Block 4 Electrical Flashcards
When does electrical shock occur
When current passes through the human body
What health hazards are associated with electrical shock
Disrupts normal electrical functions
May stop heart and/or lungs causing injury or death
Why are load centers dangerous and what must be done to improve safety when working in one
High voltage areas, electrical power removed from aircraft and systems
What is Voltage and what is it measured in
Electrical force which causes current to flow in a circuit
Volts (V)
What is current and what is it measured in
Movement of electrical charge through a circuit
Amps (A)
What is resistance and how is it measured
Opposition to current in a circuit
Controls voltage or amperage in a circuit
Ohms (omega)
What is frequency and what is it measured in
One cycle of sine wave per second
Hertz (Hz)
What is the purpose of an electrical Bus
Distribution point of power in electrical systems
What generators are on the P8A
2 IDGs
1 APU generator
What are relays used for in electrical systems
Transfer and control power in electrical systems
What is the purpose of circuit breakers and what types are on the P8A
Circuit protection devices
Push pull type
Electronic
What type of batteries are on the P8A
Two NICAD 24 V
