Handbook for Electrical Engineers: A Reference Book for Practicing Engineers and Students of EngineeringHarold Pender, William Arthur Del Mar J. Wiley & Sons, Incorporated, 1922 - 2263 من الصفحات |
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عبارات ومصطلحات مألوفة
acid alternating current ammeter ampere-hour ampere-turns amperes anode approximately armature average battery boiler breaker cable capacity carbon cathode cell cent charge circuit coal coefficient coil condenser conductors connected constant copper cosh cost curve density diameter dielectric dielectric strength direct current direct-current direction discharge effect efficiency Elec electric electrodes electrodynamometer electrolyte electromotive force engine equal equation feet field flux formula frequency furnace galvanometer given heat horse-power increase inductance insulation iron lamps leakage length light load loss machine magnetic magnetomotive force maximum metal meter motor normal ohms operation phase pipe plate pole potential pounds power factor pressure ratio reactance resistance rheostat shunt sinh slots solenoid solution speed square inch standard steam steel surface switch temperature terminals Trans transformer tube unit usually velocity voltage volts watt-hour wattmeter weight winding wire
مقاطع مشهورة
الصفحة 9 - Root-Mean-Square or Effective Value. The square root of the mean of the squares of the instantaneous values for one complete cycle.
الصفحة 602 - As soon as the stronger solution is taken from the vessel containing the unfiltered neutralized stock solution, additional crystals and water must be added to the stock solution. An excess of cupric oxide shall always be kept in the unfiltered stock solution.
الصفحة 80 - Battery are, (1) the oxidation from a lower to a higher oxide of nickel in the positive plate, and (2) the reduction from ferrous oxide to metallic iron in the negative plate. The oxidation and reduction are performed by the oxygen and hydrogen set free at the respective poles by the electrolytic decomposition of water during the charge. The charging of the positive plate is, therefore, simply a process of increasing the proportion of oxygen to nickel. The...
الصفحة 214 - These pats, to satisfactorily pass the requirements, shall remain firm and hard and show no signs of distortion, checking, cracking, or disintegrating.
الصفحة 602 - The samples shall be cleaned before testing, first with carbona, benzine or turpentine and cotton waste (not with a brush), and then thoroughly rinsed in clean water and wiped dry with clean cotton waste. "The sample shall be clean and dry before each immersion in the solution.
الصفحة 132 - It is safe and advisable to use a double belt on a pulley 12 inches diameter or larger; a triple belt on a pulley 20 inches diameter or larger; a quadruple belt on a pulley 30 inches diameter or larger. As belts increase in width they should alsj l)e made thicker.
الصفحة 918 - The Load Factor of a machine, plant or system is the ratio of the average power to the maximum power during a certain period of time. The average power is taken over a certain period of time...
الصفحة 602 - ... e — Samples. Not more than seven wires shall be simultaneously immersed, and not more than one sample of galvanized material, other than wire, shall be immersed in the specified quantity of solution. The samples shall not be grouped or twisted together, but shall be well separated so as to permit the action of the solution to be uniform upon all immersed portions of the samples.
الصفحة 602 - Fahrenheit (reading the scale at the level of the solution) at the beginning of each test. In case the filtered solution is high in specific gravity, clean water shall be added to reduce the specific gravity to 1.186 at 65 degrees Fahrenheit.
الصفحة 918 - Diversity factor is the ratio of the sum of the maximum power demands of the subdivisions of any system or parts of a system to the maximum demand of the whole system or of the part of the system under consideration, measured at the point of supply.