When is the B terminal energized on most low-voltage thermostats?
A) Whenever the thermostat calls for cooling
B) Whenever the system switch is moved to "Heat"
C) Whenever the system switch is moved to "Cool"
D) Whenever the thermostat calls for first-stage heat
B
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The two types of particleboard used in cabinetmaking are _____.
a. veneer and solid b. mat-formed and extruded c. oak and ash d. plywood and OSB
A(n) ____________________ circuit is generally defined as the circuit conductors that extend from the last circuit protective device for overcurrent to the power utilization (outlet).
Fill in the blank(s) with the appropriate word(s).
The outdoor air cooled condensing unit consists of
A) a compressor, condenser coil, a condenser fan, evaporator coil, and the necessary electrical control box assembly B) copper tubing surrounded by aluminum fins and a condenser fan, and the necessary electrical control box assembly C) a compressor, condenser coil, a condenser fan, and the necessary electrical control box assembly D) copper tubing surrounded by aluminum fins and a condenser fan, a refrigerant expansion device, and the necessary electrical control box assembly
Power gain
A) equals load voltage squared divided by load resistance B) is the ratio of the power delivered to the load versus input power C) both a and b D) none of the above