38 Questions
What component receives power from the DC bus through the fuel shut-off valve circuit breaker?
Fuel control relay
What is the main function of an aircraft bus?
Supply electrical power to various components
How do circuit breakers protect aircraft electrical circuits?
By preventing short circuits
In the example used, what percentage switch energises the ignition relay?
16%
What advantage do circuit breakers have over fuses?
Circuit breakers can be reset once the fault is rectified
Where is the ignition relay usually located?
In the equipment compartment in the engine nacelle
Which type of circuit breaker is most commonly found in aircraft?
White collar breaker
Which part of the automatic engine starting control system is referred to as 'the heart'?
Speed sensitive control
What is the purpose of an engine ignition system in relation to the aircraft bus?
Supply ignition power from the DC bus
What advantage do circuit breakers have over fuses based on the text provided?
Circuit breakers can be easily reset without replacement
What is the purpose of a continuous duty cycle ignition system in an aircraft?
To offer continuous engine relight capability during critical flight manoeuvres
What is the main advantage of using a circuit breaker rather than a fuse in an aircraft ignition system?
Reusability after tripping
Which type of ignition system is typically equipped in gas turbine engines?
Dual high energy ignition system
In an aircraft, what components make up a typical ignition system?
Ignition leads, igniter plugs, fuel control relay
How do AC and DC igniter systems differ in terms of components?
Operating voltages only
Which component is responsible for controlling the flow of electrical power in an aircraft?
Circuit breakers
What is a key advantage of circuit breakers over fuses in aircraft electrical systems?
Circuit breakers can be reset after tripping
Which type of aircraft bus is typically used to distribute DC and AC power throughout an aircraft?
DC/AC aircraft bus
What are the two main types of duty cycles associated with ignition systems?
Intermittent duty cycle, continuous duty cycle
Which device is designed to protect an electrical circuit from excess current?
Circuit breakers
What is a key advantage of circuit breakers over fuses in aircraft systems?
Circuit breakers provide a more convenient and quick way to reset after an overload
What are some common types of circuit breakers used in aircraft systems?
Thermal, magnetic, and manual reset
Which component of an ignition system is responsible for interrupting the primary current when a circuit breaker is activated?
Circuit breaker relay
In an aircraft system, what is the purpose of an aircraft bus?
To provide power distribution to various aircraft components
What is the primary function of circuit breakers in an aircraft ignition system?
To protect the ignition system from electrical overload
What is the function of the trembler contacts in a DC HEIU?
To vibrate rapidly and open/close the primary circuit
What is the purpose of the reservoir capacitor in the DC HEIU system?
To store voltage until it reaches the breakdown value of the discharge gap
In an aircraft, what is the primary function of a circuit breaker?
To protect aircraft electrical circuits from overloads
What type of circuit breaker is commonly found in aircraft systems?
Thermal circuit breaker
In the context of aircraft systems, what advantage do circuit breakers have over fuses?
Circuit breakers can be reset after tripping
What is the purpose of the relight switch in the aircraft cabin?
To supply DC voltage directly to the HEIU for re-ignition
What does an igniter lead connect in relation to the High Energy Ignition Unit (HEIU)?
Connects the igniter plug to the HEIU
What voltage can the High Energy Ignition Unit (HEIU) be supplied with according to the text?
Both DC and AC voltage
In what scenario does an engine continue to rotate during an in-flight flame-out?
When there is still fuel flow and an ignition source is present
What component of an aircraft bus system is crucial for supplying power to various aircraft systems?
Bus voltage
What differentiates a circuit breaker from a fuse?
Circuit breakers can be reset after overload whereas fuses must be replaced
Which type of circuit breaker is commonly found in aircraft due to their ability to interrupt large currents?
Magnetic circuit breaker
What is a significant advantage of using a circuit breaker over a fuse in an aircraft electrical system?
'Fast-acting' circuit breakers offer quicker protection against overloads than fuses
Explore the ignition system circuit in aircraft electrical systems, focusing on the distribution of electrical power to components. Learn about the DC/AC aircraft bus and the engine ignition system.
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