Outside work 1 and 2 Flashcards
What factor primarily dictates the maximum current that can be carried by a wire in an aircraft system?
The rated temperature of the wire’s insulation
What is the main purpose of using larger conductors in aircraft wiring despite the increased cost and weight?
To reduce the power loss in the line by minimizing resistance
Why is it important to identify wires with markings along their length in aircraft systems?
To ensure safety and ease of maintenance by providing clear circuit identification
When is it necessary to provide additional support for wire bundles smaller than size #20 in aircraft systems?
When the wire bundle is subjected to excessive vibration or frequent movement
What is the purpose of creating a drip loop in aircraft wire installations?
To trap fluids or condensation and prevent them from entering connectors or terminals
When should aluminum conductor wire be avoided in aircraft electrical systems?
In applications requiring frequent disconnection and reconnection
Why is it important to derate the current-carrying capacity of wires bundled into harnesses?
To account for the decreased air circulation and heat dissipation within the bundle
How should wire clamps be installed to prevent damage to aircraft wiring systems?
With attachment hardware positioned above the clamp to prevent rotation
Why must the radius of bends in wire groups or bundles not be less than 10 times the outside diameter of the largest wire?
To prevent excessive mechanical stress on the wire insulation
In the example provided, why is the voltage drop in the main power wires limited to 2 percent of the regulated voltage?
To ensure efficient power delivery and avoid excessive heat generation
When selecting wire sizes for high-temperature environments in aircraft, which consideration is most critical?
The wire’s insulation’s ability to withstand high ambient temperatures
What is the preferred method for marking wires in aircraft when direct marking is not possible?
Applying heat-shrinkable sleeves with printed identification marks
How is the correct wire size determined to prevent excessive voltage drop in a long wire run?
By calculating the voltage drop across the wire and choosing a gauge that meets the voltage drop limit
Why should wire bundles in aircraft installations not exceed 75 wires or 1.5 to 2 inches in diameter?
To reduce the risk of excessive heat buildup within the bundle
Which of the following factors is not a primary consideration when selecting the size of wire for aircraft electrical systems?
The flexibility of the wire to allow for easy installation
