Block 8 Electrical Flashcards
What effects can electric shock have on the body?
Disrupt the body’s normal electrical functions
Can stop the heart
Can stop the lungs
Or both causing severe injury or death.
When does an electrical shock occur?
When a current passes through the human body. The current will flow through the body’s nervous system or vascular system to the ground.
What is voltage and what are the types?
It is the electrical force of current measured in volts (v).
The two types are AC and DC.
What is Alternating Current Voltage?
Voltage that moves in both directions simultaneously. It’s the primary form of voltage used for most systems on the P-8A
What are the AC sources of power?
115 VAC is provided by: IDG's APU Generator External Power Static Inverter.
What is Direct Current Voltage and what is it primarily used for?
It is voltage that flows in one direction.
It’s primarily used for Emergency Backup Systems and systems essential to flight.
What are the DC sources of power?
Batteries and Transformer Rectifier Units.
What is Electrical current and what is it measured in?
It is the movement of electrical charge through a circuit.
It is measured in amperes (amps)
What is Resistance and what is it measured in?
It causes an opposition to the flow of electricity in a circuit.
It is measured in ohms. ,,
State Ohm’s Law
The current through a conductor between two points is directly proportional to the voltage across the two points.
I=V/R
What is Frequency and what is it measured in?
It’s the number of complete alterations per second of an AC circuit.
It is measured in Hertz.
What is an Electrical bus?
A central point at which either AC or DC voltage is distributed throughout multiple systems.
What are circuit breakers?
A push pull type, overcurrent protection device that is resettable.
What is a Fuse?
An overcurrent protection device that is for one time use only.
What is a Relay?
An electrically actuated switch used to control the distribution of electricity in a circuit.
