DC Generators To avoid formation of grooves in the commutator of a D.C. machine Brush position has no effect on the commutator grooving The brushes of same polarity should track each other All of these The brushes of opposite polarity should track each other Brush position has no effect on the commutator grooving The brushes of same polarity should track each other All of these The brushes of opposite polarity should track each other ANSWER DOWNLOAD EXAMIANS APP
DC Generators The insulating material used between the commutator segments is normally Graphite Insulating varnish Mica Paper Graphite Insulating varnish Mica Paper ANSWER DOWNLOAD EXAMIANS APP
DC Generators In a D.C. generator the critical resistance refers to the resistance of Load Field Brushes Armature Load Field Brushes Armature ANSWER DOWNLOAD EXAMIANS APP
DC Generators The size of a dc generator can be reduced by using ______ High resistance winding material Iron commutator Lap winding Magnetic material of high permeability High resistance winding material Iron commutator Lap winding Magnetic material of high permeability ANSWER DOWNLOAD EXAMIANS APP
DC Generators As a result of armature reaction, the reduction in the total mutual air gap flux in a D.C. generator is approximately 5 percent 25 percent 40 percent 10 percent 5 percent 25 percent 40 percent 10 percent ANSWER DOWNLOAD EXAMIANS APP
DC Generators Stray losses consist of Magnetic and copper losses Mechanical and copper losses None of the listed here Magnetic and mechanical losses Magnetic and copper losses Mechanical and copper losses None of the listed here Magnetic and mechanical losses ANSWER DOWNLOAD EXAMIANS APP
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