30 Questions
What is the purpose of the charge pump in the hydraulic system?
Supply filtered oil to various components in the hydraulic system
How does clockwise rotation of the adjustment screw affect the system frequency?
Increases the frequency
Where is the transmission scavenge pump located in the hydraulic circuit?
Between the transmission sump and scavenge filter
What happens if unstable and erratic frequencies occur in the system?
They cannot be corrected by governor adjustment
How does counter-clockwise rotation of the adjustment screw impact system frequency?
Decreases the frequency
What is the function of the generator scavenge pump in the hydraulic circuit?
Picks up generator cooling and lube oil
What is the function of the hot battery bus in an aircraft?
Supplies power directly to critical loads
Which bus system supplies power to essential lighting, flight control systems, and communication systems in an aircraft?
AC essential bus
What type of systems are typically powered by the non-essential buses in an aircraft?
Galley power and non-essential lighting
Which of the following is a common name for the non-essential buses in an aircraft?
Shed buses
During partial generator system failure, what happens to non-essential systems in an aircraft?
They are isolated (turned off)
Which bus system is connected to the aircraft battery?
Essential DC bus
What component is responsible for providing a clean DC voltage to the 400 Hz oscillator in a static inverter?
Capacitors
Which component in a static inverter ensures that the correct voltage and frequency are maintained?
Regulator circuit
What is the purpose of the harmonic filter in a static inverter?
Remove everything that is not 400 Hz
What role does the pulse shaper and power driver play in a static inverter?
Produce a 400 Hz square wave
Why should static inverters be sent to approved facilities for repair?
To properly handle required repair work
How do transformers allow AC voltage and current values to be changed?
By using a common core
What is the purpose of a fuse in an aircraft power distribution system?
To limit current flow
Which material is commonly used as an insulating material in a cartridge fuse?
Glass
What happens when the current limit of a fusing link is exceeded?
The fusing link melts or blows
In what scenario might a current limiter be more suitable than a fast-blow fuse?
During short, high-current faults
What characteristic sets a current limiter apart from a fast-blow fuse?
It has a slower time to open than a fast-blow fuse
Why should a fuse be replaced with one of the same voltage and current rating?
To maintain the system's safety and integrity
What is the purpose of the body or case of a fuse?
To hold the fuse together
Which material can the body or case of a fuse be made of?
Glass
What are the basic components of a fuse's physical construction?
Body or case, mounting, fuse link
Which type of fuse is designed for use in areas where a spark from a blowing fuse could be a hazard?
Ceramic fuse
What purpose does the mounting of a fuse serve?
To form the electrical connection to the circuit
Which part of a fuse 'breaks' the circuit when predefined limits are exceeded?
'Fuse link'
Test your knowledge on the aircraft governor adjustment system, which controls the frequency by adjusting the valve stem position and charge oil flow. Learn about the effects of clockwise and counter-clockwise rotation of the adjustment screw.
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