Basic Aircraft Maintenance: Electrical Fundamentals
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Questions and Answers

Which source of electricity involves the movement of charged particles?

  • Light sources
  • Magnetism and motion (correct)
  • Friction
  • Chemical reactions

    • What is the primary function of a photovoltaic cell?

  • To convert light energy into electrical energy (correct)
  • To convert thermal energy into electrical energy
  • To store electricity for later use
  • To amplify electrical signals

    • Which material is commonly used in solar cells to absorb light?

  • Lead
  • Silicon (correct)
  • Aluminum
  • Copper

    • What generates electricity in thermocouples?

    <p>The combination of two dissimilar metal wires</p> Signup and view all the answers

    Which of the following methods is NOT a common source of electricity?

    <p>Compression</p> Signup and view all the answers

    What effect is described by the generation of voltage due to temperature differences at a junction of two materials?

    <p>Seebeck Effect</p> Signup and view all the answers

    Which statement best describes the holes generated in a photovoltaic cell?

    <p>They are the absence of electrons that create positive charges.</p> Signup and view all the answers

    What is the main outcome of understanding the mathematical formulae in relation to aircraft maintenance?

    <p>Capacity to combine and apply knowledge logically</p> Signup and view all the answers

    Which category must a Level 3 applicant demonstrate advanced knowledge for?

    <p>Category B1 or B2</p> Signup and view all the answers

    What is the primary application of thermocouples in the aviation industry?

    <p>Measuring temperature</p> Signup and view all the answers

    What phenomenon occurs when electric current passes through two different materials, creating a temperature difference?

    <p>Peltier Effect</p> Signup and view all the answers

    Which of the following is NOT an objective of Level 2 knowledge?

    <p>Ability to prepare detailed sketches from memory</p> Signup and view all the answers

    Which effect relates the generation of electricity and heat exchange due to a thermal gradient?

    <p>Thomson Effect</p> Signup and view all the answers

    Which of the following accurately distinguishes the Thomson effect from the Seebeck and Peltier effects?

    <p>Thomson effect requires only one material.</p> Signup and view all the answers

    What is a primary application of thermocouples in aviation?

    <p>To monitor cylinder head temperatures.</p> Signup and view all the answers

    The process of generating electricity through friction typically involves what?

    <p>An imbalance of charges.</p> Signup and view all the answers

    What is the basic principle behind piezoelectric materials?

    <p>They establish voltage with mechanical stress.</p> Signup and view all the answers

    Which materials are commonly associated with piezoelectric properties?

    <p>Crystalline quartz and Rochelle salt.</p> Signup and view all the answers

    What occurs when mechanical pressure is applied to a piezoelectric crystal?

    <p>It produces an electric polarization.</p> Signup and view all the answers

    Which of the following is an example of a device that uses piezoelectric materials?

    <p>Microphones.</p> Signup and view all the answers

    The potential difference generated in piezoelectric materials is a result of what factor?

    <p>Mechanical pressure.</p> Signup and view all the answers

    What causes one terminal of a battery to develop a positive charge?

    <p>The chemical reaction that frees more electrons in one metal than the other.</p> Signup and view all the answers

    Which statement differentiates a fuel cell from a battery?

    <p>A battery converts chemical energy stored inside, whereas a fuel cell uses external supplies.</p> Signup and view all the answers

    What is induced current?

    <p>Current generated when a conductor is moved through a magnetic field.</p> Signup and view all the answers

    What occurs when a magnet is moved quickly near a coil?

    <p>The galvanometer needle moves, indicating current flow.</p> Signup and view all the answers

    What is a primary battery primarily composed of?

    <p>Two different metals in a chemical solution.</p> Signup and view all the answers

    Study Notes

    GMR Aero School of Aviation

    Basic Aircraft Maintenance Training Manual

    • Issue 03, Dated 01 Jul 2024
    • For training purposes only
    • Pages: 1–13

    Module 3: Electrical Fundamentals

    • Submodule 3.4: Generation of Electricity

    Table of Contents

    • Foreword
    • Copyright Notice
    • Basic Knowledge Requirements
    • Knowledge Levels – Category A, B1, B2, B3 and C Aircraft Maintenance Licence
      • Level 1
      • Level 2
      • Level 3
    • Abbreviations
      1. Sources of Electricity
      • 1.1 Light Sources
      • 1.2 Heat Sources
      • 1.3 Friction
      • 1.4 Pressure Source
      • 1.5 Chemical Reaction
      • 1.6 Magnetism and Motion

    Basic Knowledge Requirements

    • Study Notes comply with DGCA Regulation, CAR-66 (Appendix I) and EASA Regulation (EU) No. 1321/2014, Annex (Part-66) Appendix I
    • Associated Knowledge Levels specified
    • Objectives and levels for generation of electricity, production using various methods (light, heat, friction, pressure, chemical action, magnetism, and motion)
    • Knowledge Levels – Category A, B1, B2, B3, and C aircraft maintenance licence

    1. Sources of Electricity

    • Electrical energy produced by various methods: light, heat, friction, pressure, chemical reaction, magnetism, and motion

    1.1 Light Sources

    • Photovoltaic cells convert light energy directly into electricity
    • Photovoltaic effect releases electrons, generating electricity

    1.2 Heat Sources

    • Thermocouples, widely used temperature sensors
    • Different metal combinations produce different voltage differences

    1.3 Friction

    • Static electricity builds up from rubbing non-conductive materials
    • Electron transfer creates charge imbalance, discussed in sub-module 02

    1.4 Pressure Sources

    • Piezoelectric effect generates electricity from mechanical pressure on dielectric crystals (e.g., quartz, Rochelle salt, barium titanate)
    • Polarization proportional to stress; voltage across crystal
    • Used in transducers, microphones, and loudspeakers

    1.5 Chemical Reactions

    • Batteries and fuel cells convert chemical energy into electricity
    • Primary batteries use chemical reactions between metals and solutions
    • Fuel cells use external chemical fuel sources
    • Diagram of fuel cell (Figure 12) and battery (Figure 10)

    1.6 Magnetism and Motion

    • Moving conductor through magnetic field generates electromotive force (EMF) and current flow
    • Induced current (examples and diagrams using galvanometer needle and magnet movement (Figure 13))

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    Related Documents

    Basic Aircraft Maintenance Training Manual PDF 2024

    Description

    This quiz is based on Module 3 of the Basic Aircraft Maintenance Training Manual. It focuses specifically on the generation of electricity and its various sources relevant to aviation. Prepare to test your knowledge on electrical fundamentals necessary for aircraft maintenance and compliance with DGCA and EASA regulations.

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