In this drawing of a radiator cap, what is occurring within the cooling system?
A) The system is cooling down
B) The system is overheating
C) Coolant is returning to the radiator
D) Both A and C
D) Both A and C
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Tolerance in most switches is about 2%; ____________________ is about 1%.
Fill in the blank(s) with the appropriate word(s).
There are two basic types of thermostats used in the industry today: the ____________________ thermostat and the line voltage thermostat.
Fill in the blank(s) with the appropriate word(s).
Noncondensable gases have a negative effect on system performance because, if not removed, they will migrate to the condenser coil. This leads to a number of problems. List six such problems.
What will be an ideal response?
Sealed combustion oil furnaces use:
A) A separate bottled oxygen supply for cleaner combustion. B) Special sealed airtight barometric draft regulators. C) High static oil burners. D) No vent because the combustion chamber is sealed.