ACM-170 FINAL EXAM Flashcards
(28 cards)
Which type of voltage regulator is used on heavy-duty aircraft?
carbon pile
What prevents the battery from driving the motor as a starter?
reverse current
How does the voltage regulator control current?
by regulating the voltage into the field coils
What are 2 functions of the field frame of the generator?
- Complete magnetic circuit between poles
- Act as mechanical support for other parts
To replace a copper wire with aluminum wire?
2 sizes larger
What is the smallest aluminum wire permitted?
8
What is the standard for wire gauges?
AWS
Why is aluminum preferred over copper wire?
In an alternator how many degrees apart?
120°
What do you use to seat brushes?
000 sandpaper
How do you convert AC to DC?
rectifier
How is AC produced in a DC alternator?
rectify the DC
How many diodes are in a rectifier?
6
What happens when you use a growler with a hacksaw?
vibrates
Schematics show location of components how?
in relation to each other
What is the difference between DPST / SPST switches?
1 Current
2 currents
What is the maximum resistance in a bonding strap?
.003
How is the inadvertenint operation of a switch protected?
guarded
What is a bonding strap tested for?
resistance
How you figured the derated factor on a switch?
multipy the factor by 10
What does a bonding strap do?
creates a path in case of a short
prevents arcing
How much slack should you have in a wire bundle?
1/2”
Where do you run wiring in relation to fluid lines?
above
What type of bulb is used on a strobe?
xenon
