Aircraft Electrical System Maintenance
30 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What does the equalising coil do in each voltage regulator?

  • Strengthen or weaken the effect of the voltage coil (correct)
  • Increase the resistance in the ground lead
  • Control the generator output mechanically
  • Regulate the load current
  • How is load current shared equally among generators?

  • By increasing resistance in the ground lead
  • By regulating battery positive to the field winding
  • By using a solid-state voltage regulator
  • By controlling generator output voltages (correct)
  • What causes a potential difference between the negative terminals of generators?

  • Equalising coil strength
  • Regulator type
  • Presence of an equalising bus
  • Difference in load current (correct)
  • What is the purpose of the low-resistance shunt in the ground lead of each generator?

    <p>Create a potential difference between generators</p> Signup and view all the answers

    In which regulator type does the regulator control battery positive going to the field winding?

    <p>Grounded field type</p> Signup and view all the answers

    What is the function of the grounded regulator type in generators?

    <p>Controls battery ground to field winding</p> Signup and view all the answers

    What will happen if both generators become inoperative?

    <p>Essential AC loads will be supplied by the static inverter</p> Signup and view all the answers

    What is the purpose of the changeover relay between the no. 1 generator bus and the essential AC bus?

    <p>To supply essential AC loads with power from the static inverter</p> Signup and view all the answers

    What will happen if the system operates for a long period of time under certain conditions?

    <p>The battery will become discharged</p> Signup and view all the answers

    What happens when the circuit's battery relay is turned 'off'?

    <p>The aircraft operates on emergency DC power only</p> Signup and view all the answers

    Why is there confusion surrounding relays and solenoids in aircraft systems?

    <p>They are used interchangeably by aircraft manufacturers</p> Signup and view all the answers

    What are relays usually used for in aircraft systems?

    <p>Low-current switching applications</p> Signup and view all the answers

    What is used as a return path to the battery in aircraft electrical systems?

    <p>Metallic portion of the aircraft structure</p> Signup and view all the answers

    Which manuals provide reference to electrical power during aircraft maintenance?

    <p>Aircraft Maintenance Manual, The Wiring Diagrams Manual</p> Signup and view all the answers

    Which ATA chapters do transport aircraft maintenance manuals comply with for electrical power systems?

    <p>ATA 20 Standard Practices and ATA 24 Electrical Power</p> Signup and view all the answers

    What type of system do aircraft, almost without exception, use for electrical returns?

    <p>Negative-ground or single-wire earth return system</p> Signup and view all the answers

    What type of power does a typical large aircraft electrical power system make and supply?

    <p>AC and DC power</p> Signup and view all the answers

    What provides normal and emergency power in an aircraft's electrical system?

    <p>Standby AC and/or DC system</p> Signup and view all the answers

    What is the main function of the filter in a static inverter?

    <p>To provide a clean DC voltage to the 400 Hz oscillator</p> Signup and view all the answers

    Which component ensures that static inverters maintain the correct voltage and frequency?

    <p>Regulator circuit</p> Signup and view all the answers

    What is the purpose of the harmonic filter in a static inverter?

    <p>Removes everything that is not 400 Hz</p> Signup and view all the answers

    How do transformers allow the values of AC voltage and current to be changed?

    <p>Using mutual inductance</p> Signup and view all the answers

    What is responsible for conditioning the signal for use as a pure sine wave in a static inverter?

    <p>Harmonic filter</p> Signup and view all the answers

    Why should static inverters be sent to an approved facility for repairs?

    <p>To ensure the correct work is performed on them</p> Signup and view all the answers

    What is the main purpose of using current limiters in large aircraft?

    <p>To protect the aircraft's power distribution leads</p> Signup and view all the answers

    How does a circuit breaker differ from a fuse in terms of functionality?

    <p>A fuse destroys itself while a circuit breaker can be reset</p> Signup and view all the answers

    Which component houses the spring-biased moving magnetic core inside a magnetic circuit breaker?

    <p>Non-magnetic delay tube</p> Signup and view all the answers

    What happens to the core of a magnetic circuit breaker when the circuit's current exceeds the rated current?

    <p>The core moves towards the pole piece</p> Signup and view all the answers

    What does the armature do in a magnetic circuit breaker?

    <p>Links the contacts to the coil mechanism</p> Signup and view all the answers

    How does a magnetic circuit breaker respond to an increase in current above its rated level?

    <p>Magnetic field strength increases</p> Signup and view all the answers

    More Like This

    Aircraft Electrical System Maintenance
    30 questions
    Avionics Electrical Wiring Standards
    18 questions
    Aircraft Electrical Systems Maintenance
    5 questions
    Use Quizgecko on...
    Browser
    Browser