2A652 Aerospace Ground Equipment CDC's (Vol 2)

64 Questions | Total Attempts: 723

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2A652 Aerospace Ground Equipment CDC

Aerospace Ground Equipment that deals with the Volume 2 material from the CDC's. Pretest for the AGE End of Course examination.


Questions and Answers
  • 1. 
    How many valence electrons are needed to make a good conductor?
    • A. 

      3

    • B. 

      4

    • C. 

      5

    • D. 

      6

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

      Free

    • B. 

      Stable

    • C. 

      Valence

    • D. 

      Ionized

  • 3. 
    "Dielectric" is the term used for
    • A. 

      Conductors

    • B. 

      Insulators

    • C. 

      Doped atoms

    • D. 

      Semi-conductors

  • 4. 
    "The flow or drift of electrons through a conductor" in the same direction at the same time is the definition of
    • A. 

      Conductivity

    • B. 

      Voltage

    • C. 

      Current

    • D. 

      Valence

  • 5. 
    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

  • 6. 
    What is used to control current flow in a circuit?
    • A. 

      Voltage

    • B. 

      Coulombs

    • C. 

      Resistance

    • D. 

      Conductivity

  • 7. 
    Given a voltage of 24 volts and a resistance of 18 ohms in a series circuit, the current through the resistor would be
    • A. 

      .075 amps

    • B. 

      1.33 amps

    • C. 

      133 amps

    • D. 

      750 amps

  • 8. 
    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 one component

    • D. 

      Reciprocal of the sum of the currents through each component

  • 9. 
    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

  • 10. 
    Source current in a parallel circuit will be divided according to branch
    • A. 

      Voltage

    • B. 

      Powers

    • C. 

      Lengths

    • D. 

      Resistances

  • 11. 
    What is the total resistance of a parallel circuit with branch voltages of 440 volt (v) and 440v and branch currents of 4 amp (a) and 16a?
    • A. 

      11 ohms

    • B. 

      22 ohms

    • C. 

      44 ohms

    • D. 

      68.75 ohms

  • 12. 
    • A. 

      Parallel portion of the circuit and divides according to component resistance in the series portion

    • B. 

      Series part of the circuit and divides according to branch resistance in the parallel portion

    • C. 

      Parallel portion of the circuit and increases according to component resistance in the series portion

    • D. 

      Series part of the circuit and increases according to component resistance in the parallel portion

  • 13. 
    What is the total current in a series-parallel circuit that has a total voltage or 48 volts (v), a series current of 6 amps (a), one branch current of 2a, and the other branch resistance of 3 ohms?
    • A. 

      3a

    • B. 

      6a

    • C. 

      8a

    • D. 

      12a

  • 14. 
    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

  • 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 through 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. 
    In a simple generator, which would be the most difficult method to increase the output?
    • A. 

      Increase the area of the conductor

    • B. 

      Increase the amount of motion

    • C. 

      Increase the strength of the magnetic field

    • D. 

      Increase the relative resistance

  • 19. 
    The principle behind all electromechanical generation is
    • A. 

      Conduction

    • B. 

      Commutation

    • C. 

      Rectification

    • D. 

      Electromagnetic induction

  • 20. 
    An inductor stores energy in the form of
    • A. 

      Heat

    • B. 

      Resistance

    • C. 

      A magnetic field

    • D. 

      An electrostatic field

  • 21. 
    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

  • 22. 
    A transformer will change all of the following except
    • A. 

      Power

    • B. 

      Current

    • C. 

      Voltage

    • D. 

      Resistance

  • 23. 
    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

  • 24. 
    A relay is an electrically operated
    • A. 

      Meter

    • B. 

      Motor

    • C. 

      Switch

    • D. 

      Safety device

  • 25. 
    A relay that, once energized, requires a second coil to be energized before the contacts will return to their original positions is called a
    • A. 

      Locking relay

    • B. 

      Latching relay

    • C. 

      Timing relay

    • D. 

      Tripping relay

  • 26. 
    A capacitor stores energy in the form of
    • A. 

      Heat

    • B. 

      Resistance

    • C. 

      A magnetic field

    • D. 

      An electrostatic field

  • 27. 
    In a capacitor, the dielectric is the
    • A. 

      Positive lead

    • B. 

      Conductor

    • C. 

      Insulator

    • D. 

      Outer case

  • 28. 
    Opposition of a capacitor to alternating current (AC) is called
    • A. 

      Inductive reactance

    • B. 

      Impedance

    • C. 

      Capacitive reactance

    • D. 

      Capacitance

  • 29. 
    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

  • 30. 
    Expanding or contracting the depletion region of a diode is called
    • A. 

      Basing

    • B. 

      Gating

    • C. 

      Spiking

    • D. 

      Biasing

  • 31. 
    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

  • 32. 
    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 been reached

    • D. 

      Until the breakdown point has been reached

  • 33. 
    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

  • 34. 
    A light emitting diode (LED) produces light when it is
    • A. 

      Gated

    • B. 

      Neutral

    • C. 

      Forward biased

    • D. 

      Revers biased

  • 35. 
    What is the approximate operating voltage of a light emitting diode (LED)?
    • A. 

      .5 volts

    • B. 

      .1 volts

    • C. 

      1.6 volts

    • D. 

      2.4 volts

  • 36. 
    The silicon controlled rectifier (SCR) has how many PN Junctions?
    • A. 

      One

    • B. 

      Two

    • C. 

      Three

    • D. 

      Four

  • 37. 
    A silicon controlled rectifier (SCR) is mainly used as
    • A. 

      A fuse

    • B. 

      Spike protection

    • C. 

      A circuit breaker

    • D. 

      An electronic switch

  • 38. 
    The control junction of a transistor is the
    • A. 

      Emitter-base junction

    • B. 

      Emitter-source junction

    • C. 

      Base-collector junction

    • D. 

      Emitter-collector junction

  • 39. 
    In normal operation, the emitter-base junction of a transistor is
    • A. 

      At balanced potential

    • B. 

      Forward biased

    • C. 

      Reverse biased

    • D. 

      At zero potential

  • 40. 
    The transistor circuit that provides the main path for current flow is the
    • A. 

      Emitter-base circuit

    • B. 

      Emitter-source circuit

    • C. 

      Base-collector circuit

    • D. 

      Emitter-collector circuit

  • 41. 
    The tab on the case of a unijunction transistor (UJT) indicates the
    • A. 

      Base lead

    • B. 

      Gate lead

    • C. 

      Emitter lead

    • D. 

      Collector lead

  • 42. 
    What determines the amount of potential required to forward bias a unijunction transistor (UJT)?
    • A. 

      Pinch-off voltage

    • B. 

      Voltage gradient

    • C. 

      Input impedance

    • D. 

      Intrinsic stand-off ratio

  • 43. 
    What component uses voltage to control the size of the current flow channel?
    • A. 

      UJT

    • B. 

      SCR

    • C. 

      LED

    • D. 

      FET

  • 44. 
    In a field-effect transistor (FET) symbol, the arrow always points to the
    • A. 

      P-type material

    • B. 

      N-type material

    • C. 

      P-N junction

    • D. 

      Positive voltage potential

  • 45. 
    Which semi-conductor device has a gate that is not electrically connected to the rest of the device?
    • A. 

      SCR

    • B. 

      JFET

    • C. 

      MOSFET

    • D. 

      UJT

  • 46. 
    Which type of field-effect transistor (FET) has no built-in connection between the source and drain?
    • A. 

      JFET

    • B. 

      IGFET

    • C. 

      Dual-gate MOSFET

    • D. 

      Induced channel MOSFET

  • 47. 
    A metal oxide varistor (MOV) is made up of how many semi-conductors
    • A. 

      2

    • B. 

      3

    • C. 

      4

    • D. 

      5

  • 48. 
    The best method of troubleshooting is the
    • A. 

      Systematic method

    • B. 

      Instantaneous method

    • C. 

      Hit-and-miss method

    • D. 

      Trial-and-error method

  • 49. 
    Which troubleshooting aid is designed to promote understanding of the system?
    • A. 

      Zones

    • B. 

      Schematic

    • C. 

      Wiring diagram

    • D. 

      Reference designation index

  • 50. 
    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

  • 51. 
    Which troubleshooting aid is designed to aid you in finding components on a diagram?
    • A. 

      Zones

    • B. 

      Schematic

    • C. 

      Wiring Diagram

    • D. 

      Reference designation index

  • 52. 
    The bar graph of the 8025A multimeter gives
    • A. 

      An analog reading

    • B. 

      A digital display

    • C. 

      The operating mode

    • D. 

      The range indication

  • 53. 
    When performing a continuity check on a wire using the diode test mode, a good wire will register
    • A. 

      OL

    • B. 

      Zero

    • C. 

      Infinity

    • D. 

      A beep

  • 54. 
    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

  • 55. 
    How many junctions are checked to test the serviceability of a transistor?
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 56. 
    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

  • 57. 
    A pitted or worn solderinig 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

  • 58. 
    Which procedure should you observe when working with electrostatic sensitive devices?
    • A. 

      Handle electrostatic sensing devices by their pins

    • B. 

      Remove jackets or sweaters near a electrostatic sensitive device

    • C. 

      Make sure sure all electrostatic sensitive devices are properly marked

    • D. 

      Ground the electrostatic sensitive device by sliding it across a plastic surface prior to use

  • 59. 
    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

  • 60. 
    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

  • 61. 
    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

  • 62. 
    A good solder cup connection shows the
    • A. 

      Insulation

    • B. 

      Solder flux

    • C. 

      Wire number

    • D. 

      Contour of the wire

  • 63. 
    The best method of repairing a lifted circuit track on a printed circuit board (PCB) is to
    • A. 

      Bond it

    • B. 

      Glue it

    • C. 

      Replace it with bare wire

    • D. 

      Replace it with insulated wire

  • 64. 
    A major cause of shorts on printed circuit boards (PCB) is
    • A. 

      Lifted circuit tracks

    • B. 

      Careless soldering

    • C. 

      Static electricity

    • D. 

      Cracked circuit tracks