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Fragen in diesem Quiz (20)
1Which 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.
2What 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.
3The 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.
4When 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
5The 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.
6The 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.
7When 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.
- Bdecreasing 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.
8What is the purpose of the selection of derated switches for known continuous load current applications?
- ATo calculate the voltage drop across the circuit.
- BTo prevent short circuits in the motor field windings.
- CTo obtain reasonable switch efficiency and service life.
- DThe current exceeds a predetermined value.
9The 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.
10Which 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.
11When 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.
12When 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.
13Integrated drive generators (IDG) employ a type of high output ac generator that utilizes
- Abrushes and slip rings to carry generated dc exciter current to the rotating field.
- Bbattery current to excite the field.
- Ca brushless system to produce current.
- Deither the component or the circuit is shorted.
14Cuando 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
15If 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.
16f 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
17If 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
- Ain the normal direction and through the shunt field opposite the normal direction.
- Band the shunt field opposite the normal direction.
- CCentrifugal 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.
18A 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.
- Ddecreasing the output of the high generator to equal the output of the low generator.
19Bonding connections should be tested for
- Aresistance value.
- Bamperage value.
- Creactance.
- DAlternator
20The 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.
Informationen
- Beschreibung
- Quiz am Refuerzo, erstellt von Angie Bolaños am 13/06/2016.
- Autor
- Angie Bolaños
- Sprache
- Español
- Aufrufe
- 0
- Verlauf
- Erstellt am 13 Jun 2016 · aktualisiert am 20 Jun 2016
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