Quantcast Questions for Self-study -Cont. - mo4050244

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6-12 What is needed yearly to maintain synthetic oil?
a)
Replacement
pH adjustment
b)
c)
Rebuffering
d)
Nothing
6-13 What are typical on/off differentials in degrees F for solar controls?
a)
5/20
b)
20/5
c)
1/5
d)
1/20
6-14 Why is water periodically drained from a solar storage tank?
a)
To
check the back-up heating thermostat
b)
To
check the thermistor sensor
c)
To
remove fallen sediment
d)
To
remove scale from the tank walls
MAINTENANCE
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6.3 QUESTIONS FOR SELF-STUDY





 


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