Technician A says the third prong on a 110-volt electrical plug is for a safety ground. Technician B says the third prong on a 110-volt electrical plug can be removed before use. Who is correct?
A. A only
B. B only
C. both A and B
D. neither A nor B
Answer: A
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A split system is designed in two sections: a condensing unit and a device that is used for the air flow in the system and the heat source if it is not a heat pump.
Answer the following statement true (T) or false (F)
Answer the following statement(s) true (T) or false (F)
1. Few homes are wired for three-wire service. 2. Electric ranges and clothes dryers are designed for three-wire operation. 3. The three wires terminate in the residence at the load center panel so that most individual circuits carried through the house are at 240 volts. 4. The neutral is carried through the system as an unfused or switched conductor. 5. In a series circuit, the highest voltage appears across the highest value of resistance.
If the field coil of a shunt DC motor opens, the speed of the shaft will __________.
A. slow down B. speed up C. stay the same
Three-inch rigid conduit is bent using a(n) _____.
a. speed bender b. mechanical bender c. electric bender d. hydraulic bender