Study course for controlling officers examination: technical paper : telephone section 2
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Contents: secondary cells and batteries / alternating current theory / supplement: use of mathematical tables / alternating current theory (continued) / DC generators and motors: AC motors / AC/DC power rectifier sets: electrical measuring instruments / automatic voltage control / DC power and ringing distribution: filters / DC power plants / ringing and tone equipment / AC electric power / emergency power plants (part 1) / emergency power plants (continued) / air conditioning and ventilation / typical air-conditioning plant and equipment / fire protection
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