Airframe Systems and Components (Electrical Systems) Flashcards
Purpose of a circuit breaker?
Check the circuits and wires from fire.
Purpose of a circuit breaker?
Check the circuits and wires from fire.
What are the two principles operate?
Thermal and magnetic
what tool is used to measure the size of unmarked electrical wire?
wire gauge
what are the colors of aircraft position lights and where are they mounted?
green - Right
Red- left
White - rear facing
what are the factors to be considered when selecting wire size for electrical power?
Lower ball power loss on the line, permissible voltage drop in the line, and current carrying ability of the conductor.
type of breakers are not acceptable for a user in aircraft?
Auto- reset breakers
what is a slow blow fuse?
Use that compensates for surges and high inrush current but not blowing for several milliseconds.
What are the three most common falls that occur in an electrical circuit?
Open, short, low power
what size electrical conduit should we use for a specific cable bundle?
The conduit should have an inside diameter that is 25% larger than max diameter of the conductor bundle.
What color insulator on a solderless connectors proper 310 gauge wire?
yellow
should electrical switch is typically be oriented in the on position?
up or forward
when should electrical switches be D rated from their normal current rating?
DC motor circuits, which draw several times are rated current during starting. For a high rush in circuit such as landing lights.
When do DC electric motors draw several times they’re rated current?
During starting
what would cause an AC electrical motor to run too fast?
Excessive supply of voltage or the motor field winding shorted
what would cause an AC electric or motor to run to slow?
Low applied voltage, defective wiring, or no lubrication.
How is the output voltage of an alternator controlled?
By using a voltage regulator to control the exciter field current.
What should be checked before any aircraft electrical load is increased?
Associated wires, conductors and circuit protection devices that should be checked to determine that the new load will not exceed the rated limits of these units.
What is the main advantage of using AC for aircraft electrical power systems?
More easy to step up or down power which leads to less weight needed for circuitry.
In AC power systems how is DC obtained for charging battery?
AC is changed to direct current by use of a rectifier
what warns pilots of overheating batteries?
Thermal sensor in the battery and a light in the cockpit
how long should bonding jumper wires be made?
Marginal to handle all the current flow and short as possible to prevent increasing resistance.
What are the two items that we’re on a starter generator?
Brushes and commutator
what powers the ELT?
integrated battery
