2 CDC's

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2 CDC's
2013-06-06 09:01:04

study eoc
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  1. Screwdrivers are sized by the length of the?
  2. A properly ground tip on a standard screwdriver?
    Is square and flat
  3. One of the most important things to remember when using a hammer or any other hand tool is to use a?
    Tool only for its correct purpose
  4. What kind of pliers are mainly for holding or bending flat or round stock?
    Combination slip-joint.
  5. One advantage of box-end wrenches is that they?
    Are not likely to slip off a nut
  6. Thickness gauges of various sizes are normally used to measure the?
    Clearance between two objects
  7. Before storing a torque wrench you have used, you should?
    Set it at its lowest setting
  8. Tubing used in aircraft oxygen, fuel, lubrication, fire extinguishing, instruments, hydraulic, and vent lines is?
    Aluminum alloy and stainless steel
  9. You can identify a fitting that has pipe threads by its?
  10. When torquing a bolt assembly, what is the force applied to overcome friction?
  11. When installing a cotter pin, ensure the prong that bends over the bolt shank does not exceed the bolt nut?
  12. A good rule to follow in using safety wire is?
    Loop it so that it opposes the loosening of the part
  13. Wire insulation may consist of several layers of nonconducting material that provides?
    Thermal protection and fluid resistance
  14. Which technical order (TO) provides instructions for the Brady Wire Marking System?
  15. Wires and wire bundles should be supported by clamps or grommets at intervals of no more than?
    24 inches
  16. All wire groups or bundles must be tied when supports are more than?
    12 inches apart.
  17. Avoid using self-clinching tie straps where temperatures exceed?
    185 F
  18. How many nicked or broken wire strands are allowed on 16-gauge aluminum wire?
  19. The indent-type crimping tool should be used only on?
    non-insulated terminals.
  20. What do you use as junction points for circuits that are frequently disconnected?
    Connector plugs.
  21. What ensures a connector plug and receptacle are not mismated?
    Key-and-key way arrangement.
  22. When heat is applied to thermofit material, which is used in compact wire bundles, it will shrink by at least?
    one-half its original diameter.
  23. The electrical magnetic pulse (EMP)-hardened cable provides a barrier to?
    electrostatic interference.
  24. After a bonding or grounding jumper is installed, it should read no more than?
    0.1 ohms.
  25. Which type of solder is preferred for printed circuit boards?
  26. Oxide film is removed from the surface of metals during the soldering process by the use of?
    the soldering flux
  27. In order to shape a soldering iron’s copper tip, use a?
    fine file while the tip is cold.
  28. In order to clean a plated soldering tip, use?
    an abrasive cloth while the tip is cold
  29. Prior to soldering electronic equipment, ensure the equipment is?
    disconnected from the power source
  30. How should you test the heat of a soldering iron?
    Touch the tip to the solder, away from your body.
  31. The minimum insulation clearance is how many times the wire diameter?
  32. An acceptable tinned wire has?
    an insulation clearance equal to the diameter of the wire and wire strands covered with solder, but still visible.
  33. After soldering, remove traces of flux with a?
    medium-stiff brush and approved solvent
  34. Which choice best describes a good solder connection?
    No pits or holes and has a good concave fillet
  35. When making wire connections to turret terminals, wrap the wire around the terminal at least?
    180 F
  36. Prior to soldering a turret terminal what must you do?
    Wrap the wire around the terminal at least 180°, but no more than 270°.
  37. After soldering a connection, what is your next step?
    Clean the connection and inspect it for defects.
  38. You prepped the wire and are ready to solder a cup terminal. What is your next step?
    Melt a small amount of solder inside the terminal
  39. How many British thermal units (BTU) does it take to raise the temperature of 5 pounds of water 5 Fahrenheit (F)?
  40. What happens when gas is trapped in a cylinder and pressure is applied to the piston, while the temperature remains constant?
    Volume will decrease.
  41. When a gas is heated, its pressure will?
  42. A permanent magnet
    keeps its magnetism
  43. The greater the current flow through an electromagnet, the?
    greater the field strength.
  44. The intensity of electrical current flow is measured in?
  45. What is the symbol for Ohms?
    omega symbol
  46. The basic function of electricity is to?
    transfer energy
  47. According to Kirchhoff’s voltage law, in a closed circuit, the applied voltage is equal to the
    sum of the voltage drops around the circuit.
  48. Applied voltage in a parallel circuit is 12 volts, and there are two parallel branches with one 6-ohm resistor in each branch. The voltage drop across each resistor is?
    12 volts.
  49. The total resistance in a parallel circuit is always
    less than the smallest resistance in the circuit
  50. To find the total resistance in a series-parallel circuit, you must
    add the total resistance of the parallel part to the total resistance of the series part.
  51. The rule that indicates the direction a current-carrying conductor will move in a magnetic field is the
    right-hand rule for motors
  52. The effective electromotive force (EMF) in a motor is made up of
    applied voltage minus CEMF
  53. A positive peak is reached at what position?
    90 F
  54. The phase angle of an alternating current (AC) sine wave is measured in
  55. Alternating current (AC) generators operate on the principle of
  56. To compute capacitance, you must know the
    plate area, distance between the plates, and type of dielectric
  57. One disadvantage of the electrolytic capacitor is that
    it has a high-power loss.
  58. Transformers in low-frequency circuits require a
    core of low-reluctance magnetic material
  59. The extent to which the primary’s magnetic lines cut across the secondary is expressed as
    coefficient of coupling
  60. What process transfers electrical energy from the primary to the secondary winding of a transformer?
    Mutual induction
  61. The current in a two-phase induction motor is
    90 F out-of-phase
  62. The difference between the speed of the stator’s rotating magnetic field and the rotor is called
  63. What controls the flow of the current carriers in a transistor?
  64. Which is a true statement concerning normal operation of transistors?
    Collector-base junctions are reversed biased.
  65. What half-wave rectifier component limits the peak current?
    Surge resistor.
  66. The full-wave rectifier is used in
    low-voltage and high-voltage circuits
  67. When an electronic voltage regulator’s input voltage first increases,
    series transistor bias decreases.
  68. What do most logic circuits use to define the input or output condition?
    Voltage polarity
  69. To obtain a high output, the inputs to an AND gate must be
  70. Which logic gate has a high output when all inputs are low?
  71. Which unit is used as a circuit-controlling device?
  72. If you’re troubleshooting a parallel circuit with one leg or branch open, what kind of amperage reading does an ammeter connected in series with the whole circuit display?
  73. What reading would the ohmmeter display for a shorted component in a series-parallel circuit?
    Lower than normal or zero.
  74. The voltmeter indicates voltage, but it actually measures
    electron potential
  75. Load lights can be effective for locating problems with
    high resistance
  76. The typical multimeter is a combination voltmeter
    ohmmeter, and ammeter.
  77. When measuring resistance with the Fluke multimeter, what do the letters OL on the display indicate?
  78. What are the four range settings on the Fluke multimeter?
    6, 60, 600, 1000
  79. In using a voltmeter to check a circuit for an “open” in a direct current (DC) circuit, you must
    observe polarities in the circuit
  80. If a circuit has two equal resistors connected in series, a voltmeter connected across an open resistor will read
    the difference in potential.
  81. You would troubleshoot a 28-volts direct current (VDC) circuit for a blown fuse (short) with
    an ohmmeter.
  82. How do you check for a shorted relay in a parallel circuit?
    Isolate the component.
  83. What is the minimum personal protective equipment (PPE) you are required to wear when performing routine sealed lead-acid batteries (SLAB) maintenance?
    Face shield and rubber gloves
  84. The neutralizing agent for sulfuric acid is
    bicarbonate of soda.
  85. If nickel-cadmium (Ni-Cad) electrolyte is spilled, what kind of solution will help neutralize the electrolyte?
    Boric acid.
  86. How many cells does a 24-volt, lead-acid battery have?
  87. If a battery discharged at 2 amperes for 12 hours, it would furnish how many ampere-hours?
  88. If the vent plug on a nickel-cadmium (Ni-Cad) battery cell opens to relieve pressure, then the pounds per square inch (psi) is between
    2–10 psi
  89. If checking the electrolyte level in a nickel-cadmium (Ni-Cad) battery, then you would use which of the following?
    Glass tube.
  90. If you need to adjust a nickel-cadmium (Ni-Cad) battery’s electrolyte level, then which of the following would you use?
    Polythylene wash bottle.
  91. What technical order (TO) covers the RF80-K Charger/Analyzer?
  92. After a sealed lead acid battery comes into the shop, what Air Force technical order (AFTO) or Department of Defense (DD) form is used to record servicing?
    AFTO Form 161.
  93. If a sealed lead acid battery is found to be leaking during maintenance, then the first thing to be done is
    terminate the maintenance
  94. Above what minimum volts direct current (VDC) is the sealed lead-acid battery (SLAB) designed to vent pressure?
    31.5 VDC.
  95. After the first hour a nickel-cadmium (Ni-Cad) battery is under test, how often should you monitor the individual cells?
    15-minute intervals.
  96. Which method is used to charge nickel-cadmium (Ni-Cad) batteries?
    Reflex charge or constant current
  97. Pitting corrosion of aluminum or magnesium alloy first appears as
    white powdery deposit on the metal surface
  98. Which corrosion type lifts up the metal surfaces?
  99. All metal components of your systems should get a comprehensive inspection for corrosion
    during all inspections.
  100. All of these areas are prone to corrosion, except
    flat, coated surfaces.