A basic comparison can be made between a low pressure evaporator operation and a main condenser with regards to the removal of non-condensable gases. The vacuum drag line for the main condenser is specifically connected in which area?

Correct Answer: Option C — air cooler section

In marine main condensers, the vacuum drag or air-removal suction line connects specifically to the air cooler section. Baffles isolate this zone to concentrate non-condensable gases, maximizing the air-vapor mixture density and improving vacuum extraction efficiency via air ejectors.