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 field resistance increase the speed of primemover check armature insulation resistance reverse the field connections increase the field resistance increase the speed of primemover ANSWER DOWNLOAD EXAMIANS APP
DC Generators Stray losses consist of Magnetic and mechanical losses Mechanical and copper losses None of the listed here Magnetic and copper losses Magnetic and mechanical losses Mechanical and copper losses None of the listed here Magnetic and copper losses ANSWER DOWNLOAD EXAMIANS APP
DC Generators In a lap winding, the number of the brushes required is equal to Number of pairs of poles Commutator pitch None of the listed here Number of poles Number of pairs of poles Commutator pitch None of the listed here Number of poles ANSWER DOWNLOAD EXAMIANS APP
DC Generators Due to armature reaction, the main pole flux of a dc generator is Weakened as well as distorted None of the listed here Weakend only Distorted only Weakened as well as distorted None of the listed here Weakend only Distorted only ANSWER DOWNLOAD EXAMIANS APP
DC Generators Carbon brushes are used in a dc machine because _______ None of the listed here 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 ANSWER DOWNLOAD EXAMIANS APP
DC Generators Open circuited armature coil of a D.C. machine is None of these Indicated by a spark completely around the commutator Both of the listed here Identified by the scarring of the commutator segment to which open circuited coil is connected None of these Indicated by a spark completely around the commutator Both of the listed here Identified by the scarring of the commutator segment to which open circuited coil is connected ANSWER DOWNLOAD EXAMIANS APP
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