The auxiliary exhaust system shown in the...

The auxiliary exhaust system shown in the illustration can be supplied by steam from the __________. Illustration SG-0024

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🔍 Key Concepts

• Follow the piping and arrows on the diagram to see where make‑up steam is added to the auxiliary exhaust/DFT system. • Compare the labeled connections from the turbine bleed systems (around the H.P. and L.P. turbines) to see which one actually ties into the auxiliary exhaust line. • Notice which lines are exhausts to condensers versus controlled steam supplies (with pressure‑reducing valves and set pressures).

💭 Think About

• Starting at the deaerating feed tank and auxiliary exhaust header, trace backwards along the steam line: where does the augmenting steam come from when auxiliary exhaust pressure is too low? • Look carefully near the H.P. and L.P. turbines: which bleed connection is drawn going toward the auxiliary exhaust/DFT, and which is not connected to it at all? • Do any lines from the distilling plant or turbo‑generators feed into the auxiliary exhaust, or do they only discharge steam/exhaust away from it? What does that tell you about which choices are plausible?

✅ Before You Answer

• Confirm which line into the auxiliary exhaust/DFT has a pressure‑reducing valve and setting that matches typical auxiliary exhaust pressure in the table (around 30–40 psig). • Verify that the source you pick actually has a solid arrowed line leading to the auxiliary exhaust/DFT—not a dashed line or one going to a condenser. • Double‑check that the system you choose is the only one shown on the drawing as a supply to the auxiliary exhaust; eliminate any option whose piping never connects to that header.

🔍 Key Concepts

💭 Think About

✅ Before You Answer