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2-11 Which type of insulation can be used anywhere on a solar system and does not
require moisture protection?
a)
Elastomeric
b)
Fiber glass
c)
Urethane foam
d)
Polystyrene
2-12 When the temperature of a typical 10K thermistor goes up, what happens?
a)
Its
resistance increases
b)
Its
resistance decreases
c)
Its
voltage increases
d)
Its
voltage decreases
2-13 What is a device with two temperature sensors and a flow meter called?
a)
A differential thermostat
b)
An aquastat
c)
A proportional control
d)
A BTU meter
OPERATION
60
2.8 QUESTIONS FOR SELF-STUDY





 


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