Electrical Machines The material used for commutator brushes is mostly cast iron. carbon. copper. mica. cast iron. carbon. copper. mica. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two DC series motors are connected in series and are driving the same mechanical load. If the motors are now connected in parallel the speed will become double. one fourth. 4 times. half. double. one fourth. 4 times. half. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Wave winding is prefered for which of the following rating? low current and high voltage low current and low voltage high current and low voltage high current and high voltage low current and high voltage low current and low voltage high current and low voltage high current and high voltage ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider a separately excited DC motor. If the field current is increased while the armature terminal voltage is held constant, then speed of the motor will Decrease.d increase. none of these. remains same. Decrease.d increase. none of these. remains same. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power input to a 3 - φ induction motor is 60 kW and stator loss is 1 kW the rotor cu loss per phase is slip X 69 / 3. slip X 59 / 3. slip X 50 / 3. 1. slip X 69 / 3. slip X 59 / 3. slip X 50 / 3. 1. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Skewing of the rotor in a 3 - Φ squirrel cage induction motor reduces noise, parasitic and starting torque, but increase pull out torque. noise and parasitic torque, but increase starting and pull-out torque. noise and pullout torque, but increase parasitic and starting torque. noise, parasitic torque, starting torque and pull out torque. noise, parasitic and starting torque, but increase pull out torque. noise and parasitic torque, but increase starting and pull-out torque. noise and pullout torque, but increase parasitic and starting torque. noise, parasitic torque, starting torque and pull out torque. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS