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FCC TECHNICIAN Exam Question Pool. Subelement 3AF. Circuit Components. 2 Questions. --------------------------------------------------- 3AF 1-1.1 B What are the four common types of resistor construction? A. Carbon-film, metal-film, micro-film and wire-film B. Carbon-composition, carbon-film, metal-film and wire-wound C. Carbon-composition, carbon-film, electrolytic and metal-film D. Carbon-film, ferrite, carbon-composition and metal-film 3AF 1-2.1 D What is the primary function of a resistor? A. To store an electric charge B. To store a magnetic field C. To match a high-impedance source to a low-impedance load D. To limit the current in an electric circuit 3AF 1-2.2 C What is a variable resistor? A. A resistor that changes value when an ac voltage is applied to it B. A device that can transform a variable voltage into a constant voltage C. A resistor with a slide or contact that makes the resistance adjustable D. A resistor that changes value when it is heated 3AF 1-3.1 A What do the first three color bands on a resistor indicate? A. The value of the resistor in ohms B. The resistance tolerance in percent C. The power rating in watts D. The value of the resistor in henrys 3AF 1-3.2 B How can a carbon resistor's electrical tolerance rating be found? A. By using a wavemeter B. By using the resistor's color code C. By using Thevenin's theorem for resistors D. By using the Baudot code 3AF 1-3.3 B What does the fourth color band on a resistor indicate? A. The value of the resistor in ohms B. The resistance tolerance in percent C. The power rating in watts D. The resistor composition 3AF 1-3.4 C When the color bands on a group of resistors indicate that they all have the same resistance, what further information about each resistor is needed in order to select those that have nearly equal value? A. The working voltage rating of each resistor B. The composition of each resistor C. The tolerance of each resistor D. The current rating of each resistor 3AF 1-4.1 A Why do resistors generate heat? A. They convert electrical energy to heat energy B. They exhibit reactance C. Because of skin effect D. To produce thermionic emission 3AF 1-4.2 C Why would a large size resistor be substituted for a smaller one of the same resistance? A. To obtain better response B. To obtain a higher current gain C. To increase power dissipation capability D. To produce a greater parallel impedance 3AF 1-5.1 B What is the symbol used to represent a fixed resistor on schematic diagrams? . A. ┌─┬─┬─┬─┬─┬─┬─┐ B. │ │ │ │ │ │ │ │ ──/\/\/\/\/\/\── . . . C. D. ┌ ──┤├── ──│── └ . 3AF 1-5.2 C What is the symbol used to represent a variable resistor on schematic diagrams? ─┐ A. ┌─┬─┬─┬─┬─/─┬─┐ B. \ │ │ │ │ / │ │ │ ──┤├── / \ ─┘ . ─┐ C. / D. ──/\/\/\/\/\/\── ──/\/\/\/\/\/\── / │ . 3AF 2-1.1 D What is an inductor core? A. The point at which an inductor is tapped to produce resonance B. A tight coil of wire used in a transformer C. An insulating material placed between the plates of an inductor D. The central portion of a coil; may be made from air, iron, brass or other material 3AF 2-1.2 A What are the component parts of a coil? A. The wire in the winding and the core material B. Two conductive plates and an insulating material C. Two or more layers of silicon material D. A donut-shaped iron core and a layer of insulating tape 3AF 2-1.3 D Describe an inductor? A. A semiconductor in a conducting shield B. Two parallel conducting plates C. A straight wire conductor mounted inside a Faraday shield D. A coil of conducting wire 3AF 2-1.4 C For radio frequency power applications, which type of inductor has the least amount of loss? A. Magnetic wire B. Iron core C. Air core D. Slug tuned 3AF 2-2.1 D What is an inductor? A. An electronic component that stores energy in an electric field B. An electronic component that converts a high voltage to a lower voltage C. An electronic component that opposes dc while allowing ac to pass D. An electronic component that stores energy in a magnetic field 3AF 2-2.2 C What are the electrical properties of an inductor? A. An inductor stores a charge electrostatically and opposes a change in voltage B. An inductor stores a charge electrochemically and opposes a change in current C. An inductor stores a charge electromagnetically and opposes a change in current D. An inductor stores a charge electromechanically and opposes a change in voltage 3AF 2-3.1 D What factors determine the amount of inductance in a coil? A. The type of material used in the core, the diameter of the core and whether the coil is mounted horizontally or vertically B. The diameter of the core, the number of turns of wire used to wind the coil and the type of metal used in the wire C. The type of material used in the core, the number of turns used to wind the core and the frequency of the current through the coil D. The type of material used in the core, the diameter of the core, the length of the coil and the number of turns of wire used to wind the coil 3AF 2-3.2 B What can be done to raise the inductance of a 5-microhenry air-core coil to a 5-millihenry coil with the same physical dimensions? A. The coil can be wound on a non-conducting tube B. The coil can be wound on an iron core C. Both ends of the coil can be brought around to form the shape of a donut, or toroid D. The coil can be made of a heavier-gauge wire 3AF 2-3.3 A As an iron core is inserted in a coil, what happens to the inductance? A. It increases B. It decreases C. It stays the same D. It becomes voltage-dependent 3AF 2-3.4 B As a brass core is inserted in a coil, what happens to the inductance? A. It increases B. It decreases C. It stays the same D. It becomes voltage-dependent 3AF 2-4.1 A What is the symbol used to represent an adjustable inductor on schematic diagrams? ─┐ A. ┌─┬─┬─┬─┬─/─┬─┐ B. \ │ │ │ │ / │ │ │ ──┤├── / \ ─┘ . ─┐ C. / D. ──/\/\/\/\/\/\── ──/\/\/\/\/\/\── / . 3AF 2-4.2 B What is the symbol used to represent an iron-core inductor on schematic diagrams? A. ════════════ B. ═════════════ ──/\/\/\/\/\/\─ ┌─┬─┬─┬─┬─┬─┐ │ │ │ │ │ │ │ . ┌─┐║ C. ─┤ │║ D. ═══════════ ─┤ │║ ┌───────┐ └─┘║ ──┤ Z ├── └───────┘ . 3AF 2-4.3 C What is the symbol used to represent an inductor wound over a toroidal core on schematic diagrams? ╔═════════╗ A. ═════════ B. ║┌─┬─┬─┬─┐║ ┌─┐ ║├─ ─┤║ ───┤ ├─── ║├─ ─┤║ └─┘ └─┐ ┌─┘ . . C. ═════════════ D. ═══════════ ┌─┬─┬─┬─┬─┬─┐ ┌───────┐ │ │ │ │ │ │ │ ──┤ Z ├── └───────┘ 3AF 3-1.1 D What is a capacitor dielectric? A. The insulating material used for the plates B. The conducting material used between the plates C. The ferrite material that the plates are mounted on D. The insulating material between the plates 3AF 3-1.2 A What are the component parts of a capacitor? A. Two or more conductive plates with an insulating material between them B. The wire used in the winding and the core material C. Two or more layers of silicon material D. Two insulating plates with a conductive material between them 3AF 3-1.3 C What is an electrolytic capacitor? A. A capacitor whose plates are formed on a thin ceramic layer B. A capacitor whose plates are separated by a thin strip of mica insulation C. A capacitor whose dielectric is formed on one set of plates through electrochemical action D. A capacitor whose value varies with applied voltage 3AF 3-1.4 C What is a paper capacitor? A. A capacitor whose plates are formed on a thin ceramic layer B. A capacitor whose plates are separated by a thin strip of mica insulation C. A capacitor whose plates are separated by a layer of paper D. A capacitor whose dielectric is formed on one set of plates through electrochemical action 3AF 3-2.1 B What is a capacitor? A. An electronic component that stores energy in a magnetic field B. An electronic component that stores energy in an electric field C. An electronic component that converts a high voltage to a lower voltage D. An electronic component that converts power into heat 3AF 3-2.2 D What are the electrical properties of a capacitor? A. A capacitor stores a charge electrochemically and opposes a change in current B. A capacitor stores a charge electromagnetically and opposes a change in current C. A capacitor stores a charge electromechanically and opposes a change in voltage D. A capacitor stores a charge electrostatically and opposes a change in voltage 3AF 3-2.3 A What factors must be considered when selecting a capacitor for a circuit? A. Type of capacitor, capacitance and voltage rating B. Type of capacitor, capacitance and the kilowatt-hour rating C. The amount of capacitance, the temperature coefficient and the KVA rating D. The type of capacitor, the microscopy coefficient and the temperature coefficient 3AF 3-2.4 B How are the characteristics of a capacitor usually specified? A. In volts and amperes B. In microfarads and volts C. In ohms and watts D. In millihenrys and amperes 3AF 3-3.1 A What factors determine the amount of capacitance in a capacitor? A. The dielectric constant of the material between the plates, the area of one side of one plate, the separation between the plates and the number of plates B. The dielectric constant of the material between the plates, the number of plates and the diameter of the leads connected to the plates C. The number of plates, the spacing between the plates and whether the dielectric material is N type or P type D. The dielectric constant of the material between the plates, the surface area of one side of one plate, the number of plates and the type of material used for the protective coating 3AF 3-3.2 B As the plate area of a capacitor is increased, what happens to its capacitance? A. Decreases B. Increases C. Stays the same D. Becomes voltage dependent 3AF 3-3.3 D As the plate spacing of a capacitor is increased, what happens to its capacitance? A. Increases B. Stays the same C. Becomes voltage dependent D. Decreases 3AF 3-4.1 D What is the symbol used to represent an electrolytic capacitor on schematic diagrams? ┌─┐ A. ┌┬───┬┐─┼─ B. ││ ││ ─┼─ ───┤│ │├─── ───┤│ │├─── └┴───┴┘ ││ ││ └─┘ . . C. │ D. │ │ ─┼─ ───┤ ├─── ───┤ ├─── ── │ ─┼─ │ │ . 3AF 3-4.2 A What is the symbol used to represent a variable capacitor on schematic diagrams? A. ─┐ B. ─┐ │ │/ ─┼─│ /── ───┤/├─── ───┤/├─── /│ │ /│ . . C. ┌─┐ ─┐ D. ─┐ ││ ││/ / ───┤│ /├─── ────< / >──── │/ ││ / / └─┘ / -------------------------------------------------- End of Subelement 3AF.