4th Class Power Engineering Part B Practice Exam

The primary purpose of a condensate return system is to recycle condensate back to the boiler for water reuse. In a steam system, when steam is used in processes or heating applications, it condenses back into water—known as condensate. By returning this condensate to the boiler, the system enhances efficiency and conserves water.

Recycling condensate is advantageous because it is typically at high purity and temperature, requiring less energy to convert back to steam compared to using fresh water. The system also helps maintain water levels in the boiler, preventing issues associated with low water levels, which could lead to overheating and damage to boiler components.

The other options address different aspects of steam and energy management. While recycling steam could be relevant to some systems, the focus of a condensate return system is specifically on returning the water ("condensate") to the boiler for reuse. Similarly, while increasing fuel efficiency or lowering pressure might be goals for overall system design, they are not the primary purpose of the condensate return system itself.