HVAC Electrical Test Questions with Answers Graded A+

List what part (voltage source, switch, or load) is checked with the following meter function "VOLTAGE" - Voltage source, switch and load. AC electricity flows? - Both.....positive to negative and negative to positive. When electricity is present, which of the following are also present - Heat and magnetism What voltage is provided by the electric company to a modern residential home? - 220VAC What are the three lines entering the breaker panel? - Line 1 (hot) Line 2 (hot) and netural What is the difference between AC current and DC current? - DC = chemical reaction, travels in one direction and power is stored. AC = can not be stored, travels in both directions and magnetic field. What is the purpose of a breaker? - Is a safety device for an electrical circuit. What voltage does the average home appliance require to operate - 120V How does electricity get from one point to another (i.e. from the electric company to a home)? - Through insulated conductors such as copper wire. How does the electric company know how much a single residence has used? - Electric meter Where does electricity come from? - Electric company generates and sends to customer. What three things are needed for a complete circuit? - Voltage source, switch, load What are some good insulators? - Fiberglass, plastic, glass, rubber What are some good conductors - Copper, gold, aluminum How many volts are entering the home? Is it AC or DC? - 240/220 AC Where would you find DC voltage? - Battery, cars, cellphone, power tools etc What are the two things are needed to obtain a voltage reading? - Positive and negative