Which of the following is true concerning...

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Question 1 of 2066636eee28f7522a1c51ea66

Which of the following is true concerning the class "D" air conditioning system shown in the following illustration? Illustration RA-0042

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Question 1 of 20

66636eee28f7522a1c51ea66

Which of the following is true concerning the class "D" air conditioning system shown in the following illustration? Illustration RA-0042

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🔍 Key Concepts

• Class "D" reheat-type central air conditioning system – how temperature is controlled in the main duct versus in each room • Role of the duct thermostat compared to the room thermostat in the schematic (what each one actually modulates) • Difference between chilled‑water (indirect) cooling coils and direct-expansion (DX, vapor compression) air conditioning units

💭 Think About

• From the illustration, trace what the duct thermostat is connected to. Does its control signal go to the chilled‑water cooling coil valve, the reheater, or something else? • Look at the room thermostat symbol by the reheater coil. What device does it operate, and does that change the room’s dry‑bulb temperature, wet‑bulb temperature, or something different? • Consider what happens to cooling load if you use more recirculated air and less outside air. Does that usually increase or decrease the amount of heat the system must remove?

✅ Before You Answer

• Verify in the legend which symbol is the duct thermostat and follow its control line to see what it modulates (especially around the cooling coil – chilled water). • Verify what fluid is going through the main cooling coil in the diagram (look for the label chilled water) and compare that to a direct-expansion vapor compression system. • Confirm that the room thermostat is located at (and directly controls) the reheater (hot water) valve for each space, and think about whether that would control dry‑bulb or wet‑bulb temperature.

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Question 1 of 2066636eee28f7522a1c51ea66

Which of the following is true concerning the class "D" air conditioning system shown in the following illustration? Illustration RA-0042

Back

Question 1 of 20

66636eee28f7522a1c51ea66

Which of the following is true concerning the class "D" air conditioning system shown in the following illustration? Illustration RA-0042

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

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