Volume 2 cont.

Card Set Information

Volume 2 cont.
2010-12-05 11:56:18
CDC Electrical Environmental Volume

CDC Electrical Environmental
Show Answers:

  1. During soldering, apply the proper amount of solder directly to the
  2. How should you remove a component from a printed circuit board?
    Vacuum Desoldering
  3. Which choice best describes a good solder connection?
    No pits or holes and has a good concave fillet.
  4. When making wire connections to turret terminals, wrap the wire around the terminal at least
    180 degrees
  5. To connect wires or compnent leads to flat perforated terminals, the wrap must be
    180 degrees
  6. What is the heaviest duty solding iron you normally use in soldering a printed circuit board?
    27 watts
  7. You should clean the circuit board connection within how long after it has cooled?
    90 minutes
  8. How should a clinched-lead terminal lay in respect to the printed circuit pad?
    Flat on the pad and in the direction of the printed circuit wiring pattern.
  9. How should you hold a printed circuit board to desolder a component?
  10. What must you do before soldering gold-plated integrated circuit leads?
    Remove their gold plating
  11. To clean tinned, lead-plated circuit boards use
    a medium-bristle brush and alcohol
  12. When soldering a module-type package to a printed circuit board, ensure the connection is soldered within
    5 seconds
  13. You must repair a circuit board condutor if it has a knick that extends what part of it's width?
    25 percent
  14. What angle is used to trim out damaged foil areas of printed circuit boards?
    45 degrees
  15. When repairing a damaged terminal on a circuit board, the replacement foil should overlap the connecting circuit conductor by at least
    0.125 inches
  16. What is an acceptable substitue for silver solder flux?
    Borax and Water
  17. When soldering a brass fitting to copper tubing, how far should the inner cone of the torch flame be kept from the work?
    At least on-half of an inch
  18. How many BTUs does it take to raise the temperature of 5lbs. of water 5 degrees Farenheight?
  19. If an aircraft temp. indicator shows 40 degrees C, what is the equivalent Farenheit temp?
    104 degrees
  20. What happens when gas is trapped in a cylinder and pressure is applied to the piston?
    Volume will decrease
  21. When a gas is heated, its pressure will
  22. What is a true statement concerning a permanent magnet?
    It keeps it's magnetism
  23. Which of the following is a good insulator?
  24. The intensity of electrical current flow is measured in
  25. What is the total current in a series that has a applied voltage of 24volts and a total resistance of 8ohms?
    3 amperes
  26. The basic function of electricity is to
    transfer energey
  27. In a series circuit, when 24 volts is applied and total resistance is 6 ohms, what is the amperage?
    4 amps
  28. The total resistance is a parrallel circuit is always
    less than the smallest resistance in the circuit
  29. The rule that indicates the direction a current-carrying conductor will move in a magnetic field is the
    Right-hand rule for motors
  30. What is the effective electromotive force (EMF) in a motor?
    The applied voltage minus CEMF
  31. In a circuit with both coils and capacitors, voltage and current will be
    out of phase
  32. AC generators operate on the principle of
  33. One disadvantage of the electrolytic capacitor is that
    it has a high-power loss
  34. Transformers in low-frequency circuits require a
    core of low-reluctance magnetic material
  35. The extent to which the primary's magnetic lines cut across the secondary is expressed as
    coefficient of coupling
  36. AC power is connected directly to what part of an induction motor?
  37. The current in a two-phase induction motor is
    90 degrees out of phase
  38. The difference between the speed of the stator's rotating magnetic field and the rotor is called
  39. Which of the following is a true statement concerning normal operation of a transistor?
    The collector-base junction is reverse biased
  40. How does the movement of majority carriers in a PNP transistor compare with that in an NPN?
    They move from emitter to collector in both types
  41. What is the difference between the PNP and NPN transistor symbols?
    The direction of the arrow on the emitter lead
  42. Which transistor amplifier configurations have their signal voltages in phase?
    Common base and common collector
  43. What half-wave rectifier component limits the peak current?
  44. The full-wave rectifier is used in
    low-voltage and high-voltage circuits
  45. In an electronic voltage regulator, the series transistor acts like a
    variable resistor
  46. What do most logic circuits use to define the input or output condidtion?
    Voltage polarity
  47. To obtain a high output, the inputs to an AND gate must be
  48. Which logic gate has a high output when all inputs are low?
  49. What unit is used as a circuit-controlling device?
  50. If you're troubleshooting a parallel circuit with one leg open, an ammeter connected in series with the whole circuit gives what kind of amperage reading?
  51. What would the ohmmeter read for a shorted component in a seres-parallel circuit?
    Lower than normal or zero
  52. The voltmeter indicates voltage, but it actually measures
  53. In measuring an unknown voltage with a voltmeter, what range should you use first?
    highest meter range
  54. If your ohmmeter won't adjust to zero when you're ready to use it, you should
    change the battery
  55. An ohmmeter indicated an open circuit when it reads
  56. How do you connect an ammeter in a circuit?
  57. The AN/USM-33 multimeter uses crystal diodes to change
    AC voltage to DC current
  58. Before taking the first current measurement, you shoul set the range select swith on the
    0 to 600 range
  59. The AN/PSM-33 multimeter indicator has how many range scales?
  60. What should you do to change the AN/PSM-37 meter's range or functin switch without removing the test leads from the circuit?
    Push in the push-to-open-and-reset control
  61. To measure circuit current, you connect an AN/PSM-37 multimeter in
    series in the circuit
  62. Use the range button on the Fluke multimeter to
    move the decimal point
  63. On the Fluke multlimeter, what does it mean when the H symbol is shown on the meter display?
    Touch-hold mode is in use
  64. When measuring resistance with the Fluke multimeter, what does the letters OL on the display indicate?
  65. The thermoswith tester can check switches with a farneheit range or
    200 to 1000 degrees
  66. When do you turn the anti skid tester Power switch on?
    Just after you turn on the aircraft power
  67. What is the maximum current output of the igniter circuit tester?
    5.5 milliamperes
  68. You should perform an preoperational check of the igniter circuit tester at least
    prior to each day's use
  69. What does each unit in the test stand incorporate for safety during maintenance?
    Power disconnect switch
  70. What must be done to apply a reactive load to a generator under test?
    Load a power factor
  71. If a circuit has two equal resistors connected in series, a voltmeter connected across an open resistor will read
    applied voltage
  72. You would troubleshoot a 28VDC circuit for a blown fuse (short) with a/an
  73. In checking for a shorted relay in a parallel circuit, you must
    isolate the component
  74. Which of the following statements is true concerning ni-cad batteries and lead-acid batteries?
    They must be stored and charged in seperate areas
  75. The greatest hazard in working around a lead-acid battery is
    sulfuric acid
  76. The neutralizing agent for sulfuric acid is
    bicarbonate of soda
  77. Lead-acid batteries and Ni-cad batteries are stored and charged in seperate areas because accidentally mixing the electrolytes could
    neutralize the electrolytes, causing excessive heat, and the battery might explode
  78. How many cells does a 24V lead-acid battery have?
  79. The number of cells in a normal Ni-cad battery for a 24V aircraft system is
  80. A ni-cad battery's seperators are made of nylon and cellophane or
  81. A fully charged battery should have a specific gravity reading of
    1.275 to 1.300
  82. What do you use to adjust a lead-acid battery's electrolyte level?
    self-leveling syringe
  83. Constant-Current charging keeps the current at a value that is predetermined by the
  84. In an equalized NI-Cad battery, each cell's voltage is
    0 volts
  85. Pitting corrosion of aluminum or magnesium alloy first appears as
    white powdery deposit on the metal surface
  86. All metal components of your systems should get a comprehensive inspection for corrosion
    during all inspections