Question 47Steam Plants - QMED

The correct answer is A) excessive steam leakage at the turbine glands. When the gland leak-off exhaust fan motor fails, the primary indication is excessive steam leakage at the turbine glands. This is because the gland leak-off exhaust fan plays a critical role in maintaining a proper vacuum and preventing steam leakage at the turbine glands. If the fan fails, the turbine gland seals will no longer be effectively ventilated, leading to increased steam leakage. The other options are incorrect because they do not directly indicate a failure of the gland leak-off exhaust fan. Increased turbine exhaust temperature (B), water knock on the turbine gland steam header (C), and loss of vacuum at the turbine (D) could be caused by other issues and are not the immediate, first indication of the gland leak-off exhaust fan motor failure.