Dc Machines Interview Experienced Online Exam Quiz
Dc Machines Interview Experienced GK Quiz. Question and Answers related to Dc Machines Interview Experienced. MCQ (Multiple Choice Questions with answers about Dc Machines Interview Experienced
How many coil sets undergo commutation simultaneously in a wave winding?
Options
A : 1
B : 2
C : 4
D : 3
How many coils under an adjoining pole pairs is/are connected between adjacent commutator segments in lap winding?
Options
A : 1/2
B : 2
C : 1
D : 1/4
Which coil is shorted in commutation process?
Options
A : Coil under north pole
B : Coil under south pole
C : Coil lying in an interpolar region
D : Cannot be determined
Which of the following is different component?
Options
A : Commutating poles
B : Compoles
C : Interpoles
D : Compensating winding
For a DC machine, in a commutator ________
Options
A : Copper is harder than mica
B : Mica and copper are equally hard
C : Mica is harder than copper
D : Cannot be determined
The main function of interpoles in a loaded DC machine is to minimize _______between the brushes and the commutator.
Options
A : Friction
B : Sparking
C : Current
D : Wear and tear
The insulating material used between the commutator segments is normally _______
Options
A : Graphite
B : Paper
C : Air gap
D : Mica
To achieve spark less commutation brushes of a DC generator are placed ________
Options
A : just ahead of magnetic neutral axis
B : in magnetic neutral axis
C : just behind the magnetic neutral axis
D : can be placed anywhere
In wave winding, P/2 coils are connected under the influence of “x” pole-pairs which connect adjacent segments. X is ____
Options
A : P
B : P/2
C : 2P
D : P/4
If in the DC machine, the reversal of current in the coil is faster than ideal or linear commutation then the commutation is said to be __________ commutation.
Options
A : Retarded
B : Curvilinear
C : Accelerated
D : Under
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