DC Generators The brush voltage drop in dc machine is about _______ 2 V 10 V 20 V 0.1 V 2 V 10 V 20 V 0.1 V 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 field resistance increase the speed of primemover reverse the field connections check armature insulation resistance increase the field resistance increase the speed of primemover reverse the field connections check armature insulation resistance ANSWER DOWNLOAD EXAMIANS APP
DC Generators The armature winding of a dc machine is place on the rotor to ______ Reduce losses Facilitate commutation Reduce armature reaction Save iron Reduce losses Facilitate commutation Reduce armature reaction Save iron ANSWER DOWNLOAD EXAMIANS APP
DC Generators The bearings used to support the rotor shafts are generally Needle bearings Magnetic bearings Bush bearings Ball bearings Needle bearings Magnetic bearings Bush bearings Ball bearings ANSWER DOWNLOAD EXAMIANS APP
DC Generators The e.m.f. induced in the armature of a shunt generator is 600 V. The armature resistance is 0.1 ohm. If the armature current is 200 A, the terminal voltage will be 620 V 640 V 580 V 600 V 620 V 640 V 580 V 600 V ANSWER DOWNLOAD EXAMIANS APP
DC Generators The insulating material used between the commutator segments is normally Mica Graphite Insulating varnish Paper Mica Graphite Insulating varnish Paper ANSWER DOWNLOAD EXAMIANS APP
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