Dc Machines Armature Winding Commutator Online Exam Quiz
Dc Machines Armature Winding Commutator GK Quiz. Question and Answers related to Dc Machines Armature Winding Commutator. MCQ (Multiple Choice Questions with answers about Dc Machines Armature Winding Commutator
Coil span for 4-pole, 12-slot armature winding is_______
Options
A : 24
B : 48
C : 8
D : 3
For a 2-pole DC machine with coil span equal to 6, what are the number of commutator segments?
Options
A : 3
B : 12
C : 4
D : 8
In a DC machine, how coil-side emf varies towards the outer side of poles?
Options
A : Decreases
B : Remains same
C : Increases
D : First increases the decreases
What is the difference of DC voltages in the adjoining Brushes?
Options
A : Depends on the Shaft speed
B : Zero
C : Non-zero
D : Depends on the various other parameters
What is the effect of armature coils at points where brushes are located?
Options
A : Induces positive emf
B : Induces negative emf
C : Induces zero emf
D : Depends on the speed of rotor
What is the nature of the coils when YCS value is non-integral?
Options
A : Long-pitched
B : Medium-pitched
C : Short-pitched
D : Can’t be determined by YCS value
When coil sides are pole pitch apart, the DC armature winding is called as ___________
Options
A : Multiplex
B : Fractional-pitch
C : Full-pitch
D : Pole-pitch
As the armature rotates, the number of coils in series tapped by the brush pairs_________
Options
A : Remains same
B : Increases
C : Decreases
D : Depends on rotor speed and direction of torque
Armature winding is mounted on a __________
Options
A : Stator
B : Rotor
C : Can be mounted anywhere on stator or rotor
D : Not required
Commutator performs rectification so that output of the machine is unidirectional.
Options
A : True
B : False
C :
D :
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