Test
SIMULADOR 5 EXAMEN LICENCIA TLA SOLO SISTEMAS ELECTRICOS (INGLES)
Este test tiene tiempo límite, así que se abre en el reproductor de siempre.
Preguntas del test (150)
1A series-wound dc electric motor will normally require
- A"more current at high RPM than at low RPM."
- Bapproximately the same current throughout its operating range of speed.
- C"more current at low RPM than at high RPM."
- Dhigh resistance will develop in stripping nicks.
2A voltage regulator controls generator output by
- A"introducing a resistance in generator-to-battery lead in the event of overload."
- Bshorting out field coil in the event of overload.
- CSeries wound.
- Dvarying current flow to generator field coil.
3Aluminum wire must be stripped very carefully because
- Ahigh resistance will develop in stripping nicks.
- Bstripping nicks can cause short circuits.
- Cindividual strands will break easily after being nicked.
- Dto prevent circuit failure due to terminal disconnection.
4An ammeter in a battery charging system is for the purpose of indicating the
- Aamperage available for use.
- Btotal amperes being used in the airplane.
- Crate of current used to charge the battery.
- Dstripping nicks can cause short circuits.
5For general electrical use in aircraft, the acceptable method of attaching a terminal to a wire is by
- Acrimping.
- Bsoldering.
- Ccrimping and soldering.
- DRolling
6How can it be determined if a transformer winding has some of its turns shorted together?
- AMeasure the input voltage with an ohmmeter.
- BThe output voltage will be high.
- CThe transformer will get hot in normal operation.
- DA high internal resistance condition.
7How does the magnetic brake used to stop rotation of an electric motor armature operate?
- A"Centrifugal force releases a rotating brake cog from a stationary notch when the armature reaches a certain speed and magnetic force re-engages the cog when the electrical power is turned off."
- BA friction brake is applied by a magnet and released by a spring.
- Capproximately the same current throughout its operating range of speed.
- DA friction brake is applied by a spring and released by a magnet.
8"How many cycles of ac voltage are produced in a six-pole alternator of the revolving-field type
for each revolution of the rotor?"- AFour.
- BThree.
- CSix.
- DTwo
9If a generator is equipped with a vibrator-type voltage regulator, the actual time the voltage regulator points remain open
- Adepends on the load carried by the generator.
- Bis controlled by the reverse-current cutout relay point clearance.
- Cis increased when the external load is greater than the generator output.
- Dmotor can be operated in either direction.
10"If the reverse current cutout relay contact points fail to open after the generator output has dropped below battery potential, current will flow through the generator armature"
- A"in the normal direction and through the shunt field opposite the normal direction."
- Band the shunt field opposite the normal direction.
- C"Centrifugal force releases a rotating brake cog from a stationary notch when the armature reaches a certain speed and magnetic force re-engages the cog when the electrical power is turned off."
- Dopposite the normal direction and through the shunt field in the normal direction.
11One purpose of a growler test is to determine the presence of
- Aan out-of-round commutator.
- Ba broken field lead.
- Ca shorted armature.
- Dpower output of the motor can be more closely controlled.
12The commutator of a generator
- Achanges direct current produced in the armature into alternating current as it is taken from the armature.
- Bchanges alternating current produced in the armature into direct current as it is taken from the armature.
- C"reverses the current in the field coils at the proper time in order to produce direct current."
- Dtotal amperes being used in the airplane.
13The method most often used in overcoming the effect of armature reaction is through the use of
- Ainterpoles.
- Bshaded poles.
- Cdrum-wound armatures in combination with a negatively connected series field.
- Dopposite the normal direction and through the shunt field in the normal direction.
14The only practical method of maintaining a constant voltage output from an aircraft generator under varying conditions of speed and load is to vary the
- Astrength of the magnetic field.
- Bnumber of conductors in the armature.
- Cspeed at which the armature rotates.
- Damperes and frequency must both be equal.
15The pole pieces or shoes used in a dc generator are a part of the
- Aarmature assembly.
- Bfield assembly.
- Cbrush assembly.
- DInverter drive motor.
16The starting current of a series-wound dc motor, in passing through both the field and armature windings, produces a
- Alow starting torque.
- Bspeed slightly higher when unloaded.
- Chigh starting torque.
- DStarter motor.
17The type of electric wire terminals used for most aircraft applications, in addition to providing good current carrying capabilities, are designed primarily
- Ato prevent circuit failure due to terminal disconnection.
- Bfor uncomplicated and rapid circuit connection and disconnection.
- Cfor permanent connection to the circuit.
- DReduce field strength.
18To test generator or motor armature windings for opens,
- A"place armature in a growler and connect a 110V test light on adjacent segments; light should light."
- Bcheck adjacent segments on commutator with an ohmmeter on the high resistance scale.
- Cuse a 12/24V test light between the armature core segments and the shaft.
- Drate of current used to charge the battery.
19To what depth is the mica insulation between the commutator bars of a dc generator undercut?
- AOne-half the width of the mica.
- BEqual to twice the width of the mica.
- CEqual to the width of the mica.
- DThree-half the width of the mica.
20What is a cause of generator brush arcing?
- A"Seating brushes with No. 000 sandpaper.
- B"Carbon dust particles.
- CLow spring tension.
- Damperes and voltage must both be equal.
21What is the color and orientation of the position lights for navigation on civil airplanes?
- ALeft side - green, right side - red, rear aft - white.
- BLeft side - red, right side - green, rear aft - white.
- C"Left side - white, right side - green, rear aft - red."
- DLeft side - White, right side - red, rear aft - white.
22What is the minimum bend radius for an electrical wire bundle?
- AForty times the outside diameter of the bundle.
- BFive times the outside diameter of the bundle.
- CFifteen times the outside diameter of the bundle.
- DTen times the outside diameter of the bundle.
23What is the most accurate type of frequency- measuring instrument?
- AIntegrated circuit chip having a clock circuit.
- BElectrodynamometers using electromagnetic fields.
- CElectromagnets using one permanent magnet.
- Dchecked with a milliamp ammeter.
24What is the principal advantage of the series- wound dc motor?
- AHigh starting torque.
- BSuitable for constant speed use.
- CLow starting torque.
- Dspeed of the motor can be more closely controlled.
25When ac generators are operated in parallel, the
- Aamperes and frequency must both be equal.
- Bfrequency and voltage must both be equal.
- Camperes and voltage must both be equal.
- Dshaded poles.
26When approved, splices may be used to repair manufactured harnesses or installed wiring. The maximum number of splices permitted between any two connectors is
- AFour
- Btwo.
- Cthree.
- Done.
27Which motor would be most likely to have an armature brake?
- AStarter motor.
- BLanding light retraction motor.
- CInverter drive motor.
- Dfield assembly.
28Which of the following is most likely to cause thermal runaway in a nickel-cadmium battery?
- AA high internal resistance condition.
- BExcessive current draw from the battery.
- C"Constant current charging of the battery to more than 100 percent of its capacity."
- Dhas at least a residual charge before removing it from the circuit.
29Which type of dc generator is not used as an airplane generator?
- AExternally grounded.
- BSeries wound.
- CCompound wound.
- DShunt-type ohmmeter.
30Electric wire terminals for most aircraft applications must be what type?
- ASlotted.
- BHook.
- CRing.
- DTappered
31How should the splices be arranged if several are to be located in an electrical wire bundle?
- AStaggered along the length of the bundle.
- BGrouped together to facilitate inspection.
- CEnclosed in a conduit.
- Dsoldering.
32In a generator, what eliminates any possible sparking to the brush guides caused by the movement of the brushes within the holder?
- AThe brush pigtail.
- BBrush spring tension.
- CUndercutting the mica on the commutator.
- DA friction brake is applied by a magnet and released by a spring.
33Some electric motors have two sets of field windings wound in opposite directions so that the
- Aspeed of the motor can be more closely controlled.
- Bpower output of the motor can be more closely controlled.
- Cmotor can be operated in either direction.
- Da broken field lead.
34What type of instrument is used for measuring very high values of resistance?
- AMegohmmeter.
- BShunt-type ohmmeter.
- CMultimeter.
- D"introducing a resistance in generator-to-battery lead in the event of overload."
35When a diode is checked for an open circuit or a short circuit, it should be
- Ain the circuit.
- Bdisconnected from the circuit.
- CElectromagnets using one permanent magnet.
- Dchecked with a milliamp ammeter.
36When handling a high voltage capacitor in an electrical circuit, be sure it
- Ahas a full charge before removing it from the circuit.
- Bhas at least a residual charge before removing it from the circuit.
- Cis fully discharged before removing it from the circuit.
- DExcessive current draw from the battery.
37Which of the following is not one of the purposes of interpoles in a generator?
- AReduce field strength.
- BOvercome armature reaction.
- CReduce arcing at the brushes.
- Dstripping nicks can cause short circuits.
38¿Que actividades realiza el relé de protección diferencial?
- AAbre el relé de generador y cierra el relé de cruce
- BAbre el relé de cruce y cierra el relé de generador
- CCompara el voltaje que sale del generador con el voltaje que llega al punto de distribución
- DCompara la corriente que sale del generador con la corriente que llega al punto de distribución
39A battery-generator system provides direct current. On installations requiring alternating current from the battery-generator system, it is necessary to have
- Aa transformer.
- Ba magnetically operated switch.
- Ca variable resistor between the battery and generator.
- Dan inverter.
40A certain switch is described as a single-pole, double-throw switch (SPDT). The throw of a switch indicates the number of
- Acircuits each pole can complete through the switch.
- Bplaces at which the operating device (toggle, plunger, etc.) will come to rest and at the same time open or close a circuit.
- Cterminals at which current can enter or leave the switch.
- Dare useful where only temporary overloads are normally encountered.
41A circuit breaker is installed in an aircraft electrical system primarily to protect the
- Acircuit and should be located as close to the source as possible.
- Bcircuit and should be located as close to the unit as possible.
- Celectrical unit in the circuit and should be located as close to the source as possible.
- D"To prevent short circuits in the motor field windings."
42A circuit protection device called a current limiter is essentially a slow-blow fuse and is designed to be used in
- A400 cycle AC circuits.
- Bheavy power circuits.
- Cstarter-generator circuits.
- DPass through conduit.
43A CSD unit drives a generator through the use of
- Aa synchronous electric motor.
- Ban infinitely variable mechanical gearing system.
- Ca variable hydraulic pump and hydraulic motor.
- Dincrease flux concentration.
44A relay is
- Aa magnetically operated switch.
- Ba device which converts electrical energy to kinetic energy.
- Cany conductor which receives electrical energy and passes it on with little or no resistance.
- Dthe frequency of alternating current.
45A voltage regulator controls generator voltage by changing the
- Aresistance in the generator output circuit.
- Bcurrent in the generator output circuit.
- Cresistance of the generator field circuit.
- D"decreasing the output of the high generator to equal the output of the low generator."
46Aircraft electrical junction boxes located in a fire zone are usually constructed of
- Aasbestos.
- Bcadmium-plated steel.
- CIron steel copper
- Dstainless steel.
47Aircraft fuse capacity is rated in
- Avolts.
- Bohms.
- Camperes.
- DWatts
48Aircraft which operate only ac generators (alternators) as a primary source of electrical power normally provide current suitable for battery charging through the use of
- Aa stepdown transformer and a rectifier.
- Ban inverter and a voltage- dropping resistor.
- Ca dynamotor with a half- wave dc output.
- Da variable resistor between the battery and generator.
49Algunos motores eléctricos tienen dos juegos de embobinados de campo en direcciones opuestas de forma tal que
- ALa velocidad del motor pueda ser controladas de más cerca.
- BLa potencia de salida del motor pueda ser controlada de mas cerca.
- CEl motor pueda ser operado en cualquier dirección.
- DLas revoluciones de salida del motor pueda ser controlada de mas cerca.
50Bonding connections should be tested for
- Aresistance value.
- Bamperage value.
- Creactance.
- DAlternator
51Certain transport aircraft use ac electrical power for all normal operation and battery furnished dc electrical power for standby emergency use. In aircraft of this type that operate no dc generators, the batteries are kept charged by
- Ainverters which use the aircraft's ac generators as a source of power.
- Balternators which use the aircraft's generators as a source of power.
- Crectifiers which use the aircraft's ac generators as a source of power.
- Dresidual voltage.
52Circuits that must be operated only in an emergency or whose inadvertent activation could endanger a system frequently employ
- Aguarded switches.
- Bpush-pull-type circuit breakers only (no switches).
- Cspring-loaded to off toggle or rocker switches.
- Donly locknuts have been used for terminal attachment to the studs.
53CSD driven generators are usually cooled by
- Aoil spray.
- Ban integral fan.
- Cboth ram air and an integral fan.
- Dbattery current to excite the field.
54Cuál es la ventaja principal de un motor de corriente continua (direct current, DC) embobinado en serie?
- AVelocidad variable
- BAdecuado para uso a velocidad constante.
- CBaja torsión de arranque.
- DAlta torsión de arranque.
55Cuál es una causa de que arqueen las brochas del generador?
- A"Asentar las brochas con papel de lija número 000.
- B"Partículas de polvo de carbón.
- CPoca tensión en los resortes.
- DPolvo y condiciones ambientales
56Cuando dos o más generadores de corriente alterna se van a conectar en paralelo, se deben cumplir las siguientes condiciones antes de su conexión:
- AIgual corriente, igual frecuencia, igual fase e igual sincronismo
- Bigual sincronismo, igual corriente, igual voltaje e igual frecuencia
- CIgual factor de potencia, igual fase, igual voltaje e igual frecuencia
- DIgual fase, igual voltaje, igual frecuencia e igual sincronismo
57Cuando generadores de corriente alterna son operados en paralelo,
- ALos amperios y la frecuencia deben ser ambas iguales.
- BLa frecuencia y el voltaje deben ser ambos iguales.
- CLos amperios y el voltaje deben ser ambos iguales.
- DTorsión baja de arranque.
58Cuando la tensión de salida de un generador baja de un valor determinado (unos 107 voltios aproximadamente) se dice que el generador tiene bajo voltaje. El bajo voltaje puede tener su origen en:
- AExceso de revoluciones de la C.S.D
- BBarra defectuosa
- CExceso de revoluciones del motor
- DBatería descargada
59During inspection of an anticollision light installation for condition and proper operation, it should be determined that
- Aelectrical or mechanical interconnections are provided so that the anticollision light will operate at all times that the position light switch is in the ON position.
- Ban appropriately rated fuse is in position at the light to protect the connecting wiring against electrical faults.
- Cthe anticollision light can be operated independently of the position lights.
- Dany conductor which receives electrical energy and passes it on with little or no resistance.
60During inspection of the terminal strips of an aircraft electrical system, it should be determined that
- Aonly locknuts have been used for terminal attachment to the studs.
- Bthe terminal studs are anchored against rotation.
- Conly plain nuts and lockwashers have been used for terminal attachment to the studs.
- Doutput voltage must be maintained at a constant value.
61El APU posee como backup para encendido:
- A"Bateria y Bomba de Combustible de DC"
- BBateria del Avion
- CHMG
- DIDG
62El APU proporciona al avión:
- APotencia Neumática
- BPotencia Eléctrica
- CPotencia Hidráulica
- D"Potencia Neumática y
Eléctrica"
63El avión se puede alimentar eléctricamente externamente por medio de:
- AAPU
- BGPU (Ground Power Unit)
- CArrancador Neumatico.
- DArrancador Eléctrico.
64El control del correcto funcionamiento de la C.S.D. lo observamos en la cabina en los siguientes indicadores:
- AFrecuencimetro del generador asociado a la CSD, Luces indicadoras de CSD, Relé de la Barra de Alterna
- BRelé de la barra directa – Frecuencimetro del generador asociado a la CSD – Luces indicadoras de CSD
- CTermómetro de temperatura de aceite – Frecuencimetro del generador asociada con la CSD – Luces indicadoras de CSD
- DFrecuencimetro del generador asociado con la CSD – Luces indicadoras de CSD- Regulador de voltaje
65El generador de corriente alterna del tipo sin escobillas no necesita ningún tipo de conexión eléctrica, entre la parte giratoria y no giratoria del mismo, debido a:
- ALa ley de Lenz
- BLa ley de Ampere
- CLa ley de Faraday
- DLa ley de Coulomb
66El generador del Avion genera con una frecuencia de:
- A60hz
- B50hz
- C120hz
- D400hz
67El reparto de la carga reactiva de cada generador es controlado por:
- AEl relé del generador
- BEl relé de la barra de enlace
- CEl regulador de voltaje
- DEl APU
68El sistema eléctrico del avión permite utilizar la batería en tierra para:
- AOperar los sistemas utilitarios
- BMantener la temperatura de cabina.
- CMantener el sistema de combustible encendido siempre
- DMantener la presión de la cabina.
69Electric circuits are protected from overheating by means of
- Athermocouples.
- Bshunts.
- Cfuses.
- Dcadmium-plated steel.
70Electric wiring installed in aircraft without special enclosing means (open wiring) offers the advantages of ease of installation, simple maintenance, and reduced weight. When bundling open wiring, the bundles should
- Abe limited as to the number of cables to minimize damage from a single electrical fault.
- Binclude at least one shielded cable to provide good bonding of the bundle to the airframe.
- Cbe limited to a minimum bend radius of five times the bundle diameter to avoid excessive stresses on the cable insulation.
- DSupport the bundle to structure and/ or solid fluid lines to prevent chafing damage.
71En el regulador de voltaje del sistema eléctrico utilizado normalmente en los generadores encontramos las siguientes partes:
- AP.M.G, circuito de detección, circuito amplificador, circuito de detección y detector de error
- BG.C.U, circuito de detección, circuito amplificador, circuito de detección y detector de error
- CFuente de alimentación, G.C.U, circuito amplificador, circuito de detección y detector de error
- DFuente de alimentación, circuito amplificador, circuito de detección y detector de error
72Entre las componentes del inversor de tipo estático tenemos:
- AFiltro de armónicos, etapa de control, cilindro de control, retardo de encendido, excitador de potencia y red de filtro
- BSensor de corriente, etapa de control, cilindro de control, retardo de encendido, excitador de potencia y red de filtro
- CGenerador de onda cuadrada, etapa de control, conformador de pulsos, retardo de encendido, excitador de potencia y red de filtro
- DFiltro de armónicos, sensor de potencia, conformador de pulsos, retardo de encendido, etapa de control y red de filtro
73Generalmente de las Barras de DC se conectan:
- ASistemas básicos del avión
- BSistemas esenciales y de emergencia
- CSistemas poco importantes
- DSistemas Obsoletos
74Grounding is electrically connecting a conductive object to the primary structure. One purpose of grounding is to
- Aprevent current return paths.
- Ballow static charge accumulation.
- Cprevent development of radio frequency potentials.
- Dpush-pull-type circuit breakers only (no switches).
75How are generators rated?
- AWatts at rated voltage.
- BAmperes at rated voltage.
- CThe impedance at rated voltage.
- DCurrent.
76How can the direction of rotation of a dc electric motor be changed?
- AInterchange the wires which connect the motor to the external power source.
- BReverse the electrical connections to either the field or armature windings.
- CRotate the positive brush one commutator segment.
- Delectrical or mechanical interconnections are provided so that the anticollision light will operate at all times that the position light switch is in the ON position.
77How does the routing of coaxial cables differ from the routing of electrical wiring?
- ACoaxial cables are routed parallel with stringers or ribs.
- BCoaxial cables are routed at right angles to stringers or ribs.
- CCoaxial cables are routed as directly as possible.
- DCoaxial wires
78How is a shunt-wound dc generator connected?
- AOne field is shunted across the other.
- BBoth fields are shunted across the armature.
- CThe field and armature are shunted with a capacitor.
- Da synchronous electric motor.
79How should a voltmeter be connected?
- AIn series with the source.
- BIn parallel with the load.
- CIn series with the load.
80If a wire is installed so that it comes in contact with some moving parts, what protection should be given the wire?
- AWrap with soft wire solder into a shield.
- BWrap with friction tape.
- CPass through conduit.
- Dwrapping with plastic.
81If any one generator in a 24-volt dc system shows low voltage, the most likely cause is
- Aan out-of-adjustment voltage regulator.
- Bshorted or grounded wiring.
- Ca defective reverse current cutout relay.
- Da stepdown transformer and a rectifier.
82If it is necessary to use an electrical connector where it may be exposed to moisture, the mechanic should
- Acoat the connector with grease.
- Buse a special moisture- proof type.
- Cspray the connector with varnish or zinc-chromate.
- Dcombined resistance and current-carrying capacity.
83If one switch is used to control all navigation lights, the lights are most likely connected
- Ain series with each other and parallel to the switch.
- Bin series with each other and in series with the switch.
- Cparallel to each other and in series with the switch.
- Dparallel with the switch
84If several long lengths of electrical cable are to be installed in rigid conduit, the possibility of damage to the cable as it is pulled through the conduit will be reduced by
- Adusting the cable with powdered graphite.
- Bdusting the cable with powdered soapstone.
- Capplying a light coat of dielectric grease.
- Dprevent development of radio frequency potentials.
85If the (+) terminal of a voltmeter is connected to the (-) terminal of the source voltage and the (-) terminal of the meter is connected to the (+) terminal of the source voltage, the voltmeter will read
- Acorrectly.
- Blow voltage.
- Cbackwards.
- Dparallel.
86If the IDG scavenge oil filter is contaminated with chunks or pieces of metal
- Achange the oil at 25 hour intervals.
- B"remove and replace the IDG."
- C"replace the oil and filter at 25 hour intervals."
- Doil spray.
87If the positive field lead between a generator and a generator control panel breaks and is shorted while the engine is running, a voltmeter connected to generator output would indicate
- Azero voltage.
- Bresidual voltage.
- Cnormal voltage.
- DHight voltage
88In aircraft electrical systems, automatic reset circuit breakers
- Acircuits each pole can complete through the switch.
- Bare useful where only temporary overloads are normally encountered.
- Cmust be used in all circuits essential to safe operation of the aircraft.
- Dshould not be used as circuit protective devices.
89In an ac circuit with no phase lead or lag, which is true?
- AReal power is zero.
- BReal power is greater than apparent power.
- CReal power equals apparent power.
- DBoth fields are shunted across the armature.
90In installations where the ammeter is in the generator or alternator lead, and the regulator system does not limit the maximum current that the generator or alternator can deliver, the ammeter can be redlined at what percent of the generator or alternator rating?
- A50
- B75
- C100
- D125
91In the American Wire Gauge (AWG) system of numbers used to designate electrical wire sizes, the number assigned to a size is related to its
- Acombined resistance and current-carrying capacity.
- Bcurrent-carrying capacity.
- Ccross-sectional area.
- Dshould not be used as circuit protective devices.
92In troubleshooting an electrical circuit, if an ohmmeter is properly connected across a circuit component and some value of resistance is read,
- Athe component has continuity and is open.
- Beither the component or the circuit is shorted.
- Cthe component has continuity and is not open.
- Dcircuit breaker activation.
93Integrated drive generators (IDG) employ a type of high output ac generator that utilizes
- A"brushes and slip rings to carry generated dc exciter current to the rotating field.
- B"battery current to excite the field.
- Ca brushless system to produce current.
- Deither the component or the circuit is shorted.
94La batería cumple como función
- ASuplir las necesidades básicas eléctricas del avión en caso de falla.
- BMantener los motores encendidos
- CMantener la Navegación del Avión
- DPoder encender los radios de VHF
95La característica principal de un sistema eléctrico de corriente A.C. con generadores aislados es que:
- AEl sistema solo funciona con A.C.
- BEl voltaje de alterna solamente es de 115/200v a 400 CPS
- CLa corriente de directa se obtiene únicamente a partir de inversores
- DNo permite que corriente proveniente de dos o más fuentes distintas se mezclen en una sola baRRA
96"La corriente AC en el avion se convierte en DC por medio de:"
- ACapacitores
- B"TRUs (Transformer Rectifier Units)"
- CDiodos
- DDensímetros
97"La corriente DC del Avion se convierte a AC por medio de:"
- A"TRUS (Transformer Rectifier Unit)"
- BDiodos
- CInversores
- DCapacitores
98La corriente de arranque de un motor ambobinado en serie, al pasar a través de ambos embobinados, el del campo y el de la armadura, produce una
- ATorsión baja de arranque.
- BVelocidad un poco mayor cuando no tiene carga.
- CTorsión alta de arranque.
- DLa frecuencia y el voltaje deben ser ambos iguales.
99La misión principal del panel de control de barras es: El control del correcto funcionamiento de la C.S.D. lo observamos en la cabina en los siguientes indicadores:
- AControlar el exceso de carga
- BControlar el bajo voltaje
- CControlar el relé del generador
- DDetección de barra sin corriente
100La unidad hidráulica de la C.S.D encontramos:
- AEje portador, unidad fija, unidad variable, cilindro de control, diferencial de engranajes y planetarios
- BUnidad hidráulica variable, unidad hidráulica fija, diferencial de engranajes y planetarios.
- CUnidad hidráulica variable, unidad hidráulica fija, eje portador de entrada y un cilindro de control
- DUnidad hidráulica variable, un sistema de gobierno de velocidad y un cilindro de control
101Los aviones para atender sus demandas de energía eléctrica utilizan básicamente los siguientes tipos de corriente:
- ACorriente alterna 115/200 voltios a 400 c.p.s., corriente alterna 28 voltios y corriente continua a 28 voltios
- BCorriente alterna 115/200 voltios a 400 c.p.s., corriente alterna 28 voltios y corriente continua trifásica a 28 voltios a 400 c.p.s.
- CCorriente alterna 115/200 voltios a 400 c.p.s., corriente alterna 28 voltios y corriente continua monofásica a 28 voltios
- DCorriente alterna 115/200 voltios a 400 c.p.s., corriente alterna 28 voltios y corriente continua bifásica a 28 voltios
102Los generadores del avión, generalmente se encuentran ubicados en:
- ALos motores
- BEn el sistema Neumático
- CEn el sistema hidráulico
- DEn los alojamientos de los trenes de aterrizaje
103Oil canning of the sides of aluminum or steel electrical junction boxes is considered to be
- Anormal operation in vibration prone areas.
- Ba shorting hazard.
- Cacceptable operation.
- DStructural.
104One advantage of using ac electrical power in aircraft is
- Athat ac electrical motors can be reversed while dc motors cannot.
- Bgreater ease in stepping the voltage up or down.
- C"that the effective voltage is 1.41 times the maximum instantaneous voltage; therefore, less power input is required."
- Drectifiers which use the aircraft's ac generators as a source of power.
105Para que el relé de salida del generador se cierre deben cumplirse dos condiciones:
- A"Que se ponga el interruptor correspondiente de cabina en ON y que lo permita el panel de control"
- B"Que se ponga el interruptor correspondiente de cabina en RESET y que lo permita el panel de control"
- CQue lo permita el panel de control y que el APU este disponible
- DQue lo permita el panel de control y que la EXTERNAL POWER este disponible
106Residual voltage is a result of magnetism in the
- Afield windings.
- Bfield shoes.
- Carmature.
- Dan integral fan.
107Si un generador está equipado con un regulador de voltaje de tipo vibrador, el único momento en que los puntos del vibrador permenecen abiertos
- ALa potencia de salida del motor pueda ser controlada de mas cerca.
- BEstá controlado por la separación (clearance) de los puntos del relay de corte de corriente inversa.
- CEs aumentada cuando la carga externa es mayor que la salida del generador.
- DDepende en la carga que lleva el generador.
108Terminales de alambre eléctrico para la mayoría de las aplicaciones de aeronaves deben ser del tipo
- ARanurado.
- BGancho.
- CAnillo.
- DObturado
109The circuit breaker in the instrument lighting system protects the
- Alights from too much current.
- Bwiring from too much current.
- Cinverters which use the aircraft's ac generators as a source of power.
- Dwiring from too much voltage.
110The generator rating is usually found stamped on the
- Afirewall.
- Bgenerator.
- Cengine.
- DEnergy
111The inductor-type inverter output voltage is controlled by the
- Anumber of poles and the speed of the motor.
- Bvoltage regulator.
- Cdc stator field current.
- Dresistance of the generator field circuit.
112The major advantages of alternating current (AC) over direct current (DC) is the fact that its current and voltage can easily be increased or decreased
- Aby means of a inverter.
- Bby means of a rectifier.
- Cby means of a transformer.
- Dbe removed from the generator housing.
113The most common method of attaching a pin or socket to an individual wire in an MS electrical connector is by
- Acrimping.
- Bsoldering.
- Ccrimping and soldering.
- DRolling
114The most common method of regulating the voltage output of a compound dc generator is to vary the
- Acurrent flowing through the shunt field coils.
- Btotal effective field strength by changing the reluctance of the magnetic circuit.
- Cresistance of the series field circuit.
- DRotate the positive brush one commutator segment.
115The nominal rating of electrical switches refers to continuous
- Acurrent rating with the contacts open.
- Bvoltage rating with the contacts closed.
- Ccurrent rating with the contacts closed.
- Dthe system voltage and cable length.
116The overvoltage control automatically protects the generator system when excessive voltage is present by
- Aopening the shunt field circuit.
- Bopening and resetting the field control relay.
- Cbreaking a circuit to the trip coil of the field control relay.
- Dincreasing the output of the low generator to equal the output of the high generator.
117The pin section of an AN/MS connector is normally installed on
- Athe power supply side of a circuit.
- Bthe ground side of a circuit.
- C"either side of a circuit (makes no difference)."
- Dresistance in the rotor windings.
118The poles of a generator are laminated to
- Areduce flux losses.
- Bincrease flux concentration.
- Creduce eddy current losses.
- Dan infinitely variable mechanical gearing system.
119The primary considerations when selecting electric cable size are
- Acurrent-carrying capacity and allowable voltage drop.
- Bthe voltage and amperage of the load it must carry.
- Cthe system voltage and cable length.
- Dinput voltage must be maintained at a constant value.
120The purpose of a rectifier in an electrical system is to change
- Athe frequency of alternating current.
- Bdirect current to alternating current.
- Calternating current to direct current.
- DReal power is zero.
121The strength of the core of an electromagnet depends upon the material from which it is constructed and which of the following?
- AThe number of turns of wire in the coil and the applied voltage.
- BThe number of turns of wire in the coil and the amount of current (amperes) passing through the coil.
- CThe size (cross section) and the number of turns of wire in the coil and the applied voltage.
- Dresistance in the generator output circuit.
122The three kinds of circuit-protection devices used most commonly in aircraft circuits are
- Acircuit breakers, resistors, and current limiters.
- Bcircuit breakers, fuses, and current limiters.
- Ccircuit breakers, capacitors, and current limiter plug-ins mechanical reset types.
- Dwrapping with electrical tape.
123The voltage in an ac transformer secondary that contains twice as many loops as the primary will be
- Agreater and the amperage less than in the primary.
- B"greater and the amperage greater than in the primary."
- Cless and the amperage greater than in the primary.
- Dby means of a rectifier.
124The voltage output of an alternator may be regulated by controlling the
- Aspeed of the alternator.
- Bvoltage output of the dc exciter.
- Cresistance in the rotor windings.
- Ddusting the cable with powdered soapstone.
125To help minimize radio interference a capacitor will largely eliminate and provide a steady direct current if the capacitor is connected to the generator in
- Aparallel.
- Bseries.
- Cseries/parallel.
126Un propósito de la puerta de inducidos (growler test) es para determinar la presencia de
- AUn conmutador con deformación circunferencial.
- BUn cable de campo roto.
- CUna armadura en corto.
- DRanurado.
127What is a method used for restoring generator field residual magnetism?
- AFlash the fields.
- BReseat the brushes.
- CEnergize the armature.
- Dshow very low resistance if it is a series field coil.
128What is an important factor in selecting aircraft fuses?
- AThe current exceeds a predetermined value.
- BThe voltage rating should be lower than the maximum circuit voltage.
- CCapacity matches the needs of the circuit.
- Dgreater ease in stepping the voltage up or down.
129What is normally used to bond noncontinuous stainless steel aircraft components?
- AStainless steel jumpers.
- BCopper jumpers.
- CAluminum jumpers.
- DIron steel copper
130What is the advantage of a circuit breaker when compared to a fuse?
- ANever needs replacing.
- BAlways eliminates the need of a switch.
- CResettable and reusable.
- DIt breaks circuit quickly.
131What is the advantage of a current limiter?
- AIt breaks circuit quickly.
- BIt can be reset easily.
- CIt will take overload for a short period.
- DAlways eliminates the need of a switch.
132What is the frequency of an alternator dependent upon?
- AVoltage.
- BRPM.
- CCurrent.
- DWatts
133What is the maximum amount of time a circuit can be in operation and still be an intermittent duty circuit?
- AThree minutes.
- BTwo minutes.
- COne minute.
- DTen minutes
134What is the purpose of the selection of derated switches for known continuous load current applications?
- ATo calculate the voltage drop across the circuit.
- B"To prevent short circuits in the motor field windings."
- CTo obtain reasonable switch efficiency and service life.
- DThe current exceeds a predetermined value.
135What is the ratio of turns between the primary coil winding and the secondary coil winding of a transformer designed to triple its input voltage?
- APrimary will have one- third as many turns as its secondary.
- BPrimary will have twice as many turns as its secondary.
- CPrimary will have three times as many turns as its secondary.
- DBoth fields are shunted across the armature.
136"What is the voltage drop for a No. 18 copper wire 50 feet long to carry 12.5 amperes, continuous operation? Use the formula VD = RLA VD = Voltage drop R = Resistance per ft = .00644 L = Length of wire A = Amperes"
- A1/2V.
- B1V.
- C4V.
- D2V.
137What kind of switch should you install in a single wire circuit that required the switch to be manually held in the ON position?
- ASingle-pole, single-throw (SPST), two-position normally open (NO).
- B"Single-pole, single-throw (SPST), single-position."
- CSingle-pole, double-throw (SPDT), single-position normally open (NO).
- D"Dual-pole, single-throw (DPST), single-position."
138What protection to wires and cables does conduit provide when used in aircraft installations?
- AElectromagnetic.
- BMechanical.
- CStructural.
- DChemical
139When adding a rheostat to a light circuit to control the light intensity, it should be connected in
- Aparallel with the light.
- Bseries with the light.
- Cseries parallel with the light switch.
- Dparallel with the switch
140When considering an alteration, the criteria upon which the selection of electric cable size should be based are
- Aapplied voltage and allowable voltage drop.
- Bcurrent-carrying capacity and allowable voltage drop.
- Ccurrent-carrying capacity and applied voltage.
- DThe current exceeds a predetermined value.
141When dc generators are operated in parallel to supply power for a single load, their controls include an equalizer circuit to assure that all generators share the load equally. The equalizer circuit operates by
- Aincreasing the output of the low generator to equal the output of the high generator.
- B"decreasing the output of the high generator to equal the output of the low generator."
- Cincreasing the output of the low generator and decreasing the output of the high generator until they are equal.
- Dtotal effective field strength by changing the reluctance of the magnetic circuit.
142"When necessary during operation, CSD disconnect is usually accomplished by"
- Aa switch in the cockpit.
- Bcircuit breaker activation.
- Ca shear section in the input shaft.
- Dthe component has continuity and is not open.
143When using an ohmmeter to check the continuity of a generator field coil, the coil should
- Abe removed from the generator housing.
- Bshow high resistance when the meter prods are connected to the terminals of the coil.
- Cshow very low resistance if it is a series field coil.
- Dopening the shunt field circuit.
144When using the voltage drop method of checking circuit resistance, the
- Ainput voltage must be maintained at a constant value.
- Boutput voltage must be maintained at a constant value.
- Cinput voltage must be varied.
- Dthe voltage and amperage of the load it must carry.
145Where electric cables must pass through holes in bulkheads, formers, ribs, firewalls, etc., the wires should be protected from chafing by
- Awrapping with electrical tape.
- Busing a suitable grommet.
- Cwrapping with plastic.
- Dwiring from too much voltage.
146Which of the following copper electrical cable sizes should be selected to replace a No. 6 aluminum electrical cable?
- ANo. 4.
- BNo. 6.
- CNo. 8.
- DNo. 10.
147Which of the following must be accomplished when installing an anticollision light?
- AInstall a switch independent of the position light switch.
- BUse shielded electrical cable to assure fail-safe operation.
- CConnect the anticollision light to the aircraft position light switch.
- DThe number of turns of wire in the coil and the applied voltage.
148Which of the following should be accomplished in the installation of aircraft wiring?
- ASupport the bundle to structure and/ or solid fluid lines to prevent chafing damage.
- BProvide adequate slack in the wire bundle to compensate for large changes in temperature.
- CLocate the bundle above flammable fluid lines and securely clamp to structure.
- Donly plain nuts and lockwashers have been used for terminal attachment to the studs.
149Which statement relating to electric wiring is true?
- AWhen attaching a terminal to the end of an electric cable, it should be determined that the strength of the cable-to- terminal joint is at least twice the tensile strength of the cable.
- Belectrical unit in the circuit and should be located as close to the source as possible.
- C"All electric cable splices should be covered with soft insulating tubing (spaghetti) for mechanical
protection against external abrasion." - DWhen attaching a terminal to the end of an electric cable, it should be determined that the strength of the cable-to- terminal joint is at least equal to the tensile strength of the cable itself.
150Why are the iron cores of most induction coils laminated?
- ATo reduce the core reluctance.
- BTo increase the core permeability.
- CTo reduce the effects of eddy currents.
- DEnergize the armature.
Información
- Descripción
- SIMULADOR EXAMEN DE LICENCIA TLA PARA COLOMBIA SISTEMAS ELECTRICOS
- Idioma
- Español
- Visitas
- 140
- Etiquetas
- Valoración
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