DC Generators The rapid wear of brushes takes place due to Excessive spring pressure Rough commutator bars All of these Abrasion from dust Excessive spring pressure Rough commutator bars All of these Abrasion from dust ANSWER DOWNLOAD EXAMIANS APP
DC Generators In case of D.C. machine winding, number of commutator segments is equal to Number of armature coil sides Number of armature conductors Number of armature turns Number of armature coils Number of armature coil sides Number of armature conductors Number of armature turns Number of armature coils ANSWER DOWNLOAD EXAMIANS APP
DC Generators The insulating material used between the commutator segments is normally Graphite Paper Mica Insulating varnish Graphite Paper Mica Insulating varnish ANSWER DOWNLOAD EXAMIANS APP
DC Generators The bearings used to support the rotor shafts are generally Needle bearings Bush bearings Magnetic bearings Ball bearings Needle bearings Bush bearings Magnetic bearings Ball 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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