Question 225Steam Plants - 1st Asst/Chief

The correct answer is C) air cooler section. In a main condenser, the vacuum drag line is specifically connected to the air cooler section. This is because the air cooler section is where non-condensable gases, such as air, accumulate and need to be removed to maintain the desired vacuum in the condenser. Connecting the vacuum drag line to this area allows the non-condensable gases to be effectively evacuated, improving the condenser's overall efficiency. The other options are incorrect because: A) the hotwell is not the location for the vacuum drag line, B) the steam lane does not contain the non-condensable gases, and D) the main tube bank is not the appropriate location for the vacuum drag line connection.