Dc Machines Experienced Online Exam Quiz
Dc Machines Experienced GK Quiz. Question and Answers related to Dc Machines Experienced. MCQ (Multiple Choice Questions with answers about Dc Machines Experienced
What is the pole arc/pitch ratio, if 360 AT compensating winding is used where 1960AT is peak value?
Options
A : 0.7
B : 0.8
C : 0.9
D : 0.6
Calculate the number of conductors on each pole piece required in a compensating winding for a 6-pole lap-wound dc armature containing 286 conductors. The compensating winding carries full armature current. Assume ratio of pole arc/ pole pitch = 0.7.
Options
A : 6
B : 8
C : 9
D : 7
Only drawback of compensating winding is _______
Options
A : Cost
B : Unavailability of material
C : Construction
D : Not a single drawback
Axis undergo shifting as a result of armature reaction, can be balanced by ______
Options
A : Increase in armature current
B : Decrease in armature current
C : Introducing interpoles
D : Removing interpoles
If pole arc is less than pole pitch, a compensating winding will have ampere-turns _________ (compare to peak ampere turns).
Options
A : Less
B : Equal
C : More
D : Can’t be specified
A compensating winding with ampere-turns greater than peak ampere turns is required in order to neutralize the effect of armature reaction because _____________
Options
A : Pole arc = Pole pitch
B : Pole arc > Pole pitch
C : Pole arc < Pole pitch
D : Can’t be determined using pole arc, pole pitch
To counter the effect of shift in MNA due to armature reaction, which of the following component can be shifted?
Options
A : Poles
B : Commutator
C : Brushes
D : Cannot be determined
Cross-magnetizing effect of armature reaction can be reduced by __________
Options
A : Removing saturation in teeth and pole-shoe
B : Making smooth pole shoes
C : Introducing saturation in teeth and pole-shoe
D : Cannot be determined
The choice of average coil voltage determines the minimum number of commutator segments for its design.
Options
A : True
B : False
C :
D :
Compensating winding will provide incomplete neutralization ____________
Options
A : Under pole region
B : In interpolar region
C : Everywhere
D : Complete neutralization
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