时间：2011-03-11 23:11来源：蓝天飞行翻译 作者：admin 点击：次
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Charging a lead-acid battery is done by passing direct current of the correct voltage and polarity through the battery. When the electricity flows through the battery, the lead sulfate on the positive plate changes into lead peroxide, and the lead sulfate on the negative plate changes into pure lead. The electrolyte takes on a heavier concentration of sulfuric acid, its specific gravity increases. charging current (battery charging). The direct current forced through the secondary cells of a battery to charge them. Charging current restores the active material on the plates to a condition that allows them to change chemical energy into electrical energy. charging stand (air conditioning service equipment). A compact arrangement of air conditioning servicing equipment. A charging stand contains a vacuum pump, a manifold gage set, and a method of measuring and dispensing the refrigerant. Charles’s law. The basic gas law that describes the relationship between the temperature and the volume of a gas. Charles’s law states that if the pressure of the gas is held constant and its absolute temperature is increased, the volume of the gas will also increase. chart (engineering data). A graphic presentation that shows the way the value of one variable changes with variations in other variables. A chart allows a person to visualize the way a change in one action affects other actions. chart (navigation). A special map used for aerial navigation that gives the location and all information necessary about the aids to navigation. A chart also shows the grids of latitude and longitude and provides a surface for plotting courses and locating fixes. charted VFR flyways (air traffic control). Flight paths recommended for use to bypass areas heavily traversed by large turbine-powered aircraft. Pilot compliance with recommended flyways and associated altitudes is strictly voluntary. VFR Flyway Planning Charts are published on the back of existing VFR Terminal Area Charts. charted visual flight procedure approach (air traffic control). An approach conducted while operating on an instrument rules (IFR) flight plan which authorizes the pilot of an aircraft to proceed visually and clear of clouds to the airport via visual landmarks and other information depicted on a charted visual flight procedure. This approach must be authorized and under the control of the appropriate air traffic control facility. The weather minimums required are depicted on the approach chart. chase aircraft. An aircraft flown in proximity to another aircraft normally to observe its performance during flight testing. chassis (electronic equipment). The sheet metal frame inside a piece of electronic equipment on which components are mounted. chassis ground. An electrical reference point in a piece of equipment that is not connected to the earth ground. A chassis ground is also called a floating ground. chatter (hydraulic system malfunction). A type of rapid vibration of a hydraulic pump caused by the pump taking in some air along with the hydraulic fluid. |
