Question 285Steam Plants - 1st Asst/Chief

The correct answer is B) combined low pressure feed heater. The illustration SG-0025 depicts a combined low pressure feed heater, which is a common component in marine steam propulsion systems. This type of heater is used to increase the temperature of the boiler feedwater by utilizing the thermal energy from the main steam system, thereby improving the overall efficiency of the steam plant. The other options are incorrect because: A) a Butterworth feed heater is used for cleaning the feedwater system, C) a flash evaporator salt water feed heater is used to desalinate seawater for boiler makeup, and D) a high pressure feed heater is a different component in the steam system, typically located upstream of the boiler.