Alternators & AVR

Which of the following is not a part of brushless alternator?

• Stator Windings

• AVR

• Slip rings

• Rotating rectifier assembly

RMF stands for (a)   .

In a brushed alternator, brushes should contact

• stator

• rotor

• commutator

• All the above

In a 3 phase machine, windings should be placed at ___________ degrees.

• 90

• 180

• 270

• 120

The initial excitation available in an alternator while starting is due to

• fully charged batteries

• AVR

• Governor

• residual magnetism

calculate the frequency of a 8 pole alternator rotated at 900 rpm

(a)  

AVR provides supply to ________________.

• Main stator winding

• Exciter stator winding

• Main rotor winding

• Exciter rotor winding

What is the name of an electrical device that only allows current flow in one direction. Otherwise known as a electrical check valve?

• Fuse

• Diode

• Photocell

• Multi-meter

Based on the image above, which statement is true? (Mark all that are true)

• The input supply is Alternating Current

• The output voltage is Positive voltage

• The input supply is Positive Only

• The output supply is Direct current

Which of these equipment is not used to test alternator windings?

• Odometer

• Multimeter

• Megger

• Continuity tester