Electrical Machines Action Commutator Online Exam Quiz
Electrical Machines Action Commutator GK Quiz. Question and Answers related to Electrical Machines Action Commutator. MCQ (Multiple Choice Questions with answers about Electrical Machines Action Commutator
For a four pole, 16 slot armature with two coil-side/slot having wave connected progressive winding has single turn coils. The commutator pitch for the machine should be ________
Options
A : 1
B : -1
C : +1 and 1
D : none of the mentioned
For a four pole, 16 slot armature with two coil-side/slot having lap connected progressive winding has single turn coils. Then number of commutator segment is?
Options
A : 16
B : 32
C : 4
D : 8
Commutator action is analogous to _________ in analog electronics.
Options
A : full wave rectifier
B : half wave rectifier
C : comparator
D : amplifier
The brushes in dc machine are normally placed electrically in interpolar region to ________
Options
A : make an angle of 90 deg. electrical
B : make an angle of 90 deg. mechanical
C : make an angle of 0 deg. electrical
D : none of the mentioned
Operation of a dc machine will ________
Options
A : not be affected by commutating poles
B : be affected by commutating poles
C : be affected significantly upto 30% spread of commutating poles
D : none of the mentioned
What is Inductive kick?
Options
A : reactance voltage in commutator segments
B : reactance voltage in shorted commutator segments
C : impulsive voltage in commutator segments
D : none of the mentioned
What is Commutator?
Options
A : rotating segment to which brushes are attached
B : stationary segment to which rotating brushes are attached
C : rotating segment to which rotating brush segment is attached
D : any of the mentioned
Inductive kick causes ________
Options
A : sparking at the brushes of the machine
B : similar problems when neutral phase shift takes place in the armature
C : large current to flow in the equalizer rings
D : none of the mentioned
Under commutation results ________
Options
A : sparking at the trailing edge of brush
B : sparking at the leading edge of brush
C : sparking at the middle of brush
D : any of the mentioned
The armature rotation in the dc machine and the magnetic field are independent of each other and obey laws of conservation of energy.
Options
A : True
B : False
C :
D :
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