ASA Electrical System Practice Test

These questions are part of the practice quiz. Start practicing

• Which statement relating to electric wiring is true?
• Where is the pin section of an AN/MS connector normally installed?
• What unit is used to rate the capacity of aircraft fuses?
• How should the splices be arranged if several are to be located in an electrical wire bundle?
• What must be maintained at a constant value when using the voltage drop method of checking circuit resistance?
• When selecting hardware for attaching bonding connections to an aircraft, which factors should be considered?
• Which type of battery is primarily associated with the phenomenon of thermal runaway?
• What is the purpose of a capacitor when connected to a generator?
• To minimize radio interference, how should a capacitor be connected to the generator?
• Which part of an electrical circuit typically serves to interrupt or break the flow of current?
• What method is commonly used to counteract the effects of armature reaction?
• When bundling open wiring in aircraft, what is a critical consideration?
• What mechanism is used to stop the rotation of an electric motor armature?
• How is a shunt-wound DC generator configured?
• Which condition can lead to generator brush arcing?
• What is the voltage drop for a No. 18 copper wire 50 feet long to carry 12.5 amperes during continuous operation?
• What hazard is associated with the oil canning of junction box sides?
• Which method is used to restore generator field residual magnetism?
• What occurs when the voltage output of a generator drops below battery potential and the relay fails?
• What is necessary when operating two aircraft AC generators in parallel?
• A circuit breaker is installed in an aircraft electrical system primarily to protect the?
• What type of system do Integrated Drive Generators (IDGs) utilize to produce current?
• Why must coaxial cables be routed as directly as possible?
• What can be done to reduce the possibility of damage to long lengths of electrical cable being pulled through rigid conduit?
• How may the voltage output of an alternator be regulated?
• What electrical phenomenon is specifically mitigated by lamination in induction coils?
• What is the primary method to maintain a constant voltage output from an aircraft generator regardless of speed and load changes?
• What is the purpose of a capacitor in a starter motor circuit?
• What safety measure should be taken when working on electrical systems?
• What should be used to protect electric cables passing through holes in bulkheads, ribs, or firewalls?
• In aircraft electrical systems, what is the recommendation regarding automatic reset circuit breakers?
• Which factors must be considered when determining the wire size for an aircraft installation?
• What does an interrupted duty cycle imply in terms of operation time?
• What is the condition under which a CSD unit can be reconnected after disconnection during flight?
• When installing an anticollision light, what must be accomplished?
• In certain transport aircraft using AC electrical power, how are batteries kept charged?
• What is the primary function of static inverters in an electrical system?
• What does the circuit breaker in the instrument lighting system primarily protect?
• What happens to a voltmeter reading if the positive terminal is connected to the negative terminal of a source?
• Aircraft electrical junction boxes in a fire zone are generally made from what material?
• If a generator in a 24-volt dc system shows low voltage, what is the likely issue?
• The pole pieces or shoes in a DC generator are part of which assembly?
• What would be a likely consequence of re-establishing a faulty CSD unit during flight?
• Which type of generator part is crucial for converting the output of the armature from AC to DC?
• Which type of motor is most likely to have an armature brake?
• How is the output voltage of an inductor-type inverter controlled?
• What is the primary type of current that static inverters convert?
• The three kinds of circuit protection devices used most commonly in aircraft circuits are?
• What action occurs when a generator's overvoltage control is triggered?
• What is the purpose of selecting derated switches for known continuous load current applications?
• What action should be taken if a CSD unit experiences an overtemperature malfunction?
• What happens to the amperage in an AC transformer if the secondary voltage is greater than the primary?
• During the installation of aircraft wiring, where should the wire bundle be located relative to flammable fluid lines?
• The most common method of attaching a pin or socket to an individual wire in an MS electrical connector is by what method?
• If a generator's field lead experiences a fault while running, what type of voltage might be detected?
• What happens if the voltage regulator fails in a generator system?
• What should be ensured when handling a high voltage capacitor in an electrical circuit?
• What are the primary considerations when selecting the size of electric cable?
• How are CSD driven generators typically cooled?
• At what percent of the generator or alternator rating can the ammeter be redlined in certain installations?
• What is the principal advantage of a series-wound DC motor?
• Which of the following are major parts of a DC motor?
• Which of the following is NOT a purpose of interpoles in a generator?
• What is one advantage of using AC electrical power in aircraft?
• What is the main benefit of having two sets of field windings in an electric motor?
• In an aircraft generator, the inverse current is handled through which part if the relay fails?
• Why is grounding an electrically conductive object to the primary structure important?
• What is the best practice for making major adjustments to equipment like regulators and inverters?
• In a transformer designed to triple its input voltage, what is the relationship of the turns between the primary and secondary coils?
• What procedure is used to test generator or motor armature windings for opens?
• What is the most accurate type of frequency-measuring instrument?
• During an inspection of an anticollision light installation, what should be verified?
• What determines the level of current required by a series-wound DC motor at various RPMs?
• What is the purpose of bonding in electrical systems?
• When using an ohmmeter to check the continuity of a generator field coil, what result indicates a healthy series field coil?
• What safety consideration is essential when testing electrical components?
• Where do you typically find the highest resistance in a faulty generator circuit?
• What is the main function of a generator's field shoes?
• If a single switch controls all navigation lights, how are the lights most likely arranged?
• If a wire is installed so that it comes in contact with some moving parts, what protection should be given the wire?
• What is the main function of a current limiter in an electrical system?
• Which type of electric wire terminals are most commonly required for aircraft applications?
• What type of switch is often used in circuits that must be operated only in emergencies?
• If a reverse current cutout relay fails to open, how will current flow through the generator armature?
• How does overvoltage control maintain safety in a generator system?
• What does a voltmeter indicate if the positive field lead between a generator and a control panel breaks and shorts while the engine is running?
• What role does an ohmmeter play in electrical troubleshooting?
• What is a primary consideration when crimping terminals onto wires for aircraft use?
• What protection does conduit offer to wires and cables in aircraft installations?
• Which component is essential for managing the voltage output of a dc generator?
• What is the purpose of laminating the poles of a generator?
• What factor does the frequency of an alternator depend upon?
• What is one method to change the direction of rotation in a dc electric motor?
• What is the most common voltage regulation method for a compound dc generator?
• In an AC circuit with no phase lead or lag, which statement is true?
• During what conditions should static inverters be operated?
• Which method is typically used to provide current suitable for battery charging in aircraft operating with AC generators?
• A series-wound DC electric motor generally requires what at low RPM compared to high RPM?
• What is the minimum bend radius for an electrical wire bundle?
• What is most likely to cause thermal runaway in a nickel-cadmium battery?
• What is crucial for the operation of static inverters?
• AN/MS electrical connectors are specifically designed to meet what standards?
• What is the primary advantage of using a brushless system in generators?
• During ground operation, how is aircraft generator cooling usually accomplished?
• In terms of safety, what role do grommets play?
• Which element is critical in ensuring electrical circuits do not overheat?
• How does the routing of coaxial cables compare to the routing of electrical wiring?
• What type of switch is used to control navigation lights in a single circuit?
• What type of instrument is used for measuring very high values of resistance?
• What task is often performed by maintenance personnel involving static inverters?
• What is a benefit of having resettable devices in electrical systems?
• When checking a diode for an open or short circuit, what is the proper procedure?
• What is normally used to bond noncontinuous stainless steel aircraft components?
• What is the primary benefit of a current limiter?
• What is the main advantage of a circuit breaker compared to a fuse?
• Why is load sharing critical when connecting multiple dc generators?
• What component is used to protect electric circuits from overheating?
• What function does a voltage regulator serve in a generator?
• How many cycles of AC voltage can a six-pole alternator with a revolving field produce in one rotor revolution?
• What is a major advantage of alternating current (AC) over direct current (DC)?
• What does the continuous rating of electrical switches indicate?
• Why is it necessary for maintenance personnel to be involved in the reconnection of a CSD unit?
• What is crucial when adjusting the output of parallel dc generators?
• The type of electric wire terminals used in most aircraft applications is primarily designed to achieve what?
• What is a crucial factor in selecting aircraft fuses?
• How should a voltmeter be connected?
• What component is commonly used in the operation of static inverters?
• What effect does the starting current of a series-wound DC motor have?
• To what depth is the mica insulation between the commutator bars of a DC generator undercut?
• A current limiter is essentially a slow-blow fuse and is designed to be used in?
• What is the primary benefit of using rectifiers in an aircraft electrical system?
• The nominal rating of electrical switches refers to which of the following?
• What should be done if the IDG scavenge oil filter shows contamination with metal?
• A single-pole, double-throw switch (SPDT) indicates what regarding the switch's functionality?
• Bonding connections should be tested for?
• When operating dc generators in parallel, what is essential for equitable load distribution?
• What is one key purpose of conducting a growler test?
• What is an aircraft electrical circuit control relay classified as?
• Which copper electrical cable size should replace a No. 6 aluminum electrical cable?
• What is the main purpose of an ammeter in a battery charging system?
• What kind of switch should you install in a single wire circuit that requires the switch to be manually held in the ON position?
• What is one of the major parts of a DC motor?
• Which component helps in controlling the output of a generator in an aircraft electrical system?
• How does the load carried by a generator affect a vibrator-type voltage regulator?
• Why might a CSD unit become disconnected in flight?
• If it is necessary to use an electrical connector where it may be exposed to moisture, the mechanic should?
• What is the role of the commutator in a generator?
• Why must aluminum wire be stripped carefully?
• How many basic types of DC motors are there, and what are they?
• Which action is NOT permitted with a CSD unit once it is disconnected in flight?
• What is essential for ensuring safety when dealing with high voltage capacitors?
• When dc generators are not synchronized properly, what component helps balance the output?
• What component in a generator prevents sparking to the brush guides due to the movement of brushes?
• What does a positive resistance reading on an ohmmeter indicate when testing a circuit component?
• Where is the generator rating typically found?
• What aspect of aircraft wire terminals is designed to ensure reliability?
• In the American Wire Gauge (AWG) system, the number assigned to a wire size is related to its?
• What does the RPM of a generator influence?
• What is the maximum number of splices permitted between any two connectors?
• If the voltage in an AC transformer secondary contains twice as many loops as the primary, what happens to the voltage?
• When selecting electric cable size for alterations, what criteria should be considered?
• Which statement describes the role of oscillators in static inverters?
• How can it be determined if a transformer winding has some of its turns shorted together?
• What is the acceptable method of attaching a terminal to a wire for general electrical use in aircraft?
• What must be considered for the proper operation of navigation lights in aircraft?
• What is the maximum duration that a circuit can operate to be classified as intermittent duty?
• How is a CSD disconnect typically accomplished during operation?
• Which component is essential for regulating current in a battery charging system?
• Which of the following describes a malfunction that could lead to the disconnection of a CSD unit?
• How are electrical generators typically rated?
• What are the colors and orientations of position lights for navigation on civil airplanes?
• What is the primary function of a rectifier?
• What safety aspect is emphasized for reconnecting a malfunctioned CSD unit?
• What determines the strength of the core of an electromagnet?
• What process ensures that electrical connections remain secure in a generator system?
• What is the primary function of a rectifier in an electrical system?
• What happens to a generator's output if the field current is reduced?
• When adding a rheostat to a light circuit, how should it be connected?
• What is the primary purpose of a current limiter in electrical circuits?
• Why is it important to consider the current-carrying capacity of a wire?
• Residual voltage is primarily a result of which component in the generator?
• What should be checked regarding terminal strips during an aircraft electrical system inspection?
• Why are the iron cores of most induction coils laminated?
• A CSD unit drives a generator using which mechanism?
• Which wiring method is most commonly used to improve electrical connections?
• What is typically a characteristics of derated electrical components?
• Which type of DC generator is NOT typically used as an airplane generator?