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- FCC Technician Exam Question Pool. Subelement 3AE.
- Electrical Principals. 2 Questions.
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- 3E 2.1 D
- What is meant by the term RESISTANCE?
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- A. The opposition to the flow of current in an
- electrical circuit containing inductance.
- B. The opposition to the flow of current in an
- electrical circuit containing capacitance.
- C. The opposition to the flow of current in an
- electrical circuit containing reactance.
- D. The opposition to the flow of current in an
- electrical circuit that does not contain reactance.
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- 3E 2.2 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.
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- 3E 2.3 A
- What is a VARIABLE RESISTOR?
-
- A. A Resistor with a slide contact that
- makes the resistance adjustable
- B. A device that can transform a variable
- voltage into a constant voltage.
- C. A Resistor that changes value when
- an AC voltage is applied to it.
- D. A Resistor that changes value when heated.
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- 3E 2.4 A
- Why do Resistors generate heat?
-
- A. They convert electrical energy into heat energy.
- B. They exhibit reactance.
- C. Because of skin effect.
- D. To produce thermionic emission.
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- 3E 4.1 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.
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- 3E 4.2 D
- What factors determine the amount of Inductance in a coil?
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- A. The type of material used in the core,
- the diameter of the core, and whether the
- coil is mounted horizontal or vertical.
- B. The diameter of the core, the number of
- of turns of wire used used to wind the
- core and the type of metal usedin the wire.
- C. The type of material used in the core, the
- number of turns used to wind the coil, 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 used to wind the coil.
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- 3E 4.3 C
- What are the electrical properties of an Inductor.
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- 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.
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- 3E 4.4 A
- What is an Inductor CORE?
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- A. The central portion of a coil; it may be made
- from air, iron, brass, or other material.
- B. A tight coil of wire used in a transformer.
- C. The insulating material placed
- between the plates of an Inductor.
- D. The point at which an Inductor
- is tapped to produce resonance.
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- 3E 4.5 A
- What are the component parts of a coil?
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- A. The wire in the winding and the core material.
- B. The conductive plates and the insulating material.
- C. Two or more layers of silicon material.
- D. A donut shaped iron core and a layer of insulating tape.
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- 3E 5.1 B
- What is a CAPACITOR.
-
- A. An electronic component that stores
- energy in an 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.
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- 3E 5.2 A
- What factors determine the amount of capacitance in a Capacitor?
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- 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 material is N type or P type.
- D. The dielectric constant of the material between the plates,
- the area of one side of one plate, the number of plates
- and the type of material used for the protective coating.
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- 3E 5.3 D
- What are the electrical properties of a Capacitor?
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- 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.
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- 3E 5.4 D
- What is a Capacitor DIELECTRIC?
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- A. The insulating material used for the plates.
- B. The conducting material used between the plates.
- C. The Ferrite material that he plates are mounted on.
- D. The insulating material between the plates.
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- 3E 5.5 A
- What are the component parts of a Capacitor?
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- A. Two or more conducting 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.
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- 3E 7.1 A
- What is an OHM?
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- A. The basic unit of resistance.
- B. The basic unit of capacitance.
- C. The basic unit of inductance.
- D. The basic unit of admittance.
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- 3E 7.3 D
- What is the unit measurement of Resistance?
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- A. Volt.
- B. Ampere.
- C. Joule.
- D. Ohm.
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- 3E 8.1 A
- What is a MICROFARAD?
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- A. A basic unit of capacitance equal to 10^(-6)Farads.
- B. A basic unit of capacitance equal to 10^(-12) Farads.
- C. A basic unit of capacitance equal to 10^(-2) Farads.
- D. A basic unit of capacitance equal to 10^(+6) Farads.
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- 3E 8.2 B
- What is a PICOFARAD?
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- A. A basic unit of capacitance equal to 10^(-6) Farads.
- B. A basic unit of capacitance equal to 10^(-12) Farads.
- C. A basic unit of capacitance equal to 10^(-2) Farads.
- D. A basic unit of capacitance equal to 10^(+6) Farads.
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- 3E 8.3 B
- What is a FARAD?
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- A. A basic unit of resistance.
- B. A basic unit of capacitance.
- C. A basic unit of inductance.
- D. A basic unit of admittance.
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- 3E 8.4 A
- What is the basic unit of Capacitance?
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- A. Farad.
- B. Ohm.
- C. Volt.
- D. Ampere.
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- 3E 9.1 D
- What is a MICROHENRY?
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- A. A basic unit of inductance equal to 10^(-12) Henrys.
- B. A basic unit of inductance equal to 10^(-3) Henrys.
- C. A basic unit of inductance equal to 10^(+6) Henrys.
- D. A basic unit of inductance equal to 10^(-6) Henrys.
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- 3E 9.2 C
- What is a MILIHENRY?
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- A. A basic unit of inductance equal to 10^(-6) Henrys.
- B. A basic unit of inductance equal to 10^(-12) Henrys.
- C. A basic unit of inductance equal to 10^(-3) Henrys.
- D. A basic unit of inductance equal to 10^(+6) Henrys.
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- 3E 9.3 C
- What is a HENRY?
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- A. A basic unit of resistance.
- B. A basic unit of capacitance.
- C. A basic unit of inductance.
- D. A basic unit of admittance.
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- 3E 9.4 D
- What is the basic unit of Inductance?
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- A. Coulomb.
- B. Farad
- C. Ohm.
- D. Henry.
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- 3E 11.1 A
- How is the current in a DC circuit calculated
- when the voltage and resistance are known?
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- A. I = E / R.
- B. P = I x E.
- C. I = R x E.
- D. I = E x R.
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- 3E 11.2 C
- What is the input resistance of a load when a
- 12 volt battery supplies 0.25 amperes to it?
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- A. 0.02 ohms.
- B. 3 ohms.
- C. 48 ohms.
- D. 480 ohms.
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- 3E 11.3 D
- The product of the current and what force
- gives the electrical power in a circuit?
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- A. Magnetomotive force.
- B. Centripetal force.
- C. Electrochemical force.
- D. Electromotive force.
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- 3E 11.4 A
- What is OHM'S LAW?
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- A. A mathmatical relationship between resistance,
- current and applied voltage in a curcuit.
- B. A mathmatical relationship between current,
- resistance and power in a curcuit.
- C. A mathmatical relationship between current,
- voltage and power in a curcuit.
- D. A mathmatical relationship between resistance,
- voltage and power in a curcuit.
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- 3E 11.5 B
- What is the input resistance of a load when a
- 12 volt battery supplies 0.15 amperes to it?
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- A. 8 Ohms.
- B. 80 Ohms.
- C. 100 Ohms.
- D. 800 Ohms.
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- 3E 12.2 C
- In a series circuit composed of a voltage
- source and several Resistors, what determines
- the voltage drop across any particular Resistor?
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- A. It is equal to the source voltage.
- B. It is equal to the source voltage divided by the
- number of series Resistors in the circuit.
- C. The larger the Resistors value, the greater
- the voltage drop across that Resistor.
- D. The smaller the Resistors value, the greater
- the voltage drop across that Resistor.
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- 3E 13.4 B
- How is power calculated when the
- current and voltage in a circuit are known?
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- A. E = I x R.
- B. P = I x E.
- C. P = I^2 / R.
- D. P = E / I.
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- 3E 14.8 D
- When 120 Volts is measured across a 4700 Ohm Resistor,
- how much current is flowing through it?
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- A. 39 Amperes.
- B. 3.9 Amperes
- C. 0.26 Amperes.
- D. 0.026 Amperes
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- 3E 14.9 D
- When 120 Volts is measured across a 47000 Ohm Resistor,
- how much current is flowing through it?
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- A. 392 A.
- B. 39.2 A.
- C. 26 mA.
- D. 2.6 mA.
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- 3E 14.10 A
- When 12 Volts is measured across a 4700 Ohm Resistor,
- approximately how much current is flowing through it?
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- A. 2.6 mA.
- B. 26 mA.
- C. 39.3 A.
- D. 392 A.
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- 3E 14.11 A
- When 12 Volts is measured across a 4700 Ohm Resistor,
- approximately how much current is flowing through it?
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- A. 255 uA.
- B. 255 mA.
- C. 3917 mA.
- D. 3917 A.
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- End of Subelement 3AE.
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