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2015 General Class FCC Element 3 Question Pool
2015 General Class FCC Element 3 Question Pool

10-12-04 Air Conditioner Bulletin A27
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... The Analog Control Box comes in 3 different configurations, that are not interchangeable. The Analog Control Board consists of several relays, plug receptacles and other components. If any one of these are defective the entire Analog Control Box should be replaced. The Analog Control Box works with ...
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Alternating current



Alternating current (AC), is an electric current in which the flow of electric charge periodically reverses direction, whereas in direct current (DC, also dc), the flow of electric charge is only in one direction. The abbreviations AC and DC are often used to mean simply alternating and direct, as when they modify current or voltage.AC is the form in which electric power is delivered to businesses and residences. The usual waveform of alternating current in most electric power circuits is a sine wave. In certain applications, different waveforms are used, such as triangular or square waves. Audio and radio signals carried on electrical wires are also examples of alternating current. These types of alternating current carry information encoded (or modulated) onto the AC signal, such as sound (audio) or images (video).
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