Energize Your Future: Ace the 4th Class Power Engineering 4B7 Exam 2026!

When the boiler drum level is too high, the steam space becomes smaller and separation of steam from water is less effective. Water is then more likely to be carried with the steam as carryover. This results in wet steam that contains water droplets and impurities entering the turbine and downstream equipment. The most serious outcome is damage to turbines and heat exchangers from moisture and corrosive constituents, and from the physical erosion of turbine blades. While high drum level can cause other issues, the primary and most consequential risk is the carryover of boiler water with the steam.