Question 144Motor Plants - QMED

The correct answer is A) Main engine cylinder jacket cooling water system. The deaerator is typically located in the main engine cylinder jacket cooling water system, which is responsible for removing dissolved gases from the cooling water to prevent corrosion and cavitation in the engine. This is a key component of the diesel propulsion plant fresh water cooling system, as maintaining the proper water quality is essential for the reliable operation of the main engine. The other answer choices do not accurately represent the location of the deaerator, as the fuel injector cooling, SSDG cylinder jacket, and piston cooling systems are separate subsystems within the overall diesel propulsion plant cooling arrangement.