Airframe Electrical 1 Practice Test

These questions are part of the practice quiz. Start practicing

• What materials are used to plate the conductor in aircraft wiring to prevent surface oxides from forming?
• Which knot is the starting knot when tying wires together?
• What are the two types of electrical wire installation?
• Why should solid, round conductor wire be avoided in aircraft use?
• Aluminum has only about ________ % of the conductivity of copper.
• Which statement best describes what an electrical wiring diagram shows?
• Insulation resistance testing uses which unit?
• What is the primary purpose of fuses in aircraft circuits?
• In many aircraft, which DC bus supplies power to avionics and essential avionics equipment?
• If a rectifier diode is installed backwards in a rectifier circuit, what is the most direct outcome?
• Which arrangement matches the description 'one or more insulated conductors covered with a metallic braided shield'?
• Select the correct list of areas where nylon tie straps should not be used.
• What is the maximum bend radius of a coaxial cable?
• Which specification governs the manufacturing of wire for commercial and civilian aircraft?
• What are two acceptable types of cords used for bundling wire together?
• Which knot do you start with when tying wires together?
• What does a voltage drop across a wire indicate?
• What term describes providing a continuous, low-impedance path to equalize potentials and dissipate static on an airframe?
• According to the FAA, which conductors are acceptable?
• Which range represents the acceptable diameter for a wire bundle?
• Why is bare copper electrical wire not suitable for aircraft use?
• True or False: Aluminum conductors are more conductive than copper conductors.
• Aircraft system voltages can be either DC (14 or 28 VDC) or AC (115 or 200 VAC).
• In addition to voltage, what should be monitored to confirm an alternator is charging?
• No markings on wires less than ____ inches.
• What instrument is typically used to check electrical continuity?
• Which hazards are addressed by proper wiring insulation and protective measures?
• Which set correctly lists the four common aircraft system voltages?
• Which metal is used for bonding jumpers when bonding dissimilar metals?
• What are the three categories of grounds commonly recognized in aircraft wiring?
• Waxing cotton cords is intended to prevent mildew and moisture.
• Where do we use electrical tape?
• Deflection between support clamps should be how much?
• What is a common symptom of a faulty circuit breaker or relay?
• SPST stands for?
• Which conductor plating is the most common?
• What does a wiring diagram primarily show to support maintenance?
• What frequency do most aircraft power systems use, and what is a common AC voltage level?
• How do you verify the alternator is charging when the engine is running?
• Which statement correctly distinguishes amp-hours from cranking amps?
• Maximum bend radius for a wire bundle is no more than how many times the outside diameter of the largest wire?
• During a generator failure, which part of the aircraft's power system is responsible for maintaining power to critical equipment?
• Which statement about 400 Hz power systems in aircraft is true?
• What is the role of the aircraft alternator during flight?
• Which factor is not among the four factors affecting resistance?
• What is insulation resistance testing and what unit is used?
• Which term describes bundling that uses a single piece of cord to form a series of interconnected loops around the wires?
• Bonding jumpers should not exceed what resistance?
• Which factor is among the four that affect wire resistance?
• Using 400 Hz in aviation power results in transformers and motors that are:
• ___________ is a method of grouping wires together using a single piece of cord formed into several interconnected loops.
• Define ampacity and its importance in aircraft wiring.
• What is a key benefit of grouping wires into bundles?
• What are three advantages of organizing wires into groups or bundles?
• _________ is a method of grouping or bundling wires together using individual loops.
• What is the purpose of shielded electrical wire?
• Which four factors affect the resistance of wires?
• SPDT stands for?
• Commercial and civilian aircraft use wire that is manufactured under what specification?
• Which of the following is NOT listed as a bundling method in the material?
• Why are avionics often placed on an isolated avionics bus?
• Which term describes an arrangement of insulated conductors bound together for use in a specific equipment?
• 2 or more wires going to the same place is called a
• What is the potential effect of a high-resistance ground connection?
• What material has about 60 percent the conductivity of copper?
• Which pair of materials is acceptable conductors for aircraft wiring according to FAA?
• Which DC bus is intended to power essential or emergency systems during abnormal power conditions?
• One purpose of grounding the primary object to the primary structure?
• What does Ohm's law express in an electrical circuit?
• The term used for an array of insulated conductors bound together for use in specific equipment is called:
• What is the role of bonding in reducing static charges on the airframe?
• What should logbook entries for electrical maintenance include?
• Which four factors are considered when selecting the proper size of wire?
• Which method of direct marking is the best?
• Why is proper torque important when reinstalling connectors after maintenance?
• What is the primary function of a transformer-rectifier unit (TRU) in aircraft electrical systems?
• In open wiring, which items are not enclosed in a conduit or sleeve?
• A two or more wires going to the same location and tied together to retain its identity is called what?
• Which conductor plating is most common on copper conductors in aircraft wiring?
• Why is 400 Hz preferred in aviation electrical power?
• How should wires be installed to avoid condensation in boxes?
• What is the purpose of grounding in aircraft electrical systems?
• Why is proper wiring insulation and protection critical in aircraft?
• AC 43.13-1B/2B is what kind of data?
• When using a multimeter, what is the difference between measuring DC and AC?
• What is a typical method to prevent corrosion on connectors after maintenance?
• What is the maximum bonding jumper resistance expressed in milliohms?
• What is the nominal DC system voltage in most aircraft?
• If it is desirable to use wire sizes smaller than gauge 20, what must be given particular attention?
• The 3/8 inch pigtail length refers to the minimum length of what feature?
• Which marking method is considered best for direct marking?
• What is the minimum number of conductor strands required in aircraft quality wire?
• Resistance through the aircraft is negligible provided what condition?
• What type of information does an electrical wiring diagram provide?
• Lacing is permitted anywhere in the aircraft?
• Which two factors determine the amount of voltage a wire is allowed to drop?
• Why is wire plated with silver?
• Which type of battery is most common in general aviation aircraft, and what is its primary function?
• Nylon tie straps should not be used in which three areas?
• Intermittent electrical circuits are defined as circuits in which current flows for less than 2 minutes.
• Cables should be routed above the fuel line by how many inches?
• What are the three means for organizing electric wires into groups and bundles?
• An acceptable installation distance above the fuel line for aircraft wiring is?
• What safety practice should you follow before performing electrical maintenance on an aircraft?
• What is the difference between the starter and the generator in an engine's electrical system?
• Which material should be used for bonding jumpers between dissimilar metals?
• Which knot pair is used for double cord lacing?
• What factor determines the plating type used on a copper conductor?
• What is the difference between bonding and grounding in aircraft electrical systems?
• Which installation feature is used to prevent moisture from condensing at box connections?
• What should be used for cables that pass through bulkhead holes?
• The term 'cable' in aircraft electrical installations is defined as including:
• Why should you avoid touching bare conductors with bare hands when the system is energized?
• Which installation practice helps prevent condensation in electrical boxes?
• How do you mark coaxial cable?
• Cotton cords should be waxed for what purpose?
• Which shielding coverage percentage is recommended for shielding used on aircraft cables?
• In troubleshooting a non-operating DC circuit, after verifying power status and fuses, what is the next recommended step?
• What is meant by 'ground fault' in an aircraft electrical system?
• Which statement about the alternator's voltage regulator is false?
• Which tool is used to measure voltage in an aircraft electrical system?
• Most aircraft wire is rated at what voltage?
• The bend radius is measured relative to the outside diameter of which wire?
• The most important consideration in selecting aircraft wire is properly matching the wire's construction to the
• What information should be included in typical electrical maintenance documentation?
• No markings are required on wires shorter than what length?
• What is the acceptable diameter range for a wire bundle?
• Why is aircraft electrical wire alloyed?
• What minimum shielding coverage percentage is recommended?
• Which of the following is not a common aircraft system voltage?
• Which term describes a bundling arrangement when two or more wire groups are tied together to run toward the same direction?
• Wire bundles should be less than how many wires?
• What type of wiring method is most often employed in metal aircraft electrical and electronic systems?
• What is meant by load shedding in an aircraft electrical system?
• What is a major hazard when removing a battery from an energized aircraft?
• What documentation is essential when conducting electrical maintenance?
• What is a typical troubleshooting sequence for a non-operating DC circuit?
• What does a voltage regulator do in an aircraft generator system?
• Nylon tie straps cannot be used in areas where the temperature is expected to exceed how many degrees Celsius?
• What type of knots are used when performing single cord lacing or tying?
• If it is desirable to use wire sizes smaller than gauge 20, particular attention should be given to the
• After tying wire bundles with cord, the square knot pigtails should be at least how many inches long?
• Which arrangement is included in the definition of cable used in aircraft electrical installations?
• What is meant by a 'ground path' in aircraft electrical systems?
• What is the maximum spacing between supports for aircraft electrical wiring?
• How does the power distribution system protect critical systems if a generator fails?
• What component in an aircraft engine electrical system recharges the battery when the engine is running?
• Which statement about the system power sources is true?
• Why is diode orientation important in a rectifier?
• In a typical aircraft DC electrical system, what is the nominal system voltage and the main sources of power?
• Which organization provides the data used for lacing and tying wires in aircraft maintenance?
• Which knot is the starting knot when tying wires together?
• In a parallel circuit, what is true about current distribution among branches?
• What is a bus bar and what is its purpose?
• How can you determine a battery's state of charge?
• What factor determines the type of plating used on a copper conductor?
• How can you verify proper torque on electrical connectors?
• What types of knots are used when performing double cord lacing?
• In a series circuit, which statement is true?
• What is the function of a diode in a rectifier circuit?
• Which chapter of AC 43.13 contains data used to find information for lacing and tying electrical wires?
• What are typical consequences of a loose connection in an aircraft electrical circuit?
• Which item is recommended to protect cables when passing through bulkhead openings?
• What is the practice regarding wiring size in relation to ampacity?
• What is the purpose of a voltage drop test in troubleshooting?
• What is the function of a relay in aircraft electrical circuits?
• Which formula correctly defines electrical power in a DC circuit?
• How can EMI affect aircraft electrical systems and how is it mitigated?
• The resistance of the ground point on an aircraft electrical single-wire circuit should be less than how many milliohms?
• Shielded wire is primarily used to reduce which issue?
• A large voltage drop across a conductor often indicates what condition?
• Electrical tape should be used in aircraft wiring in which scenario?
• Which wiring installation method is considered preferred?
• Direct bonding to the aircraft structure should not be used to bond which material?
• What are the three main DC distribution buses in many aircraft electrical systems?
• Open wiring refers to any wire, wire group, or wire bundle not enclosed in conduit or sleeve. Which option best completes this definition?
• Which component should be used to protect cables passing through bulkhead holes?
• A two or more wire groups tied together because they are going in the same direction is called what?