DC Generators Brushes of D.C. machines are made of Hard copper Soft copper All of above Carbon Hard copper Soft copper All of above Carbon ANSWER DOWNLOAD EXAMIANS APP
DC Generators Which of the following generating machine will offer constant voltage on all loads? Self-excited generator Separately excited generator Level compounded generator All of these Self-excited generator Separately excited generator Level compounded generator All of these ANSWER DOWNLOAD EXAMIANS APP
DC Generators The field winding of a dc shunt machine usually caries _______ of the rated current of the machine. 2% to 5% Less than 0.5 % More than 20% 15 to 25% 2% to 5% Less than 0.5 % More than 20% 15 to 25% ANSWER DOWNLOAD EXAMIANS APP
DC Generators The purpose of providing dummy coils in a generator is 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 To provide mechanical balance for the rotor To reduce eddy current losses ANSWER DOWNLOAD EXAMIANS APP
DC Generators The number of brushes in a commutator depends on Speed of armature Voltage Amount of current to be collected Type of winding Speed of armature Voltage Amount of current to be collected Type of winding ANSWER DOWNLOAD EXAMIANS APP
DC Generators Magnetic field in a D.C. generator is produced by Permanent magnets None of these Electromagnets Both (A) and (B) Permanent magnets None of these Electromagnets Both (A) and (B) ANSWER DOWNLOAD EXAMIANS APP
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