7.7 Flashcards
When should wiring checks be carried out on an aircraft?
A) Only when a component or LRU failure occurs
B) When a defect is outside of a component/LRU failure
C) After every flight, regardless of any defect
b
What is the purpose of testing new wiring circuits after installation?
A) To check the aircraft’s weight distribution
B) To ensure system integrity and reliability
C) To verify the colour coding of the wires
b
Which of the following is NOT typically included in wiring checks?
A) Voltage testing
B) Visual inspection
C) Insulation resistance testing
a
What must be done after completing all wiring tests?
A) The aircraft must be powered up immediately
B) Connections must be rechecked, tools removed, and functional checks performed
C) A voltage test should be carried out while the circuit is powered
b
What is the purpose of continuity testing?
A) To verify that electrical connections match the wiring diagram
B) To measure the amount of current flowing in a circuit
C) To check for voltage drops across components
A
In what order is continuity testing normally performed?
A) After the bonding test and before the insulation test
B) Before the bonding test and insulation test
C) Only after insulation resistance testing is completed
a
What equipment is typically used for a continuity test?
A) A voltmeter
B) A multimeter set to the ohms range
C) An ammeter
b
What additional feature does a digital multimeter provide when set to continuity test mode?
A) It can beep to indicate continuity
B) It displays voltage levels
C) It generates power for the circuit
a
Why must power never be applied to a circuit while performing a continuity test?
A) It can damage the meter and/or injure personnel
B) It will give an inaccurate resistance reading
C) It will cause the circuit to shut down permanently
a
When performing continuity tests on an aircraft with a metal fuselage, what is an acceptable return path for the tester?
A) A grounded external power supply
B) The airframe
C) A separate, insulated wire
b
What instrument is used to measure the resistance of a circuit component?
A) A voltmeter
B) An ohmmeter
C) An ammeter
b
Which of the following components can be tested for serviceability using an ohmmeter?
A) Fuses, lamps, relays, sensors, and contactors
B) Only fuses and relays
C) Only sensors and lamps
A
What does a continuity test confirm?
A) There is an electrical link between designated points and the resistance is within the specified value
B) The circuit is completely free of resistance
C) The voltage supply is operating correctly
a
What type of testing ensures that no unintended electrical connections exist within a circuit?
A) Voltage drop testing
B) Insulation resistance testing
C) Current flow testing
b
When should a bonding test be performed in relation to continuity testing?
A) Before continuity testing
B) After continuity testing
C) Only if a continuity test fails
a
What is the primary purpose of bonding testing?
A) To ensure that conductive parts of the aircraft are properly connected to reduce electromagnetic interference
B) To measure the voltage of a circuit
C) To check the power output of a circuit breaker
a
