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  2. Permanent magnet motor - Wikipedia

    en.wikipedia.org/wiki/Permanent_magnet_motor

    Schematic of a permanent magnet motor using brushes and magnets in the stator. A permanent magnet motor is a type of electric motor that uses permanent magnets for the field excitation and a wound armature. The permanent magnets can either be stationary or rotating; interior or exterior to the armature for a radial flux machine or layered with ...

  3. ABC dry chemical - Wikipedia

    en.wikipedia.org/wiki/ABC_dry_chemical

    Dry chemical powder is used on all classes of fires. Dry chemical powder puts out the fire by coating the burning material with a thin layer of dust, thereby separating the fuel from the oxygen in the air. The powder also works to interrupt the chemical reaction of fire, so these extinguishers are extremely effective at putting out the fire.

  4. Glossary of firefighting equipment - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_firefighting...

    Classes of fire extinguisher and corresponding type of fire they extinguish. Claw tool Early striking and prying tool. Closed-circuit SCBA See SCBA. Closet hook Pike pole under 5 ft long Closet ladder See Attic ladder. CO 2 extinguisher Fire extinguisher that releases carbon dioxide gas to displace oxygen to smother and cool a fire, such as a ...

  5. Electropermanent magnet - Wikipedia

    en.wikipedia.org/wiki/Electropermanent_magnet

    An electropermanent magnet or EPM is a type of permanent magnet in which the external magnetic field can be switched on or off by a pulse of electric current in a wire winding around part of the magnet. The magnet consists of two sections, one of "hard" (high coercivity) magnetic material and one of "soft" (low coercivity) material. The ...

  6. Fire extinguisher - Wikipedia

    en.wikipedia.org/wiki/Fire_extinguisher

    The UK recognises six fire classes: [21] Class A fires involve organic solids such as paper and wood. Class B fires involve flammable or combustible liquids, including petrol, grease, and oil. Class C fires involve flammable gases. Class D fires involve combustible metals. Class E fires involve electrical equipment/appliances.

  7. NYT ‘Connections’ Hints and Answers Today, Saturday, December 14

    www.aol.com/nyt-connections-hints-answers-today...

    If you've been having trouble with any of the connections or words in Saturday's puzzle, you're not alone and these hints should definitely help you out. Plus, I'll reveal the answers further down

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