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 3-10 At a minimum, what should glycol-based solar fluids be checked for?
a)
PH
b)
Pressure
c)
Dissolved copper
d)
Dissolved oxygen
3-11 At a minimum, what should oil-based solar fluids be checked for?
a) PH
b) Pressure
c) Dissolved copper
d) Dissolved oxygen
3-12 With all sensor wires disconnected, the switch in the "auto" position, and a
jumper across the collector sensor terminals, what should a functional
differential thermostat do?
a) Stop running the pump
b) Run the pump for a few minutes, then stop
c) Run the pump
d) Nothing
3-13 A 10K thermistor sensor has a measured resistance of 5000 ohms. What is
the sensors approximate temperature in degrees F?
a)
57
b)
77
c)
107
d)
212
3-14 A 3K thermistor sensor has a measured resistance of 5000 ohms. What is the
sensor's approximate temperature in degrees F?
a) 57
b) 77
c) 107
d) 212
3-15 The temperature of the solar fluid leaving the heat exchanger for the collector
should be:
a)
Lower than temperature of the fluid entering
b)
Equal to the temperature of the fluid entering
c)
Higher than the temperature of the fluid entering
d)
The same as the air temperature around the collector
INSPECTION
104
3.4 QUESTIONS FOR SELF-STUDY
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