lesson #2 reviewer Insulation, Wire Shielding and Substitution

What instrument is used to measure insulation resistance without damaging the insulation?

• Voltmeter
• Ohmmeter
• Megohmmeter
• Ammeter

What is the term for the ability of insulation to resist current leakage over its surface?

• Dielectric strength
• Conductance
• Insulation resistance
• Capacitance

Dielectric strength refers to the insulation's ability to withstand:

• High temperature
• Moisture exposure
• Mechanical damage
• Potential difference

Shielding is used primarily to eliminate:

• Power loss
• Resistance
• Electromagnetic interference
• Voltage drop

Which cable type has two inner conductors in a twisted pair?

• Coaxial
• Triaxial
• Twinaxial
• Quadraxial

Which of the following cables provides the highest interference rejection?

• Coaxial
• Triaxial
• Twinaxial
• Quadraxial

What is a unique feature of triaxial cables compared to coaxial cables?

• Twisted pair conductors
• Double shielding layers
• Fiber optic core
• Single insulator

Where is SWAMP wiring most likely to be found in an aircraft?

• Flight deck
• Cargo hold
• Passenger cabin
• Wheel wells

If no approved wire substitution is found in the maintenance manual, what should be done next?

• Use the closest available wire
• Consult a licensed technician
• Contact the Original Aircraft Manufacturer
• Skip the replacement

What is the recommended shielding coverage percentage for effective EMI protection?

• 50%
• 60%
• 75%
• 85%