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2. Hand pump - Wikipedia

   en.wikipedia.org/wiki/Hand_pump

   There are many different types of hand pump available, mainly operating on a piston, diaphragm or rotary vane principle with a check valve on the entry and exit ports to the chamber operating in opposing directions. Most hand pumps are either piston pumps or plunger pumps, and are positive displacement. [1]

3. Workplace exposure monitoring - Wikipedia

   en.wikipedia.org/wiki/Workplace_exposure_monitoring

   Detector tubes are available for over 300 gases, vapors, and aerosols in air, with each tube specific for one or a few chemicals. Air may be passed through the tube with a hand pump or powered air pump for spot measurements, or by diffusion for long-term measurements. The chemical concentration is generally determined by the length of the color ...

4. Pump - Wikipedia

   en.wikipedia.org/wiki/Pump

   A small, electrically powered pump A large, electrically driven pump for waterworks near the Hengsteysee, Germany. A pump is a device that moves fluids (liquids or gases), or sometimes slurries, [1] by mechanical action, typically converted from electrical energy into hydraulic or pneumatic energy.

5. Firefighting apparatus - Wikipedia

   en.wikipedia.org/wiki/Firefighting_apparatus

   Hand squirts and hand pumps are noted before Ctesibius of Alexandria invented the first fire pump circa the 2nd century B.C., [3] and an example of a force-pump possibly used for a fire-engine is mentioned by Heron of Alexandria. The fire pump was reinvented in Europe during the 16th century, reportedly used in Augsburg in 1518 and Nuremberg in

6. Glossary of firefighting equipment - Wikipedia

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

   A Variable Speed (VFD) Fire Pump Controller is a fire pump controller that is able to vary the speed of the motor depending on the demand of the fire pump, resulting in the ability to hold a constant discharge pressure. Ventilation saw A high-powered saw with metal-cutting teeth or disc for quickly making large openings in roofing materials.

7. Drilling fluid - Wikipedia

   en.wikipedia.org/wiki/Drilling_fluid

   Low pH (acidic) aggravates corrosion, so use corrosion coupons [clarification needed] to monitor corrosion type, rates and to tell correct chemical inhibitor is used in correct amount. A corrosion coupon is a small piece of metal exposed to the process so to evaluate the effect the corrosive conditions would have on other equipment of similar ...