30 Questions
What is the function of the pump mentioned in the text?
Supplying hydraulic pressure to a hydraulic motor
What is the purpose of the Quick Attach/Detach (QAD) adapter in most CSDs?
Allowing quick removal and replacement of the generator and CSD assembly
Where is the generator mounted in an Integrated Drive Generator (IDG)?
On the aft face of the CSD
What is the role of the CSD in converting engine rpm to alternator input speed?
Containing hydraulic trim units and a differential assembly
Why does an Integrated Drive Generator (IDG) help reduce weight and size?
Combining both the generator and CSD into one unit
What does a Quick Attach/Detach (QAD) adapter allow for a defective generator CSD?
Quick line repair of an aircraft
What is one factor that determines the voltage output of a generator?
The strength of the field current
How does decreasing the resistance in the field coil circuit affect the generator output?
Increases the output voltage
Why is it easier to turn the armature when the magnetic field is weaker?
Because less force is required
What happens to the generator output when the resistance in the field circuit is increased?
Output voltage decreases
How does controlling the field current affect a generator's output voltage?
It directly controls the output voltage
What happens to the magnetic field when more current flows through the field coils?
Magnetic field becomes stronger
What is the purpose of the reverse current cut-out relay in a generator circuit?
To disconnect the battery from the generator when the generator voltage drops below battery voltage
What could happen if the reverse current cut-out relay is not used in a generator circuit?
The battery could discharge through the generator
Why is a certain minimum value of load current necessary for the current limiter to vibrate?
To start the cycle of generator voltage and current rise
What happens when C2 opens in the line?
R2 is placed in series with the generator field
Why does reducing the output voltage lead to a reduction in generator current?
To decrease the field current
How is the voltage regulator actuated in relation to line voltage?
It is actuated by line voltage
What is the purpose of a rectifier circuit?
To convert alternating current into direct current
In a transformer rectifier unit, what is the typical AC input voltage?
115-V AC
What component is commonly used in rectifier circuits to allow current flow in one direction?
Diodes
How is a tap defined in a transformer winding?
As a connection made at some point between the ends of the winding
What is the primary function of a transformer rectifier unit (TRU)?
To convert AC power into DC power
Why are multiple tappings or secondaries present in some transformers?
To provide different voltages higher or lower than the supply voltage
What will happen if the current limit of a fusing link is exceeded?
The fusing link will melt or blow
In a cartridge fuse, what material encloses the fuse link along with metal ferrules at each end?
Glass, Bakelite, or fibre tube filled with insulating powder
How does a slow-blow fuse differ from a fast-blow fuse?
It introduces a time factor and limits current flow
What does a current limiter protect against in aircraft power distribution systems?
Hard faults
Why are current limiters not subject to the nuisance tripping encountered with fuses?
Due to their long time constant and overload capability
What should be used to replace a fuse in an electrical system?
A fuse with the same voltage and current rating
Test your knowledge on the Quick Attach/Detach (QAD) adapter in constant speed drives (CSDs) of turbine aeroplanes. Questions cover the function and importance of QAD adapter in maintaining AC frequency and facilitating generator and CSD assembly replacements.
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