Airframe Part 3

Card Set Information

Airframe Part 3
2011-09-05 21:22:36

Welding, Assembly and Rigging
Show Answers:

  1. The auxiliary (tail) rotor of a helicopter permits the pilot to compensate for and/or accomplish which of the following?
    Torque and Directional Control
  2. The vertical flight of a helicopter is controlled by
    Collective pitch changes
  3. A decrease in pitch angle of the tail rotor blades on a helicopter
    causes the tail to pivot in the direction of torque rotation around the main rotor axis.
  4. In rotorcraft external-loading, the ideal location of the cargo release is where the line of action passes
    through the center of gravity at all times.
  5. The acute angle formed by the chord line of a wing and the relative wind is known as the
    Angle of attack
  6. A helicopter in forward flight, cruise configuration, changes direction by
    tilting the main rotor disk in the desired direction.
  7. The purpose in checking main rotor blade tracking is to determine the
    relative position of the blades during rotation.
  8. In a hovering helicopter equipped with a tail rotor, directional control is maintained by
    varying the pitch of the tail rotor blades
  9. If a single-rotor helicopter is in forward horizontal flight, the angle of attack of the advancing blade is
    less than the retreating blades
  10. Main rotor blades that do not cone by the same amount during rotation are said to be out of
  11. One purpose of the freewheeling unit required between the engine and the helicopter transmission is to
    Automatically disengage the rotor from the engine in case of an engine failure.
  12. Which statement is correct concerning torque effect on helicopters?
    Torque direction is the opposite of rotor blade direction
  13. What is the purpose of the free-wheeling unit in a helicopter drive system?
    It disconnects the rotor whenever the engine stops or slows below the equivalent or rotor rpm.
  14. Movement about the longitudinal axis (roll) in a helicopter is effected by movement of the
    Cylic Pitch Control
  15. Movement about the lateral axis (pitch) in a helicopter is effected by movement of the
    Cylic Pitch Control
  16. Wing dihedral, a rigging consideration on most airplanes of conventional design, contributes most to stability of the airplane about its
    Longitudinal Axis
  17. Other than the manufacturer maintenance manual what other document could be used to determine the primary flight control surface deflection for an imported aircraft that is reassembled after shipment?
    Aircraft Type Certificate Data Sheet
  18. If a pilot reports that an airplane flies left wing heavy, this condition may be corrected by
    increasing the angle of incidence of the left wing, or decreasing the angle of incidence of the right wing, or both.
  19. If the vertical fin of a single-engine, propeller-driven airplane is rigged properly, it will generally be parallel to
    the vertical axis but not the longitudinal axis
  20. An airplane which has good longitudinal stability should have a minimum tendency to
  21. As the angle of attack of an airfoil increases, the center of pressure will
    Move toward the leading edge
  22. The angle of incidence is that acute angle formed by
    a line parallel to the wing chord and a line parallel to the longitudinal axis of the aircraft.
  23. An airplane's center of lift is usually located aft of its center of gravity
    so that the airplane will have a nose-heavy tendency.
  24. An airplane is controlled directionally about its vertical axis by the
  25. The elevators of a conventional airplane are used to provide rotation about the
    Lateral Axis
  26. Washing-in the left wing of a monoplane, for purposes of rigging corrections after flight test, will have what effect on the lift and drag of that wing?
    Both drag and lift will increase due to an increase in angle of attack
  27. What type of flap system increases the wing area and changes the wing camber?
    Fowler Flaps
  28. If the right wing of a monoplane is improperly rigged to a greater angle of incidence than designated in the manufacturer's specifications, it will cause the
    airplace to be off balance both laterally and directionally.
  29. The chord of a wing is measured from
    Leading Edge to Trailing Edge
  30. When the lift of an airfoil increases, the drag will
    Also increase
  31. What physical factors are involved in the aspect ratio of airplane wings?
    Span and Chord
  32. Improper rigging of the elevator trim tab system will affect the balance of the airplane about its
    Lateral Axis
  33. An airplane that has a tendency to gradually increase a pitching moment that has been set into motion has
    poor longitudinal stability
  34. The purpose of wing slats is to
    reduce stalling speed
  35. The angle of incidence of an airplane at rest
    does not change when in flight
  36. Buffeting is the intermittent application of forces to a part of an airplane. It is caused by
    an unsteady flow from turbulence
  37. Movement of an airplane along its lateral axis (roll) is also movement
    around or about the longitudinal axis controlled by the ailerons
  38. The primary purpose of stall strips is to
    stall the inbound portion of the wings first
  39. Rigging and alignment checks should not be undertaken in the open; however, if this cannot be avoided, the aircraft should be positioned
    with the nose into the wind
  40. The correct dihedral angle can be determined by
    using a dihedral board and bubble level along the front spar of each wing.
  41. The dihedral angle of a wing may be measured by placing a straightedge and level protractor on the
    Front Spar
  42. Where would you find precise information to perform a symmetry alignment check for a particular aircraft?
    Aircraft Service or Maintenance Manual
  43. Where is the buttock line or buttline of an aircraft?
    A width measurement left or right of, parallel to the veritical centerline.
  44. Where is fuselage station No. 137 located?
    137 inches aft of the zero or fixed reference line
  45. Proper wing twist in a sheet metal constructed wing can usually be checked by utilizing a
    bubble level and special fixtures describe by the manufacturer.
  46. The vast majority of aircraft control cables are terminated with swaged terminals, that must be
    checked with a go no go gauge before and after
  47. What nondestructive checking method is normally used to ensure that the correct amount of swaging has taken place when installing swaged-type terminals on aircraft control cable?
    Use a terminal gauge to check the diameter of the swaged portion of the terminal.
  48. When inspecting a control cable turnbuckle for proper installation, determine that
    the safety wire ends are wrapped a minimum of four turns around the terminal end shanks.
  49. If all instructions issued by the swaging tool manufacturer are followed when swaging a cable terminal, the resultant swaged terminal strength should be
    The full rated strength of the cable.
  50. Which is an acceptable safety device for a castle nut when installed on secondary structures?
    Cotter Pin
  51. When used in close proximity to magnetic compasses, cotter pins are made of what material?
    Corrosion Resisting Steel
  52. When a fiber or nylon insert-type, self-locking nut can be threaded on a bolt or stud through the insert with only the fingers, it should be
  53. The purpose of the vertical fin is to provide
    directional stability
  54. How are changes in direction of a control cable accomplished?
  55. What is the smallest size cable that may be used in aircraft primary control systems?
    1/8 inch
  56. After repairing or re-covering a rudder, the surface should be rebalanced
    to manufacturer's specifications
  57. Placing a piece of cloth around a stainless steel control cable and running it back and forth over the length of the cable is generally a satisfactory method of
    inspecting for broken wires
  58. The cable-operated control system of an all-metal aircraft, not incorporating a temperature compensating device, has been rigged to the correct tension in a heated hangar. If the aircraft is operated in very cold weather, the cable tension will
    decrease when the aircraft structure and cables become cold.
  59. Very often, repairs to a control surface require static rebalancing of the control surface. Generally, flight control balance condition may be determined by
    the behavior of the trailing edge when the surface is suspended from its hinge points.
  60. Excessive wear on both of the sides of a control cable pulley groove is evidence of
    Pully Misalighnment
  61. Fairleads should never deflect the alignment of a cable more than
    3 degrees
  62. Where does the breakage of control cable wires occur most frequently?
    Breakage usually occurs where cables pass over pulleys and through fairleads.
  63. With which system is differential control associated?
  64. Which statement concerning the 100-hour inspection of an airplane equipped with a push-pull tube-type control system is true?
    The threaded rod ends should be checked for the amount of thread engagement by means of the inspection hole provided.
  65. If control cables are adjusted properly and the control surfaces tend to vibrate, the probable cause is
    Worn attachment fittings
  66. Aircraft flight control trim systems must be designed and installed so that the
    pilot can determine the relative position of the trim tab from the cockpit.
  67. Stability about the axis which runs parallel to the line of flight is referred to as
    lateral stability
  68. The purpose of spring tabs or servo tabs is to
    Assist the pilot in moving the control surfaces.
  69. If the control stick of an aircraft with properly rigged flight controls is moved rearward and to the left, the right aileron will move
    down and the elavator will move up.
  70. Movement of the cockpit control toward the nosedown position during a ground operational check of the elevator trim tab system will cause the trailing edge of the trim tab to move in which direction?
    Upward Regardless of elavator position.
  71. If the control stick of an aircraft with properly rigged flight controls is moved forward and to the right, the left aileron will move
    down and the elavator will move down.
  72. If the travel of an airplane's controls is correct but the cables are rigged exceptionally tight, what probable effect will this have when flying the airplane?
    The airplane will be heavy on the controls.
  73. During inspection of the flight control system of an airplane equipped with differential-type aileron control, side-to-side movement of the control stick will cause
    Each aileron to have a greater up travel (from the streamlined position) than down travel
  74. A universal propeller protractor used to measure the degrees of aileron travel should be zeroed
    with the aileron in the Neutral Position
  75. The universal propeller protractor can be used to measure
    Degrees of Flap travel
  76. (Refer to Figure 8.) Identify the cable that is used in primary control systems and in other places where operation over pulleys is frequent.
  77. A tension regulator in the flight control cable system of a large all-metal aircraft is used primarily to
    retain a set tension
  78. (Refer to Figure 9.) When the outside air temperature is 80°F, select the acceptable 3/16 cable tension range.
    117 pound minimum, 143 pounds maximum.
  79. Differential control on an aileron system means that
    the up travel is more than the down travel
  80. Why is it generally necessary to jack an aircraft indoors for weighing?
    So that air currents do not destabilize the scales
  81. Which should be accomplished before jacking an aircraft?
    install critical stress panels or plates
  82. In Gas Tungsten Arc (GTA) welding, a stream of inert gas is used to
    prevent the formation of oxides in the puddle
  83. Which statement best describes magnesium welding?
    Filler rod should be the same composition as the base metal
  84. Which statement is true in regard to welding heat-treated magnesium?
    The welded section does not have the strength of the original metal.
  85. The oxyacetylene flame for silver soldering should be
  86. Why is it necessary to use flux in all silver soldering operations?
    To chemicaly clean the base metal of oxide film.
  87. Engine mount members should preferably be repaired by using a
    Larger diameter tube with fishmouth and rosette welds.
  88. What method of repair is recommended for a steel tube longeron dented at a cluster?
    Welded Patch Plate
  89. Welding over brazed or soldered joints is
    Not Permitted
  90. Which statement concerning soldering is correct?
    Joints in electrical wire to be soldered should be mechanicaly secure prior to soldering.
  91. A resurfaced soldering iron cannot be used effectively until after the working face has been
  92. Which of the following can normally be welded without adversely affecting strength?
    2. SAE 4130 chrome/molybdenum tubing.
  93. In selecting a torch tip size to use in welding, the size of the tip opening determines the
    amount of heat applied to the work.
  94. Why should a carburizing flame be avoided when welding steel?
    It hardens the surface
  95. The most important consideration(s) when selecting welding rod is
    Material Compatibility
  96. The oxyacetylene flame used for aluminum welding should
    be neutral and soft
  97. A very thin and pointed tip on a soldering copper is undesirable because it will
    cool to rapidly
  98. Filing or grinding a weld bead
    reduces the strength of the joint
  99. Acetylene at a line pressure above 15 PSI is
    Dangerously Unstable
  100. Cylinders used to transport and store acetylene
    contain acetone
  101. A welding torch backfire may be caused by
    a loose tip
  102. Which statement concerning a welding process is true?
    The inert arc welding process uses an inert gas to protect the weld zone from the atmosphere.
  103. Where should the flux be applied when oxyacetylene welding aluminum?
    Painted on the surface to be welded and applied to the welding rod.
  104. What purpose does flux serve in welding aluminum?
    Minimizes or Prevents Oxidation
  105. Why are aluminum plates 1/4 inch or more thick usually preheated before welding?
    Reduces internal stresses and assures more complete penetration.
  106. How should a welding torch flame be adjusted to weld stainless steel?
    slightly carburizing
  107. Oxides form very rapidly when alloys or metals are hot. It is important, therefore, when welding aluminum to use a
  108. In gas welding, the amount of heat applied to the material being welded is controlled by the
    size of the tip opening
  109. Oxygen and acetylene cylinders are made of
  110. When a butt welded joint is visually inspected for penetration,
    the penetration should be 100 percent of the thickness of the base metal
  111. Annealing of aluminum
    removes stresses cause by forming
  112. Edge notching is generally recommended in butt welding above a certain thickness of aluminum because it
    aids in getting full penetration of metal and prevents local distortion
  113. If too much acetylene is used in the welding of stainless steel,
    the metal will absorb carbon and lose its resistance to corossion
  114. The shielding gases generally used in the Gas Tungsten Arc (GTA) welding of aluminum consist of
    helium or argon, or a mixture of helium and argon