What are the typical components of a water-tube boiler?

The typical components of a water-tube boiler include drums, tubes, headers, and steam separators, making this the correct choice.

In a water-tube boiler, water is contained within the tubes, and the combustion gases pass around them, allowing for efficient heat transfer. The drum serves as a reservoir of water and steam, where the water is heated to produce steam. Headers are used to distribute water to the tubes and collect steam from them, ensuring proper flow and pressure management within the system. Steam separators are crucial for removing water droplets from the steam before it exits the boiler, providing dry steam for the application.

This configuration is essential for the operation of water-tube boilers, which are often used in high-pressure applications due to their ability to withstand greater pressure compared to fire-tube boilers. Understanding these components is key for analyzing the functionality and efficiency of water-tube boilers in power engineering contexts.