The exhaust steam source in a turbine-driven boiler system is the turbine.

The exhaust steam source in a turbine-driven boiler system is the turbine.

• A. Turbine
• B. Boiler
• C. Condenser
• D. Economizer

Answer: (A)

In a turbine-driven boiler system, the steam that leaves as work has already expanded through the turbine blades. That steam exiting the turbine is the exhaust steam, so the turbine is its source. The boiler creates the initial high-pressure steam, but once it has done work in the turbine, the remaining steam exiting the turbine is the exhaust. The condenser simply accepts and condenses this exhaust, while an economizer helps preheat feedwater using heat from other sources, not generating the exhaust itself. So the turbine is the source of the exhaust steam.

In a turbine-driven boiler system, the steam that leaves as work has already expanded through the turbine blades. That steam exiting the turbine is the exhaust steam, so the turbine is its source. The boiler creates the initial high-pressure steam, but once it has done work in the turbine, the remaining steam exiting the turbine is the exhaust. The condenser simply accepts and condenses this exhaust, while an economizer helps preheat feedwater using heat from other sources, not generating the exhaust itself. So the turbine is the source of the exhaust steam.