DC Generators The O. C. C. of a dc generator is also called its_______ characteristic. No load saturation External Performance Internal No load saturation External Performance Internal ANSWER DOWNLOAD EXAMIANS APP
DC Generators The rapid wear of brushes takes place due to All of these Abrasion from dust Rough commutator bars Excessive spring pressure All of these Abrasion from dust Rough commutator bars Excessive spring pressure ANSWER DOWNLOAD EXAMIANS APP
DC Generators The purpose of providing dummy coils in a generator is To provide mechanical balance for the rotor To reduce eddy current losses To enhance flux density To amplify voltage To provide mechanical balance for the rotor To reduce eddy current losses To enhance flux density To amplify voltage 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
DC Generators The terminal voltage of a D.C. shunt generator drops on load because of all of the following reasons except Armature resistance drop Armature reaction Commutation Field weakening due to armature reaction and armature Armature resistance drop Armature reaction Commutation Field weakening due to armature reaction and armature ANSWER DOWNLOAD EXAMIANS APP
DC Generators Magnetic field in a D.C. generator is produced by Electromagnets Both (A) and (B) Permanent magnets None of these Electromagnets Both (A) and (B) Permanent magnets None of these ANSWER DOWNLOAD EXAMIANS APP
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