excessive pressure
Contaminated fuel
Improper installation

The correct answer is: Contaminated fuel

A dirty oil strainer can be primarily attributed to the presence of contaminated fuel. When fuel contains impurities such as dirt, rust, or water, these contaminants can accumulate in the oil strainer over time, leading to blockages and reduced efficiency. The role of the oil strainer is to filter out these particles to ensure that clean fuel reaches the burner, and if the fuel itself is contaminated, the strainer will inevitably become dirty. While factors like low flow rates and improper installation may influence the performance and maintenance needs of the system, they do not directly lead to the initial contamination of the fuel. Excessive pressure might lead to other issues within the system, but it does not primarily cause the strainer to become dirty. Hence, the presence of contaminated fuel is the main reason why an oil strainer would become dirty, making it the correct choice in this context.