Mechanical and Electrical Systems Overview
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Questions and Answers

What is electricity primarily generated from?

  • Mechanical energy alone
  • Solar power only
  • Wind energy solely
  • Friction, induction, or chemical change (correct)
  • Which component converts mechanical energy into electrical energy?

  • Generator (correct)
  • Turbine
  • Transformer
  • Battery
  • What type of turbine uses steam to generate mechanical energy?

  • Steam-driven turbine (correct)
  • Wind turbine
  • Water-driven turbine
  • Nuclear-reactor turbine
  • What is one function of solar photovoltaic cells?

    <p>Convert solar power into electricity</p> Signup and view all the answers

    Which statement correctly describes the role of turbines?

    <p>They convert various forms of energy into mechanical energy.</p> Signup and view all the answers

    What is required for a wind turbine to operate efficiently?

    <p>Wind speeds of at least 10 miles per hour</p> Signup and view all the answers

    What did Rudolf Diesel contribute to electricity production?

    <p>Internal combustion engine</p> Signup and view all the answers

    Which of the following is a source of static electricity?

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

    What does the term 'Ion' refer to in electrical terms?

    <p>An atom or molecule not electrically balanced.</p> Signup and view all the answers

    What is the standard unit of measuring the strength of the electrical current?

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

    What is the purpose of a circuit breaker?

    <p>To automatically stop the flow of current in an electric circuit.</p> Signup and view all the answers

    How is an Ampere-Hour (Ah) calculated?

    <p>By multiplying the current by the time in hours.</p> Signup and view all the answers

    Which of the following best describes Direct Current (DC)?

    <p>Current that flows in one direction, from negative to positive.</p> Signup and view all the answers

    What does frequency measure in electrical terms?

    <p>The number of cycles per second in hertz.</p> Signup and view all the answers

    What is the primary function of an inverter?

    <p>To convert direct current into alternating current.</p> Signup and view all the answers

    Which of the following materials is considered an insulator?

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

    Study Notes

    Mechanical and Electrical Systems

    • Mechanical and Electrical Systems (BU II) involves the study of building utility systems, focusing on electricity supply and mechanical equipment installation.
    • It's a crucial aspect of building design and technology.

    History of Electricity

    • 600 BC: Amber was discovered to become electrically charged when rubbed.
    • 1600 AD: William Gilbert described the electrification of various materials, becoming known as the "father of modern electricity."
    • 1660 AD: Otto von Guericke invented a crude static electricity generating machine.
    • 1729 AD: Stephen Gray differentiated between conductors and insulators. Charles DuFay identified two types of electricity: positive and negative.
    • 1752 AD: Benjamin Franklin and Ebenezer Kinnersley named the two types of electricity "positive" and "negative."
    • 1745 AD: Pieter van Musschenbroek invented the Leyden jar to store static electricity.
    • 1747 AD: William Watson discharged a Leyden jar through a circuit, initiating research on current and circuits.
    • 1827 AD: George Simon Ohm's law established the relationship between current, voltage, and resistance.

    Other Key Developments

    • 1841 AD: James Prescott Joule's law described electrical heating. Gustav Kirchhoff's rules are essential for circuit calculations
    • 1819 AD: Han Christian Oersted discovered the magnetic field around a current-carrying wire.
    • 1821 AD: André-Marie Ampère established electromagnetic laws and developed the electromagnet.
    • 1831 AD: Michael Faraday and Joseph Henry invented the electric generator, contributing to power generation. Hippolyte Pixii created a hand-powered generator model.
    • 1858 AD: The first steam-driven generator became operational.
    • 1878 AD: Charles Brush installed the first arc lights, and Joseph Swan developed the carbon filament lamp.
    • 1879 AD: Thomas Edison advocated for direct current (DC) and developed the first central electric power plant ("Pearl Street Plant") in 1882.
    • 1888 AD: Charles Parsons introduced the steam turbine to generate alternating current (AC).
    • 1893 AD: Nikola Tesla designed the first hydroelectric power station (Niagara Falls) that produced AC.
    • 1900 AD: Coal was the primary fuel for electricity production during the late 19th century.
    • 1950 AD: Natural gas and oil (from petroleum) became the leading clean-burning fuels for electricity generation. Nuclear power also began playing a role.

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    Description

    This quiz covers fundamental concepts of Mechanical and Electrical Systems, particularly in the context of building utility systems. It explores the history of electricity, highlighting significant milestones and contributions from notable figures in the field. Test your knowledge on both the technical and historical aspects of electrical systems in construction.

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