CDC 2A652 Vol. 2

60 Questions | Total Attempts: 2840

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2a652 Quizzes & Trivia

Aerospace Ground Equipment Journeyman Electrical and Electrical Circuits and Components. Edit Code 05.


Questions and Answers
  • 1. 
    Every atom must contain what types of particles?
    • A. 

      Electrons and protons.

    • B. 

      Electrons and neutrons.

    • C. 

      Protons and neutrons.

    • D. 

      Electrons, protons, and neutrons.

  • 2. 
    An atom with eight electrons in its outermost shell is said to be
    • A. 

      Free.

    • B. 

      Stable.

    • C. 

      Valence.

    • D. 

      Ionized.

  • 3. 
    How many valence electrons are needed to make a good conductor?
    • A. 

      3.

    • B. 

      4.

    • C. 

      5.

    • D. 

      6.

  • 4. 
    "Dielectric" is the term used for
    • A. 

      Conductors.

    • B. 

      Insulators.

    • C. 

      Doped atoms.

    • D. 

      Semi-conductors.

  • 5. 
    "The flow or drift of electrons through a conductor" in the same direction at the same time is
    • A. 

      Conductivity.

    • B. 

      Voltage.

    • C. 

      Current.

    • D. 

      Valence.

  • 6. 
    The potential difference between two points in a circuit that exerts a force on free electrons is called
    • A. 

      Conductivity.

    • B. 

      Voltage.

    • C. 

      Current.

    • D. 

      Valence.

  • 7. 
    What is used to control current flow in a circuit?
    • A. 

      Voltage.

    • B. 

      Coulombs.

    • C. 

      Resistance.

    • D. 

      Conductivity.

  • 8. 
    The relationship of voltage, current, and resistance is expressed through
    • A. 

      E, I, and C.

    • B. 

      Power formulas.

    • C. 

      Conductance.

    • D. 

      Ohm's Law.

  • 9. 
    Total current in a series circuit is equal to the
    • A. 

      Current through one component.

    • B. 

      Sum of the current through each component.

    • C. 

      Reciprocal of the current through on component.

    • D. 

      Reciprocal of the sum of the currents through each component.

  • 10. 
    What is the wattage of a circuit with 28 volts applied and a total resistance of .2 ohms?
    • A. 

      .14 watts (w)

    • B. 

      .14 kilowatts (kw)

    • C. 

      3.92 w.

    • D. 

      3.92 kw.

  • 11. 
    In a parallel circuit, the total voltage is equal to the
    • A. 

      Sum of the voltages across each branch.

    • B. 

      Voltage across each resistor.

    • C. 

      Voltage across each branch.

    • D. 

      The reciprocal of the voltage across the resistances.

  • 12. 
    Source current in a parallel circuit will be divided according to branch
    • A. 

      Voltage.

    • B. 

      Powers.

    • C. 

      Lengths.

    • D. 

      Resistances.

  • 13. 
    The area around a magnet where its influence can be felt is the definition of the
    • A. 

      Saturation principle.

    • B. 

      Magnetic theory.

    • C. 

      Magnetic field.

    • D. 

      Law of attraction and repulsion.

  • 14. 
    "The ability of a material to pass lines of force" is a definition of
    • A. 

      Permeability.

    • B. 

      Reluctance.

    • C. 

      Electromagnetism.

    • D. 

      Retentivity.

  • 15. 
    The magnetism that remains after the magnetizing force has been removed is known as
    • A. 

      Electromagnetism.

    • B. 

      Molecular magnetism.

    • C. 

      Permeability.

    • D. 

      Residual magnetism.

  • 16. 
    The magnetic field of an electromagnet can be varied by changing the
    • A. 

      Type of core.

    • B. 

      Number of turns in the coil.

    • C. 

      Amount of current in the coil.

    • D. 

      All of the above.

  • 17. 
    The electromechanical generation of a voltage requires a magnetic field, relative motion, and
    • A. 

      A complete circuit.

    • B. 

      A conductor.

    • C. 

      An insulator.

    • D. 

      A load.

  • 18. 
    The principle behind all electromechanical generation is
    • A. 

      Conduction.

    • B. 

      Commutation.

    • C. 

      Rectification.

    • D. 

      Electromagnetic induction.

  • 19. 
    The function of the commutator in a DC generator is to
    • A. 

      Complete the circuit to the load.

    • B. 

      Induce DC into the external circuit.

    • C. 

      Rectify the input.

    • D. 

      Change AC voltage to DC voltage.

  • 20. 
    Because an inductor stores energy and then returns it to the circuit, it is called a
    • A. 

      Resistive device.

    • B. 

      Reactive device.

    • C. 

      Retentive device.

    • D. 

      Retroactive device.

  • 21. 
    An inductor stores energy in the form of
    • A. 

      Heat.

    • B. 

      Resistance.

    • C. 

      A magnetic field.

    • D. 

      An electrostatic field.

  • 22. 
    The process by which a current change in one coil produces a voltage in another coil is called
    • A. 

      Inductance.

    • B. 

      Self-induction.

    • C. 

      Mutual induction.

    • D. 

      None of the above.

  • 23. 
    A transformer will change all of the following except
    • A. 

      Power.

    • B. 

      Current.

    • C. 

      Voltage.

    • D. 

      Resistance.

  • 24. 
    Normally, the winding of a transformer that is connected to a power source is known as the 
    • A. 

      Field winding.

    • B. 

      Primary winding.

    • C. 

      Current winding.

    • D. 

      Secondary winding.

  • 25. 
    What kind of turns of wire is found in the secondary windings of a step up transformer?
    • A. 

      Equal.

    • B. 

      Less.

    • C. 

      More.

    • D. 

      All of the above.

  • 26. 
    A relay is an electrically operated
    • A. 

      Meter.

    • B. 

      Motor.

    • C. 

      Switch.

    • D. 

      Safety device.

  • 27. 
    A relay that, once energized, requires a second coil to be energized before the contacts will return to their original positions is called
    • A. 

      Locking relay.

    • B. 

      Latching relay.

    • C. 

      Timing relay.

    • D. 

      Tripping relay.

  • 28. 
    A capacitor stores energy in the form of
    • A. 

      Heat.

    • B. 

      Resistance.

    • C. 

      A magnetic field.

    • D. 

      An electrostatic field.

  • 29. 
    In a capacitor, the dielectric is the
    • A. 

      Positive lead.

    • B. 

      Conductor.

    • C. 

      Insulator.

    • D. 

      Outer case.

  • 30. 
    Opposition of a capacitor to AC is called
    • A. 

      Inductive reactance.

    • B. 

      Impedance.

    • C. 

      Capacitive reactance.

    • D. 

      Capacitance.

  • 31. 
    The factors which determine the time required to charge a capacitor are the capacitance and the
    • A. 

      Applied voltage.

    • B. 

      Circuit current.

    • C. 

      Amount of resistance.

    • D. 

      Type of dielectric.

  • 32. 
    The anode of a diode is constructed of
    • A. 

      Neutral material.

    • B. 

      Biased material.

    • C. 

      Positive material.

    • D. 

      Negative material.

  • 33. 
    Expanding or contracting the depletion region of a diode is called
    • A. 

      Basing.

    • B. 

      Gating.

    • C. 

      Spiking.

    • D. 

      Biasing.

  • 34. 
    A diode placed in a circuit in reverse bias is being used as
    • A. 

      A spike protector.

    • B. 

      An amplifier.

    • C. 

      A regulator.

    • D. 

      A rectifier.

  • 35. 
    A zener will conduct in reverse bias
    • A. 

      For a second or two at a time.

    • B. 

      Until gate potential has been reached.

    • C. 

      Once the avalanche point has bene reached.

    • D. 

      Until the breakdown point has been reached.

  • 36. 
    A zener being used as a regulator must have a resistor placed in the circuit in
    • A. 

      Series.

    • B. 

      Parallel.

    • C. 

      Reverse bias.

    • D. 

      Series-parallel.

  • 37. 
    What is the approximate operating voltage of a LED?
    • A. 

      .5 volts.

    • B. 

      .1 volt.

    • C. 

      1.6 volts.

    • D. 

      2.4 volts.

  • 38. 
    The SCR has how many PN junctions?
    • A. 

      One.

    • B. 

      Two.

    • C. 

      Three.

    • D. 

      Four.

  • 39. 
    The amount of current required to gate an SCR is called
    • A. 

      Forward breakover voltage.

    • B. 

      Holding current.

    • C. 

      Peak voltage.

    • D. 

      Gate current.

  • 40. 
    In order for an SCR to be turned off
    • A. 

      The forward breakover voltage must exceed the holding voltage.

    • B. 

      The current must drop below the holding current.

    • C. 

      The negative amp switch must activate.

    • D. 

      The negative volt switch must activate.

  • 41. 
    The best method of troubleshooting is the
    • A. 

      Systematic method.

    • B. 

      Instantaneous method.

    • C. 

      Hit-and-miss method.

    • D. 

      Trial-and-error method.

  • 42. 
    Which troubleshooting step is done by knowing proper equipment operation?
    • A. 

      Analysis.

    • B. 

      Recognition.

    • C. 

      Repair and check.

    • D. 

      Elimination and isolation.

  • 43. 
    During which troubleshooting step do you try to determine which system could cause the malfunction?
    • A. 

      Analysis.

    • B. 

      Verification.

    • C. 

      Recognition.

    • D. 

      Elimination and isolation.

  • 44. 
    During which troubleshooting step do your first use the schematic diagram?
    • A. 

      Recognition.

    • B. 

      Verification.

    • C. 

      Analysis.

    • D. 

      Isolation.

  • 45. 
    Which troubleshooting aid is designed to aid you if you see an unfamiliar symbol?
    • A. 

      Zones.

    • B. 

      Schematic.

    • C. 

      Wiring diagram.

    • D. 

      Reference designation index.

  • 46. 
    Which troubleshooting aid is designed to aid you in finding components in a diagram?
    • A. 

      Zones.

    • B. 

      Schematic.

    • C. 

      Wiring diagram.

    • D. 

      Reference designation index.

  • 47. 
    When used in a series circuit to measure voltage, how is a multimeter connected in the circuit?
    • A. 

      In series.

    • B. 

      To ground.

    • C. 

      In parallel.

    • D. 

      In series-parallel.

  • 48. 
    To set a value to the height of the oscilloscope grid markings, you adjust the
    • A. 

      Focus.

    • B. 

      Pitch control.

    • C. 

      Voltage selector.

    • D. 

      Time sweep selector.

  • 49. 
    To ensure accuracy of an oscilloscope when preparing for operation you should always,
    • A. 

      Zero the display.

    • B. 

      Center the display.

    • C. 

      Identify the cal point and adjust to zero.

    • D. 

      Identify the cal point and calibrate the display.

  • 50. 
    When you are testing a transformer, an open coil reading on the 8025A multimeter will be indicated by
    • A. 

      A beep.

    • B. 

      An extending analog bar graph.

    • C. 

      OL.

    • D. 

      0 ohms.

  • 51. 
    Which could be the indication from the 8025A multimeter when you are checking a serviceable capacitor?
    • A. 

      A beep.

    • B. 

      An extending analog bar graph.

    • C. 

      OL.

    • D. 

      0 ohms.

  • 52. 
    How many junctions are checked to test the serviceability of a transistor?
    • A. 

      1.

    • B. 

      2.

    • C. 

      3.

    • D. 

      4.

  • 53. 
    When checking a FET, you must check the diode junction and the continuity between the
    • A. 

      Gate and source.

    • B. 

      Source and drain.

    • C. 

      Gate and substrate.

    • D. 

      Substrate and drain.

  • 54. 
    How can you identify an electrostatic sensitive device?
    • A. 

      The package will have special coloring as specified in local directives.

    • B. 

      The package will have a special control number as specified in local directives.

    • C. 

      It will be marked with the MIL-STD-129 symbol or a caution marking.

    • D. 

      It will be marked with the MIL-SPC-235 symbol or a warning marking.

  • 55. 
    A heat sink is used in soldering to
    • A. 

      Prevent heat from damaging the component being soldered.

    • B. 

      Prevent heat from damaging other components in the circuit.

    • C. 

      Apply heat to the component being soldered.

    • D. 

      Apply heat to other components in the circuit.

  • 56. 
    A pitted or worn soldering iron tip should be redressed with a flat, fine, single-cut file and should be
    • A. 

      Tinned.

    • B. 

      Clean of solder.

    • C. 

      Replaced.

    • D. 

      Checked for length.

  • 57. 
    The first step in soldering a conductor is to
    • A. 

      Wick the wire.

    • B. 

      Removed the insulation.

    • C. 

      Apply heat to the connection.

    • D. 

      Apply solder to the connection.

  • 58. 
    When soldering flat perforated terminals, the conductor is connected to the terminal using a
    • A. 

      90 degree wrap.

    • B. 

      180 degree wrap.

    • C. 

      270 degree wrap.

    • D. 

      360 degree wrap.

  • 59. 
    A wire is inserted into a solder cup until the
    • A. 

      Wire touches the bottom.

    • B. 

      Wire clears the top of the cup.

    • C. 

      Insulation touches the cup.

    • D. 

      Wire protrudes from the weep hole.

  • 60. 
    The best method of repairing a lifted circuit track on a PCB is to
    • A. 

      Bond it.

    • B. 

      Glue it.

    • C. 

      Replace it with bare wire.

    • D. 

      Replace it with insulated wire.