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Module 3 Ch 4/18 Generation of Electricity.

EASA Part 66 Module 3 Book Electricity Fundamentals Ch 4/18 Overall rating: ★★★★☆ 4.4 based on 392 reviews
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Chapters 

Chapter 1/18 : Electron Theory (page 1.1 to 1.6).
Chapter 2/18 : Static Electricity and Conduction (page 2.1 to 2.8).
Chapter 3/18 : Electrical Terminology (page 3.1 to 3.8).
Chapter 4/18 : Generation of Electricity (page 4.1 to 4.4).
Chapter 5/18 : DC Sources of Electricity (page 5.1 to 5.10).

 

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EASA Part 66 Module 3 Electrical Fundamentals Question Exam

Sample          –  Electrical Exams ( 40 questions 30 min),
Category A   –  Electrical Exams ( 20 questions 25 min),
Category B1 –  Electrical Exams ( 52 questions 65 min),
Category B2Electrical Exams ( 52 questions 65 min),
Category B3Electrical Exams ( 24 questions 30 min),

Module 3: Electrica...
 

Module 3: Electrical Fundamentals

Easa part 66 discussion Module 3: Electrical Fundamentals
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SOURCES OF ELECTRICITY
Electrical energy can be produced in a number of methods. The four most common are pressure, chemical, thermal, and light.

PRESSURE SOURCE This form of electrical generation is commonly known as piezoelectric (piezo or piez taken from Greek: to press; pressure; to squeeze) is a result of the application of mechanical pressure on a dielectric or nonconducting crystal. The most common piezoelectric materials used today are crystalline quartz and Rochelle salt. However, Rochelle salt is being superseded by other materials, such as barium titanate.

The application of a mechanical stress produces an electric polarization, which is proportional to this stress. This polarization establishes a voltage across the crystal. If a circuit is connected across the crystal a flow of current can be observed when the crystal is loaded (pressure is applied). An opposite condition can occur, where an application of a voltage between certain faces of the crystal can produce a mechanical distortion. This effect is commonly referred to as the piezoelectric effect.

THERMAL SOURCES The most common source of thermal electricity found in the aviation industry comes from thermocouples. Thermocouples are widely used as temperature sensors. They are cheap and interchangeable easa atpl books pdf, have standard connectors, and can measure a wide range of temperatures. Thermocouples are pairs of dissimilar metal wires joined at least at one end, which generate a voltage between the two wires that is proportional to the temperature at the junction. This is called the Seebeck effect, in honor of Thomas Seebeck who first noticed the phenomena in 1821. It was also noticed that different metal combinations have a different voltage difference. Thermocouples are utilized in aviation as ways to measure cylinder head temperatures, inter-turbine temperature and exhaust gas temperature easa atpl books pdf.

LIGHT SOURCES A solar cell or a photovoltaic cell is a device that converts light energy into electricity. Fundamentally, the device contains certain chemical elements that when exposed to light energy, they release electrons. Photons in sunlight are taken in by the solar panel or cell easa atpl books pdf.