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 3-6 Pressurized solar storage tanks must have which one of these?
a)
Backflow preventer
b)
Tempering valve
c)
T&P
d)
Vacuum breaker
3-7 What can happen if you install an expansion tank on the discharge side of a
pump in a closed loop?
a) Nothing
b) Pump cavitation
c) Excessive pressure on the suction side of the pump
d) Expansion tank damage
3-8 Turn to the "typical pump curve" diagram in Section 3.1.4. If the two gauges on
each side of the pump read 50 PSI at rest, and 40 PSI and 60 PSI when the
pump is running, what is the flow rate?
a) About 10 GPM
b) About 15 GPM
c) About 20 GPM
d) About 25 GPM
3-9 Which is the most reasonable set of temperatures for the inlets and outlets of a
heat exchanger of a closed-loop system during normal operation on a sunny
day? (All temperatures in degrees F.)
To collectors From collectors To storage From storage
a) 100
120
60
55
b) 120
100
60
60
c) 120
100
55
60
d) 100
100
60
55
INSPECTION
3.4 QUESTIONS FOR SELF-STUDY
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