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As air is delivered into the ductwork, pressure builds and forces air out of all of the openings in the various ductwork connections or through the seams and joints of the furnace or air-conditioner. The tighter the ductwork system (e.g. fewer holes), the less air is needed from the fan to create a change in the ductwork pressure.
Traditional air conditioners run using alternating current, and hence, any direct-current solar power needs to be inverted to be compatible with these units. New variable-speed DC-motor units allow solar power to more easily run them since this conversion is unnecessary, and since the motors are tolerant of voltage fluctuations associated with ...
New tools have been developed to help plumbers fix problems more efficiently. For example, plumbers use video cameras for inspections of hidden leaks or other problems; they also use hydro jets, and high pressure hydraulic pumps connected to steel cables for trench-less sewer line replacement.
On August 7, 2018, an aircon leak caused the inside of a MRTC 3000 class train to flood, prompting passengers inside to open their umbrellas. The train was removed from service to fix the air conditioning unit and the train involved in the incident returned to service the following day.
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Isolation valves temporarily disconnect part of a piping system to allow maintenance or repair, for example. Isolation valves are typically left in either a fully open or closed position. A given isolation valve may be in place for many years without being operated but must be designed to be readily operable whenever needed, including for ...
It infected millions of computers worldwide within a few hours of its release. It is considered to be one of the most damaging worms ever. It originated in the Philippines; made by an AMA Computer College student Onel de Guzman for his thesis. September: Computer hacker Jonathan James became the first juvenile to serve jail time for hacking.
The inmates dancing to "Thriller" in their YouTube video. Thriller is a viral video featuring the CPDRC Dancing Inmates of a high-security penitentiary.In 2007, the inmates of Cebu Provincial Detention and Rehabilitation Center (CPDRC), a maximum security prison in Cebu, the Philippines, imitated the zombie dance featured in the music video of Michael Jackson's "Thriller".