21-09. ELECTRICS
Всего заданий: 238
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Заданий на экзамен: 25
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1. A transformer with 2.400 windings on the primary coil shall give 28 VAC output from the secondary coil when 115 VAC is connected to the primary coil. How many windings are needed on the secondary coil?
2. If AC generators are connected in parallel, the reactive loads are balanced by:
3. Static dischargers: 1) are used to set all the parts of the airframe to the same electrical potential. 2) are placed on wing and tail tips to facilitate electrical discharge. 3) are used to reset the electrostatic potential of the aircraft to a value approximating 0 volts. 4) are located on wing and tail tips to reduce interference with the on-board radiocommunication systems to a minimum. 5) limit the risks of transfer of electrical charges between the aircraft and the electrified clouds. The combination regrouping all the correct statements is:
4. What is the formula for the ideal transformator?
5. If a 24 V secondary cell battery has 20 cells and one cell is dead:
