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3
UNIVERSAL HYDRONIC CONCEPTS
ANSWERS TO TEXTBOOK QUESTIONS AND EXERCISES
1. An expansion tank accommodates expected pressure changes associated with water
2. A 3-way mixing valve is used to blend cool water returning from the heat emitters with
3. A pressure reducing valve is used in the make-up water system because the supply
4. Two advantages of a closed-loop hydronic system compared with an open-loop system
5. 429 gallons
9. (a) 16 gal/min (b) 5.3 gal/min
11. Specific heat
17. 4.5 percent dissolved air will be expelled.
24. For flow rates of 0.5, 1, 2, 5, and10 gpm, the corresponding head losses are 0.56, 1.9, 6.3,
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