New York Low Pressure Boiler COF Test 2025 – 400 Free Practice Questions to Pass the Exam

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What is the minimum size for a blow down valve?

1/2 inch

3/4 inch

The minimum size for a blow down valve is typically specified as 3/4 inch to ensure proper functioning and adequate drainage of the boiler's blow down water. This size allows for effective removal of sediments and scale build-up that can occur within the boiler system. A blow down valve is critical for maintaining water quality within the boiler, and using a valve size that is too small could restrict flow and lead to operational issues, such as inefficient blow down or potential damage to the equipment.

Selecting the appropriate size is fundamental for operational safety and efficiency in boiler management. In contrast, other sizes either exceed the standard requirement or do not meet the minimum necessary to maintain effective blow down procedures, impacting the boiler's overall performance.

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1 inch

1-1/2 inches

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