Electrical Machines DC machine is a convection machine. both are correct. none of above are correct. conduction machine. convection machine. both are correct. none of above are correct. conduction machine. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator, the ripples in the direct emf generated are reduced by employing commutator with large number of segments. equalizer rings. carbon brushes. graphite brushes. commutator with large number of segments. equalizer rings. carbon brushes. graphite brushes. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generator, armature reaction refers to what? Effect of armature flux on the main field flux. Effect of armature flux on the load. Effect of field flux on the armature flux. None of these Effect of armature flux on the main field flux. Effect of armature flux on the load. Effect of field flux on the armature flux. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V DC machine has an armature resistance 1Ω. If the full load current is 20 A, the difference of induced voltage and generator is 20 V. 0 V. 60 V. 40 V. 20 V. 0 V. 60 V. 40 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A smaller air gap in a induction motor helps to reduce the chance of crawling. reduce the chance of cogging. increase the starting torque. reduce the magnetizing current. reduce the chance of crawling. reduce the chance of cogging. increase the starting torque. reduce the magnetizing current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When the rotor speed, in a synchronous machine, becomes more than the synchronous speed during hunting, the damper bars develop induction generator torque. induction motor torque. synchronous motor torque. DC motor torque. induction generator torque. induction motor torque. synchronous motor torque. DC motor torque. ANSWER DOWNLOAD EXAMIANS APP
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