Electric Flashcards
What is the purpose of the selection of derated switches for known continuous load current applications?
To obtain reasonable switch efficiency and service life.
If one switch is used to control all navigation lights, the lights are most likely connected
parallel to each other and in series with the switch.
(8819) A series-wound
DC electric motor
will normally require
more current at low RPM than at
high RPM.
(8890) When considering an alteration, the criteria upon which the selection of electric cable size should be based are
current-carrying capacity and allowable voltage drop.
(8965) The rotor in a Magnesyn remote indicating system uses
permanent magnet.
What does a rectifier do?
Changes alternating current into direct current.
How should the splices be arranged if several are to be located in an electrical
wire bundle?
Staggered along the length of the bundle.
The basic difference between an autosyn and a magnesyn indicating system is the
Rotor
What is required when operating two aircraft AC generators in parallel?
Frequency and voltage must both be equal.
How is a shunt-wound DC generator connected?
Both fields are shunted across the armature.
The strength of the core of an electromagnet depends upon the material from which it is constructed and which of the following?
The number of turns of wire in the coil and the amount of current (amperes) passing through the coil.
The purpose of a rectifier in an electrical
system is to change
alternating current to direct current.
The circuit breaker in the instrument lighting system protects the
wiring from too much current.
Microswitches are used primarily as limit switches to
control electrical units automatically.
The pole pieces or shoes used in a DC generator are a part of the
field assembly.
circuit protection device called a current limiter is essentially a slow-blow fuse and is designed to be used in
heavy power circuits.
Which type of DC generator is not used as an airplane generator?
Series wound.
One purpose of a growler test is to determine the presence of
a shorted armature.
(8917) An aircraft electrical circuit control relay is
an electronically operated switch.
How does the magnetic brake used to stop rotation of an electric motor armature operate?
A friction brake is applied by a spring and released by a magnet.
Circuits that must be operated only in an emergency or whose inadvertent activation
I could endanger a system
frequently employ
guarded switches.
When a diode is checked for an open circuit or a short circuit, it should be
disconnected from the circuit.
Integrated drive generators (IDG) employ a type of high output AC generator that utilizes
brushless system to produce current.
A voltage regulator controls generator output by
varying current flow to generator field coll.
