New York Low Pressure Boiler COF Practice 2026 – All-in-One Guide to Exam Success!

The correct choice is one that requires the valve to be sealed open and locked. This is important for a valve that serves as a shut-off for a water column because it ensures that the valve remains in an open position, allowing the proper flow of water to the water column, which is critical for accurate readings and operation.

When the valve is sealed open, it indicates that it is intended for use in flowing conditions, which is necessary for maintaining the water column's function, especially in a low-pressure boiler setting where accurate pressure readings are vital for safety and operation. Locking the valve adds a layer of security, preventing any unintentional adjustments that could lead to improper function or safety risks.

In contrast, other options involve having the valve sealed closed, which would obstruct water flow and consequently hinder the operation of the water column, thus causing problems for the boiler system. Having the valve unlocked while sealed closed or open can be risky, as it may lead to unauthorized changes in the settings that can compromise the system's integrity.