A. lap winding
B. wave winding
C. delta winding
D. duplex wave winding
Welding generator will have____________? Read More »
D.C. Generators A. wave wound
B. lap wound
C. delta wound
D. duplex wound
Equilizer rings are required in case armature is_______________? Read More »
D.C. Generators A. oscillating magnetic field
B. pulsating magnetic flux
C. relative rotation between field and armature
D. all above
Eddy currents are induced in the pole shoes of a D.C. machine due to______________? Read More »
D.C. Generators A. to avoid sudden loading of the primemover
B. to avoid mechanicaljerk to the shaft
C. to avoid burning of switch contacts
D. all above
A. crossmagnetising
B. demagnetising
C. magnetising
D. none of above
Armature reaction of an unsaturated D.C. machine is_____________? Read More »
D.C. Generators A. demagnetisation only
B. cross magnetisation as well as mag¬netisation
C. crossmagnetisation as well as demagnetising
D. cross magnetisation only
A. lie under south pole
B. lie under north pole
C. lie under interpolar region
D. are farthest from the poles
A. graphite
B. paper
C. mica
D. insulating varnish
The insulating material used between the commutator segments is normally_____________? Read More »
D.C. Generators A. mica
B. copper
C. cast iron
D. carbon
The material for commutator brushes is generally_______________? Read More »
D.C. Generators A. 4
B. 8
C. 16
D. 32
