Term
| What instrument measures the weight of air? |
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Definition
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Term
| How are airframe components joined? |
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Definition
| By rivets, bolts, screws, welds, or adhesives. |
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Term
| What are the five stresses to which airframes are subjected? |
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Definition
| Tension, compression, torsion, shear, and bending. |
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Term
| Which fuselage design does not use formers, frame assemblies, or bulkheads to give shape to the fuselage? |
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Definition
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Term
| What internal wing components serve as an attachment point for the skin? |
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Definition
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Term
| What type of material is usually used for construction of flight control surfaces? |
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Definition
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Term
| What is used to round out the angle formed between the fixed tail surfaces and the fuselage? |
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Definition
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Term
| What structural unit provides a smooth airflow around and into the engine inlet? |
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Definition
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Term
| What component controls airflow around the weapons to reduce turbulence in the bay on some bomber aircraft? |
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Definition
| Bay spoilers or air spoilers. |
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Term
| How do doors differ from panels? |
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Definition
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Term
| Most transparent structures on an aircraft, such as canopies, windshields, and windows, are made of what two materials? |
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Definition
| Transparent plastics or safety glass. |
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Term
| How do paint removers and stripping compounds affect the plastic facings of a radome? |
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Definition
| It may adversely affect its electrical properties or strength |
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Term
| How are fuselage station numbers measured? |
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Definition
| In inches from the reference datum or zero point on or near the aircraft nose. |
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Term
| What are the three axes that an aircraft operates around? |
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Definition
| Longitudinal, lateral, and vertical. |
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Term
| What are the lateral control surfaces of the aircraft? |
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Definition
| Ailerons, spoilers/speed brakes, and wing flaps. |
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Term
| What controls all directional movements of aircraft? |
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Definition
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Term
| What primary flight control guides the aircraft about the vertical axis? |
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Definition
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Term
| Which type of stabilator has both sides connected together so that when one side moves the other side must move in the same direction and amount? |
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Definition
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Term
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Definition
| It is a combination of an aileron and an elevator. |
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Term
| What are five types of wing flaps? |
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Definition
| Plain, split, fowler, slotted, and leading-edge slats or flaps. |
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Term
| What is the difference between leading-edge flaps and wing slats? |
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Definition
| If the leading edge operates in conjunction with the trailing edge flaps, then you have leading-edge flaps. If they operate independently of the flaps, they are called slats. |
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Term
| What is the purpose of speed brakes? |
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Definition
| Increase drag to slow the aircraft and/or reduce landing distance. |
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Term
| List the three types of trim systems. |
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Definition
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Term
| Which type of flight control system reduces the need for long cables, turnbuckles, quick disconnects, push-pull rods, and the associated flight control hardware? |
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Definition
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Term
| What are the two major parts of the AFCS? |
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Definition
| Stab aug system and the A/P system. |
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Term
| What system is used to make bomber aircraft stable for launching weapons? |
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Definition
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Term
| What auto pilot system mode automatically maintains aircraft speed? |
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Definition
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Term
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Definition
| A class of physical phenomena arising from the existence and interactions of electric charges. |
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Term
| Of what particles are atoms composed? |
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Definition
| Neutrons, protons, and electrons. |
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Term
| List four examples of insulators. |
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Definition
| Wood, rubber, plastic, and glass. |
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Term
| List four examples of conductors. |
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Definition
| Platinum, gold, copper, and silver. |
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Term
| Where do you normally use semiconductors? |
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Definition
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Term
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Definition
| Electromotive force: the electrical pressure that causes electrons to flow through the conductor. |
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Term
| Define electrical current. |
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Definition
| The movement of electrons through a conductor. |
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Term
| What factors affect the amount of resistance in a conductor? |
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Definition
| The type of material used, temperature, size. |
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Term
| What unit of measurement is used to express electrical power? |
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Definition
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Term
| What is a simple definition of magnetism? |
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Definition
| The ability of a substance to attract. |
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Term
| How are artificial magnets classified? |
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Definition
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Term
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Definition
| The ease of ability to conduct magnetic lines of force. |
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Term
| What is residual magnetism? |
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Definition
| The amount of magnetism that remains in a temporary magnet. |
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Term
| How is magnetism induced in magnetic material? |
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Definition
| Place in a magnetic field or bring it into contact with another magnet. |
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Term
| Can magnetic lines of force be insulated? |
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Definition
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Term
| What are the three most commonly used shapes of magnets? |
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Definition
| Bar, ring, and horseshoe. |
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Term
| How can a magnet be weakened? |
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Definition
| Heating or excessive jarring. |
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Term
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Definition
| A term for magnetic lines of force. |
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Term
| How is electromagnetism developed? |
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Definition
| By current of electricity. |
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Term
| When current flows through a conductor, does a magnetic field exist? |
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Definition
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Term
| What must you know to apply the “left hand rule”? |
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Definition
| The direction of the current flow. |
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Term
| What rule do you use to determine the flux direction of a wire in a loop? |
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Definition
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Term
| How can an electromagnet’s field strength be increased? |
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Definition
| By using a few turns of wire carrying a larger current or using many turns of wire carrying a small current. |
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Term
| What is the purpose of a conductor? |
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Definition
| Provide a path for electrons to flow with minimum resistance. |
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Term
| Why are protective devices installed in aircraft electrical systems? |
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Definition
| Protect against system overloads and shorts in a circuit. |
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Term
| How much time must pass before resetting a trip-free type circuit breaker? |
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Definition
| After a cooling–off period of approximately 1 minute. |
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Term
| What is the purpose of a current limiter? |
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Definition
| Provide protection against fault currents. |
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Term
| What is the purpose of a resistor? |
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Definition
| Control the amount of current flow in a circuit. |
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Term
| Why is alternating current used as the primary electrical power source in aircraft? |
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Definition
| Less power is lost during transmission and the elimination of insulation and brushes. |
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Term
| What is the unit of measurement for frequency? |
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Definition
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Term
| Define phase relationship. |
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Definition
| A condition in which two moving objects are changing in, or out, of step. |
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Term
| What are the two classifications of AC generation systems? |
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Definition
| Variable-frequency and constant-frequency. |
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Term
| What frequency is used for AC power generation on aircraft? |
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Definition
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Term
| How is voltage induced in a brush-type generator? |
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Definition
| DC from an integral exciter generator is passed through windings on the rotor. |
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Term
| What are the three generators that make up a brushless AC generator? |
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Definition
| A permanent magnet generator, an AC exciter generator, and the main AC generator. |
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Term
| What weak point was eliminated by the design of a brushless-type generator? |
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Definition
| Arcing (which more easily occurs in rarefied air). |
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Term
| What are the two main components of an AC generator? |
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Definition
| Rotor assembly and stator. |
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Term
| What three components make up the stator? |
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Definition
| PMG armature, exciter field, and main armature windings. |
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Term
| What are the two functions of the CSD governor system? |
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Definition
| To control the drive output speed and equalize the load between generators operating in parallel. |
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Term
| If CSD output rotation drives the generator below 365 Hz, what component removes the generator from the bus? |
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Definition
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Term
| If the CSD temperature rises to an overheat condition, what should be done to prevent further damage? |
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Definition
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Term
| What is installed on most IDGs to provide for easier installation and removal? |
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Definition
| A quick attach-detach clamp. |
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Term
| What are the typical functions of a GCU? |
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Definition
| Voltage regulation, frequency and load control, real and reactive load division, over/underexcitation protection, over/underfrequency protection, open phase protection, reverse power protection, differential current protection, engine underspeed protection, generator circuit breaker and bus tie breaker control, no-break power transfer, and generator disconnect control. |
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Term
| How is voltage regulation and current limiting accomplished in the GCU? |
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Definition
| By varying the generator excitation field. |
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Term
| How does the frequency and load controller for each generator system regulate the frequency of the generator CSD? |
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Definition
| By controlling the magnetic trim head governor on the CSD. |
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Term
| What are the internal components of a battery? |
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Definition
| Plates, separators, and electrolyte. |
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