DC Generators The brush voltage drop in dc machine is about _______ 0.1 V 2 V 10 V 20 V 0.1 V 2 V 10 V 20 V ANSWER DOWNLOAD EXAMIANS APP
DC Generators In lap winding, the number of brushes is always Half the number of poles Same as the number of poles Two Double the number of poles Half the number of poles Same as the number of poles Two Double the number of poles ANSWER DOWNLOAD EXAMIANS APP
DC Generators Carbon brushes are used in a dc machine because _______ Carbon lubricates and polishes the commutator Contact resistance is decreased Carbon is cheap None of the listed here Carbon lubricates and polishes the commutator Contact resistance is decreased Carbon is cheap None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Generators The terminal voltage of a D.C. shunt generator drops on load because of all of the following reasons except Commutation Armature resistance drop Armature reaction Field weakening due to armature reaction and armature Commutation Armature resistance drop Armature reaction Field weakening due to armature reaction and armature ANSWER DOWNLOAD EXAMIANS APP
DC Generators The overall efficiency of a dc generator is maximum when its variable loss is equal to Iron loss Mechanical loss Constant loss Stray loss Iron loss Mechanical loss Constant loss Stray loss ANSWER DOWNLOAD EXAMIANS APP
DC Generators The insulating material used between the commutator segments is normally Insulating varnish Graphite Mica Paper Insulating varnish Graphite Mica Paper ANSWER DOWNLOAD EXAMIANS APP
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