The windings of a three-phase motor are:
A) 90 apart. B) 360 apart. C) 180 apart. D) 120 apart.
[Ques. 2] What is the purpose of a Tattle Tale?
A) To tell the technician if the limits have opened at any time during the unit's operation
B) To prevent the limits from ever being exceeded in the furnace
C) To tell the electric furnace to turn off if the limits have been exceeded
D) To tell the technician if the furnace is turning on properly
[Ques. 3] Communicating systems operate by:
A) Sending control signals over telephone wires.
B) Sending serial computer communications down a small number of wires.
C) Sending 24 V to each component that must be energized.
D) Connecting to the manufacturer's website via satellite connections.
[Ques. 4] Select the conditions that increase building pressure.
A) Exhaust blowers
B) Vented combustion appliances
C) Exfiltration
D) Infiltration
E) Makeup air blowers
[Ques. 5] Overheating can cause a terminal to discolor or the wiring insulation to melt. What should you consider when repairing the wire or the terminal?
A) It is recommended to replace the entire wire with another wire of the same or larger gauge. If the terminal is on a relay, sequencer, or fuse block, the component should also be replaced in addition to the wire.
B) Replace the terminal end only. It is okay to cut off the end and repair the wire. If the terminal is on a relay, sequencer, or fuse block, the component should also be replaced in addition to the wire.
C) It is recommended to replace the entire wire with another wire of the same or larger gauge. If the terminal is on a relay, sequencer, or fuse block, only the wire needs to be replaced. The component does not need to be replaced.
D) Replace the terminal end only. It is okay to cut off the end and repair the wire. If the terminal is on a relay, sequencer, or fuse block, only the wire needs to be replaced. The component does not need to be replaced.
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