DC Generators The rapid wear of brushes takes place due to All of these Rough commutator bars Abrasion from dust Excessive spring pressure All of these Rough commutator bars Abrasion from dust Excessive spring pressure ANSWER DOWNLOAD EXAMIANS APP
DC Generators In case of D.C. machine winding, number of commutator segments is equal to Number of armature conductors Number of armature coil sides Number of armature coils Number of armature turns Number of armature conductors Number of armature coil sides Number of armature coils Number of armature turns ANSWER DOWNLOAD EXAMIANS APP
DC Generators The insulating material used between the commutator segments is normally Insulating varnish Mica Paper Graphite Insulating varnish Mica Paper Graphite ANSWER DOWNLOAD EXAMIANS APP
DC Generators The bearings used to support the rotor shafts are generally Magnetic bearings Ball bearings Needle bearings Bush bearings Magnetic bearings Ball bearings Needle bearings Bush bearings ANSWER DOWNLOAD EXAMIANS APP
DC Generators If a self excited D.C. generator after being installed, fails to build up on its first trial run, the first thing to do is to increase the speed of primemover check armature insulation resistance increase the field resistance reverse the field connections increase the speed of primemover check armature insulation resistance increase the field resistance reverse the field connections ANSWER DOWNLOAD EXAMIANS APP
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