Unt 4 Flashcards
Which alternator component offers a slight magnetic force that aligns the main magnetic field so it remains most effective?
Interpoles
Which alternator component helps the generator maintain a stable voltage under varying load conditions?
Damping windings
What types of cores do most exciters use that retain residual magnetism?
Soft iron
What does a voltage regulator sense if it decreases the current to the exciter field windings causing the magnetic field to get weaker?
An increase in the voltage level
Which type of alternator consists of a rotating mutagenic field and single set of stator coils?
Single phase
Which alternator configuration has three legs that all connect in the middle?
Wye
What is the multiplier you use to determine the line voltage if you know the phase voltage?
1.73
Which alternator configuration has no neutral that is common to all three phases?
Delta
In a rotating rectifier test, what does it indicate if a diode has a low reading in both directions?
Shorted
Which test instrument do you use when testing the main rotor leads?
Multimeter set to ohms
Which component is used with a voltmeter for a three-phased alternator to save money?
Selector switch
Which meter indicates the true power load in an alternating current (AC) circuit?
Wattmeter
On the power factor meter, what will an inductive load cause?
Current to lag voltage
What devices provide variable amounts of resistance to provide a circuit with different levels of output?
Rheostats
When you inspect the voltage regulator vibration dampeners, look for
cracking and deterioration
