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  2. Pilot light - Wikipedia

    en.wikipedia.org/wiki/Pilot_light

    In natural gas furnaces, water heaters, and room heating systems, a safety cut-off switch is normally included so that the gas supply to the pilot and heating system is shut off by an electrically operated valve if the pilot light goes out. This cut-off switch usually detects the pilot light in one of several ways: A flame rectification device. [2]

  3. Water heating - Wikipedia

    en.wikipedia.org/wiki/Water_heating

    Two conflicting safety issues affect water heater temperature—the risk of scalding from excessively hot water greater than 55 °C (131 °F), and the risk of incubating bacteria colonies, particularly Legionella, in water that is not hot enough to kill them. Both risks are potentially life-threatening and are balanced by setting the water ...

  4. Tankless water heating - Wikipedia

    en.wikipedia.org/wiki/Tankless_water_heating

    A hybrid water heater is a water heating system that integrates technology traits from both the tank-type water heaters and the tankless water heaters. [5] It maintains water pressure and consistent supply of hot water across multiple hot water applications, and like its tankless cousins, it is efficient and can supply a continuous flow of hot ...

  5. Elon Musk - Wikipedia

    en.wikipedia.org/wiki/Elon_Musk

    Elon was an enthusiastic reader of books, later attributing his success in part to having read The Lord of the Rings, the Foundation series, and The Hitchhiker's Guide to the Galaxy. [11] [27] At age ten, he developed an interest in computing and video games, teaching himself how to program from the VIC-20 user manual. [28]

  6. Three Mile Island accident - Wikipedia

    en.wikipedia.org/wiki/Three_Mile_Island_accident

    The initial cause of the accident happened 11 hours earlier, during an attempt by operators to fix a blockage in one of the eight condensate polishers, the sophisticated filters cleaning the secondary loop water. These filters are designed to stop minerals and other impurities in the water from accumulating in the steam generators and to ...

  7. Timeline of United States inventions (1890–1945) - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_United_States...

    The block heater, first known as a head bolt heater, was invented in 1945 by Andrew Freeman in Grand Forks, North Dakota. Freeman used some scrap hoses and copper tubing onto the heating element of an old flat-iron and produced the first headbolt heater, which warmed the engine's water jacket and the oil film between cylinder heads and pistons.

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