Electrical Machines In case of induction motors the ratio of length to pole pitch for minimum cost, is taken as 3 to 5. 1.5 to 2. 2 to 3. 1.0. 3 to 5. 1.5 to 2. 2 to 3. 1.0. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following DC Motor is used in paper machines? DC compound motor. DC Shunt motor. Separately excited DC motor. DC series motor. DC compound motor. DC Shunt motor. Separately excited DC motor. DC series motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the source voltage of a DC motor is increased, which of the following will decrease? Operating speed. Starting torque, operating speed, full load current. Full load current. Starting torque. Operating speed. Starting torque, operating speed, full load current. Full load current. Starting torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Breather is provided in a transformer to provide cold air in transformer. filter the transformer oil. absorb moisture from air entering in transformer. absorb moisture of air during breathing. provide cold air in transformer. filter the transformer oil. absorb moisture from air entering in transformer. absorb moisture of air during breathing. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In Ward-Leonard system, the lower limit of the speed imposed by Residual magnetism of the generator. Field resistance. None of above. Armature resistance. Residual magnetism of the generator. Field resistance. None of above. Armature resistance. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC motors are stopped by opening line switches and not by forcing the handle of the motor starter back to OFF position. This is due to occurance of Heavy sparking at brushes. None of these. Both of above. Heavy sparking at the first stud of starting resistance steps. Heavy sparking at brushes. None of these. Both of above. Heavy sparking at the first stud of starting resistance steps. ANSWER DOWNLOAD EXAMIANS APP
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