Arkansas Boiler Operator Practice Exam 2025 - Free Boiler Operator Practice Questions and Study Guide.

The primary function of the feed pump in boiler operation is to inject water into the boiler system. In a steam boiler, maintaining an appropriate water level is crucial for safe and efficient operation. The feed pump ensures that the boiler has a continuous supply of water to replace the water that is converted to steam and vented as exhaust. This helps prevent boiling dry, which can lead to overheating and potentially cause damage to the boiler.

While maintaining boiler pressure is important, it is primarily the job of the boiler controls and safety valves, not directly of the feed pump. Similarly, removing sludge or controlling temperature involves different systems and processes within the boiler operation and does not fall under the direct purview of the feed pump. Thus, the function of the feed pump is specifically centered around the intake of water into the system, making the option about injecting water into the boiler system the correct choice.