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  2. Water pouring puzzle - Wikipedia

    en.wikipedia.org/wiki/Water_pouring_puzzle

    Water pouring puzzles (also called water jug problems, decanting problems, [1] [2] measuring puzzles, or Die Hard with a Vengeance puzzles) are a class of puzzle involving a finite collection of water jugs of known integer capacities (in terms of a liquid measure such as liters or gallons). Initially each jug contains a known integer volume of ...

  3. Gill (unit) - Wikipedia

    en.wikipedia.org/wiki/Gill_(unit)

    1 US gill ≡ 4 US fluid ounces ≡ ⁠ 1 / 32 ⁠ US gallon ≡ ⁠ 1 / 8 ⁠ US liquid quart ≡ ⁠ 1 / 4 ⁠ US liquid pint ≡ ⁠ 1 / 2 ⁠ US cup ≡ 8 US tablespoons ≡ 24 US teaspoons ≡ 32 US fluid drams: ≡ 118.29411825 mL [b] ≈ 4.163 3709 imperial fluid ounces: ≈ 0.026 0211 imperial gallons: ≈ 0.104 0843 imperial quarts ≈ ...

  4. Air lock - Wikipedia

    en.wikipedia.org/wiki/Air_lock

    Air lock problems often occur when one is trying to recommission a system after it has been deliberately (for servicing) or accidentally emptied. Take, for example, a central heating system using a circulating pump to pump water through radiators. When filling such a system, air is trapped in the radiators. This air has to be vented using screw ...

  5. Fire pump - Wikipedia

    en.wikipedia.org/wiki/Fire_pump

    A jockey pump, also known as a pressure-maintenance pump, is a small pump connected to a fire suppression system near the fire pump and is intended to maintain pressure in a fire protection piping system. These pumps recover pressures lost from gradual, slow pressure declines in a system due to temperature changes, trapped air escapement, or ...

  6. Quart - Wikipedia

    en.wikipedia.org/wiki/Quart

    The quart (symbol: qt) [1] is a unit of volume equal to a quarter of a gallon. Three kinds of quarts are currently used: the liquid quart and dry quart of the US customary system and the imperial quart of the British imperial system. All are roughly equal to one liter. It is divided into two pints or (in the US) four cups. Historically, the ...

  7. Gallon - Wikipedia

    en.wikipedia.org/wiki/Gallon

    The gallon is a unit of volume in British imperial units and United States customary units.. The imperial gallon (imp gal) is defined as 4.546 09 litres, and is or was used in the United Kingdom and its former colonies, including Ireland, Canada, Australia, New Zealand, India, South Africa, Malaysia and some Caribbean countries, while the US gallon (US gal) is defined as 231 cubic inches (3. ...

  8. Airlift pump - Wikipedia

    en.wikipedia.org/wiki/Airlift_pump

    1. air supply 2. liquid supply 3. air inlet port 4. air supply line 5. air port 6. air outlet 7. fluid intake 8. riser tube 9. air liquid mixture 10. pump outlet L: liquid, usually wastewater LL: liquid level V: Vessel G: Gravel or solids. An airlift pump is a pump that has low suction and moderate discharge of liquid and entrained solids. The ...

  9. Chain pump - Wikipedia

    en.wikipedia.org/wiki/Chain_pump

    The infamous Eastern Han court eunuch Zhang Rang (d. A.D. 189) once ordered the engineer Bi Lan (畢嵐) to construct a series of square-pallet chain pumps outside the capital city Luoyang. [14] These chain pumps serviced the palaces and living quarters of the Luoyang; the water lifted by the chain pumps was brought in by a pipe system. [14]