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