Which component in the propulsion system is directly associated with receiving steam from a 600/150-psi reducing station?

Which component in the propulsion system is directly associated with receiving steam from a 600/150-psi reducing station?

• A. Main air ejectors
• B. Lube oil filter
• C. Diesel start air compressor
• D. Feedwater heater

Answer: (A)

The main air ejectors are steam-powered vacuum devices that pull non-condensables from the main condenser. They run on steam supplied at a controlled pressure from the 600/150-psi reducing station, making them the component most directly fed by that steam source. The other options don’t rely on receiving steam from this reducing station in the same direct way: the lube oil filter handles lubrication oil, the diesel start air compressor uses compressed air, and while a feedwater heater does use steam, it isn’t the primary recipient of the reduced-pressure steam for propulsion plant operation.

The main air ejectors are steam-powered vacuum devices that pull non-condensables from the main condenser. They run on steam supplied at a controlled pressure from the 600/150-psi reducing station, making them the component most directly fed by that steam source. The other options don’t rely on receiving steam from this reducing station in the same direct way: the lube oil filter handles lubrication oil, the diesel start air compressor uses compressed air, and while a feedwater heater does use steam, it isn’t the primary recipient of the reduced-pressure steam for propulsion plant operation.