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Vol #2 - 2A551
100 Q & A
| Question | Answer |
|---|---|
| 1. (201) The maintenance stand with an adjustable height of 13 to 20 feet is the | B–2. |
| 2. (201) Of the following, the maintenance stand that is a scissor-type is the | B–4. |
| 3. (201) The type of jack normally used to change a tire on the aircraft is the | axle. |
| 4. (201) The boiling point of liquid oxygen (LOX) is | –297°F. |
| 5. (201) The low- and high-pressure capabilities, as measured in pounds per square inch gage (psig),of the NSU-L75 nitrogen-servicing unit are | 0–350; 350–3,600. |
| 6. (201) The high-pressure pump provides a hydraulic filler pressurization unit with a maximum pressure of | 3,000 psi. |
| 7. (201) The model 4000 engine trailer can support a maximum load of | 8,000 pounds. |
| 8. (202) The usable pressure range, as measured in pounds per square inch (psi), of the MC–1A air compressor is | 0–3,200. |
| 9. (202) The MC–2A air compressor is capable of delivering air at a maximum pressure, measured in pounds per square inch (psi), of | 200. |
| 10. (202) The H–1 heater has an adjustable heat output that ranges from | 150°F to 280°F. |
| 11. (202) The stationary, skid-mounted power unit that produces aircraft electrical power for use in shops and hangars is the | MD-4 |
| 12. (202) The unit capable of providing both alternating current (AC) and direct current (DC) electrical power in addition to pneumatic power for ground maintenance is the | A/M32A–60. |
| 13. (202) The hydraulic systems on the MK–3A–1 hydraulic test stand are designated | No. 1 and No. 2. |
| 14. (202) The amount of fluid the MJ–2A reservoir holds is | 27 gallons. |
| 15. (202) A Class I MB–2 tractor weighs | 40,000 pounds. |
| 16. (203) The structural members, whose chief use is to give shape to the aircraft and provide a means for attaching the skin to the structure, are called | stringers. |
| 17. (203) The most common type of material used for fuselage construction is | aluminum alloy. |
| 18. (203) The wing components that provide strength and contour shape to the wing are the | ribs. |
| 19. (203) The main difference between inspection plates and panels is | size. |
| 20. (203) A cracked radome could cause | microwave distortion. |
| 21. (203) The reference locations, which are in the vertical direction measured from a reference datum that is usually well below the aircraft, are called | Waterlines |
| 22. (204) The category of –21 equipment used for life support and crew comfort is | III. |
| 23. (204) The effective range of a fully charged handheld fire extinguisher is | 20 feet. |
| 24. (205) The first practical laminated composite formed was | plywood |
| 25. (206) A barometer is designed to measure pressure in | inches of mercury. |
| 26. (206) Atmospheric pressure at sea level is | 14.7 pounds per square inch (psi). |
| 27. (206) The force that acts parallel to the relative wind is | drag |
| 28. (207) The axis that extends lengthwise through the fuselage from the nose to the tail is the | longitudinal. |
| 29. (207) The axis that extends crosswise from wing tip to wing tip is the | lateral. |
| 30. (207) Movement about the vertical axis is called | yaw. |
| 31. (207) The flight control located on the longitudinal control surface is the | elevator. |
| 32. (207) The type of flight control system that allows the pilot to control the aircraft if hydraulic pressure is lost is | manual |
| 33. (207) When making a right turn, the relative position of the ailerons is the right aileron | up, left aileron down. |
| 34. (207) The flight control surfaces used to make an aircraft climb or dive are | elevators. |
| 35. (207) The type of flap normally incorporated on bomber and cargo type aircraft is | fowler. |
| 36. (207) Aircraft have trim systems to | correct minor deviations in flight attitude. |
| 37. (208) The law that states, “the distortion of any elastic body is proportional to the distorting force” is known as | Hook’s Law. |
| 38. (208) When any force causes a solid to change permanently, the solid is said to have | passed the elastic limit. |
| 39. (208) The most outstanding characteristic of a liquid is its | ability to conform to the shape of its container. |
| 40. (208) Pascal’s Law applies to | confined fluids at rest. |
| 41. (208) Among the first to study the compressibility of gases was | Boyle. |
| 42. (208) The person who found that all gases expand and contract in direct proportion to the change in temperature, provided the pressure remains constant, was | Charles. |
| 43. (209) If 50 pounds per square inch (psi) of cylinder pressure acts on a 5-square-inch piston head, the resulting force will be | 250 pounds. |
| 44. (209) When an 8-square-inch piston moves 5 inches within a cylinder, the volume of liquid displaced will be | 40 cubic inches. |
| 45. (209) The principle, which states that as the velocity of a gas or liquid increases, pressure decreases, is | Bernoulli’s. |
| 46. (209) As fluid enters the narrow portion of a venturi, | it accelerates. |
| 47. (210) When referring to hydraulic hand pumps, double-action means | fluid-flow is created with each stroke of the pump handle. |
| 48. (210) Variable-volume pumps do not require a separate pressure-regulating device in the system because | they have an integral compensator. |
| 49. (210) Cooler operation in a variable-volume hydraulic pump is provided by | creep plates. |
| 50. (210) In the Stratopower variable-volume pump, the pistons are held in contact with the cam plate by the | nutating plate. |
| 51. (211) An accumulator’s piston is installed with the | hollow end toward the air side of the accumulator. |
| 52. (211) The size of one micron is four | millionths of an inch. |
| 53. (211) If a filter is rated at 10 microns nominal, it | may allow some particles 10 microns or larger to get through. |
| 54. (211) Hydraulic manifolds are used in a hydraulic system to provide a location where the | common fluid lines can come together. |
| 55. (212) The pneudraulic system component that uses a single-acting actuating cylinder is the | brake assembly |
| 56. (212) What pneudraulic system component uses a double-acting balanced actuating cylinder? | nosewheel steering |
| 57. (212) Some aircraft manufactures use the term “power control cylinders” when referring to | tandem actuators |
| 58. (212) The pressure at which the relief valve ball is slightly unseated is called the | cracking pressure |
| 59. (212) The major advantage of the manual slide-type hydraulic selector valve is its | metering ability |
| 60. (212) The difference between a selector valve and a servo valve is the | servo valve will control fluid-flow |
| 61. (212) The purpose of a hydraulic system check valve is to | allow flow in only one direction |
| 62. (212) Another name for a flapper check valve is | gate check valve |
| 63. (212) Allowing normal operating speed of a hydraulic actuator in one direction while limiting speed in the other direction is done by the | restrictor check valve |
| 64. (213) The four major sections of a basic hydraulic system are | supply, pressure, return, and auxiliary |
| 65. (213) The basic units of a hydraulic hand pump system are the | reservoir, pump, actuator and manual shutoff valve |
| 66. (213) The reservoir supplies hydraulic fluid to a hand pump | by gravity and the suction effect of the pump |
| 67. (213) A relief valve is installed in a variable-volume hydraulic pump to | relieve pressure if the pump compensator fails |
| 68. (213) In most hydraulic subsystems, the actuating units are connected | in parallel |
| 69. (214) The shock strut component that controls the rate of fluid-flow through the orifice is the | metering pin |
| 70. (214) The purpose of the torsion links on a main landing gear is to | prevent the inner cylinder from rotating within the outer cylinder |
| 71. (214) The motion of the landing gear control lever is transmitted to the selector valve | by a cable system |
| 72. (214) Landing gear safety switches are actuated by | torsion links |
| 73. (214) The two most common types of shimmy dampers used in nose wheel steering are the | piston and vane |
| 74. (215) The purpose of aircraft brakes is to | retard motion using friction |
| 75. (215) The purpose of deboosters is to | reduce braking pressure |
| 76. (215) The two types of emergency brake systems are | hydraulic and pneumatic |
| 77. (215) The purpose of the antiskid system is to | prevent wheel skid by releasing pressure from the skidding wheel |
| 78. (216) Split wheels are balanced | individually by halves |
| 79. (216) An airtight seal is maintained between split wheel halves by use of | an O-ring seal |
| 80. (216) The type of bearings used on aircraft wheels is | tapered roller |
| 81. (216) The bearing cone of an aircraft wheel bearing is also called the | inner race |
| 82. (216) The kinds of pitting that affect bearings are | corrosive and mechanical |
| 83. (216) The two types of brinelling are | true and false |
| 84. (217) An aircraft tire’s maximum recommended static load is called the | ply rating |
| 85. (217) The term “ply rating” refers to the | index of tire casting strengths |
| 86. (217) For tires 24 inches or greater outside diameter, the tire shall be removed when wear reaches the bottom of any tread groove for a continuous length of | 12 inches |
| 87. (218) Matter is any substance that has mass and | occupies space |
| 88. (218) Atoms are made up of | protons, neutrons and electrons |
| 89. (218) Electrons can be released from their outer orbit by all of the following forces except | cold |
| 90. (219) The greater the current flow through an electromagnet, the | greater the strength |
| 91. (219) To determine the direction a current-carrying conductor will move in a magnetic field, you should use the | left-hand rule for conductors |
| 92. (220) Current that periodically reverses is called | alternating |
| 93. (220) The term used to express a condition in which two moving objects are changing in or out of step is | phase |
| 94. (220) The methods used to cool brushless alternating current (AC) generators are | engine oil and blast air |
| 95. (220) The underspeed switch (USS) on the 60/80 kilovolt ampere (KVA) generator constant speed drive (CSD) actuates at | 365 Hz. |
| 96. (221) The internal component of a battery that is a grid or framework, which supports the active chemical materials, is the | plate. |
| 97. (221) A 24-volt nickel-cadmium battery has | 19 cells |
| 98. (221) The nickel-cadmium battery | electrolyte will appear to be low when the cells are partially discharge |
| 99. (221) The component designed to convert 115/220-volt alternating current (AC) power into 28-volts (or less) direct current (DC) to operate the aircraft DC system is the | transformer-rectifier (T-R). |
| 100. (222) When measuring resistance on a multimeter, the letters OL indicate | infinity. |
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