🔍 Key Concepts

• Gland sealing steam purpose at turbine shaft penetrations • Effect of air leakage into a condenser on vacuum and turbine efficiency • Why a slight, controlled steam leakage at the glands can actually be desirable

💭 Think About

• Which choice best describes the overall function of the sealing steam system, not just one small detail? • Think about what would happen at the turbine end seals when the unit is at low load or turning gear speed—what must the system automatically take care of? • Would a properly designed gland system aim for zero leakage, or a very small, controlled amount in a particular direction?

✅ Before You Answer

• Identify which options describe preventing air from entering the turbine/condenser space. • Check which option mentions controlling or regulating pressure at different operating speeds and loads. • Decide whether the system is intended to have no leakage at all, or a small outward steam leakage to keep air from getting in.