If a main condenser were operating with a...

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Question 1 of 205eccef9cbacbc34ba4d4575c

If a main condenser were operating with a vacuum of 28.09 in. Hg, a condensate discharge temperature of 95°F, a seawater inlet temperature of 64°F and an overboard temperature of 72°F, which of the following would represent the condensate depression? See illustration SG-0026.

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🔍 Key Concepts

• Condensate depression in a main condenser (what two temperatures are compared) • How to read the Properties of Saturated Steam table for a given vacuum in. Hg to find the corresponding saturation temperature in °F • Distinguishing between temperature-based quantities (°F) and pressure/vacuum-based quantities (in. Hg)

💭 Think About

• From the given vacuum of 28.09 in. Hg, which temperature in the table should you pick, and in what units? • Once you have the saturation temperature from the table, which of the listed temperatures in the question should you subtract from it to get condensate depression? • Looking at the answer choices, which ones are in the correct units for condensate depression, and which are not?

✅ Before You Answer

• Be sure you are using the saturation temperature (°F) that corresponds exactly to 28.09 in. Hg from the table. • Confirm that you are subtracting the condensate discharge temperature, not the seawater temperatures, from the saturation temperature. • Make sure your final value is expressed in degrees Fahrenheit (°F) and matches one of the options.

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