New York Low Pressure Boiler COF Practice 2025 - Free Practice Questions and Study Guide

Miniature boilers, which are defined by their smaller capacity and limited size, require a single safety valve to ensure the safe operation of the system. The safety valve is a crucial component designed to automatically release excess pressure from the boiler to prevent potentially dangerous situations such as an explosion or equipment failure.

The design of miniature boilers dictates that only one safety valve is necessary to manage the pressure effectively, as the volume of steam produced is low enough that a single valve can handle any excess pressure that may develop. Furthermore, these safety valves are typically set to the manufacturer's prescribed pressure limit, ensuring they open at a predefined pressure threshold to maintain safe operating conditions.

The other options, while relevant to different contexts, are not applicable here. A multi-valve system may be used in larger or more complex boiler systems where multiple points of control are necessary, but this is not required for miniature boilers. A double block valve is utilized in certain systems for added safety by preventing flow in both directions but again, is not limited to miniature setups. Lastly, while pressure relief valves are a key aspect of many systems, they typically refer to a broader category encompassing various pressure relief devices, of which the safety valve is a specific type designed for this exact application in miniature boilers.