Electrical Machines In a synchronous motor when the rotor speed exceeds the synchronous speed during hunting the damper bars develop induction motor torque. negative sequence currents are generated. the damper bars develop induction generator torque. the damper bars develop synchronous motor torque. the damper bars develop induction motor torque. negative sequence currents are generated. the damper bars develop induction generator torque. the damper bars develop synchronous motor torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following machine will have maximum efficiency? Electrical power generator. Induction motor. Electrical power transformer. DC motor. Electrical power generator. Induction motor. Electrical power transformer. DC motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature coil is short circuited by brushes when it lies along neutral axis. along field axis. in none of above positions. in any of above positions. along neutral axis. along field axis. in none of above positions. in any of above positions. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are identical as 4% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW? generator 2 gets over load 230.7 MW and 369.23 MW respectively 200 MW and 400MW respectively generator 1 gets over load generator 2 gets over load 230.7 MW and 369.23 MW respectively 200 MW and 400MW respectively generator 1 gets over load ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V DC generator is run at full speed without any excitation. The open circuit voltage will be about 50 V. zero. 220 V. about 2 V. about 50 V. zero. 220 V. about 2 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Short circuiting is caused in the armature winding due to any of above. failure of insulation between two commutator bars. failure of insulation between two turns of coil. grounding of two or more turns of the same coil. any of above. failure of insulation between two commutator bars. failure of insulation between two turns of coil. grounding of two or more turns of the same coil. ANSWER DOWNLOAD EXAMIANS APP
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