DC Generators The rapid wear of brushes takes place due to All of these Abrasion from dust Excessive spring pressure Rough commutator bars All of these Abrasion from dust Excessive spring pressure Rough commutator bars 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 coils Number of armature turns Number of armature coil sides Number of armature conductors Number of armature coils Number of armature turns Number of armature coil sides ANSWER DOWNLOAD EXAMIANS APP
DC Generators The insulating material used between the commutator segments is normally Paper Insulating varnish Graphite Mica Paper Insulating varnish Graphite Mica ANSWER DOWNLOAD EXAMIANS APP
DC Generators The bearings used to support the rotor shafts are generally Magnetic bearings Bush bearings Needle bearings Ball bearings Magnetic bearings Bush bearings Needle 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 check armature insulation resistance reverse the field connections increase the speed of primemover increase the field resistance check armature insulation resistance reverse the field connections increase the speed of primemover increase the field resistance ANSWER DOWNLOAD EXAMIANS APP
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