Electrical Machines The rotor slots are slightly skewed in squirrel cage induction motor to decrease the amount of copper to be used. provide ease of fabrication. increase the strength of rotor bars. reduce the magnetic hum and locking tendency of rotor. decrease the amount of copper to be used. provide ease of fabrication. increase the strength of rotor bars. reduce the magnetic hum and locking tendency of rotor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single-winding single-phase motor has zero starting torque. high starting torque. starting torque equal to full-load torque. low starting torque. zero starting torque. high starting torque. starting torque equal to full-load torque. low starting torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which DC motor will have least percentage increase of input current, for the same percentage increase in the torque Separately Excited DC Motor Compound Wound DC Motor DC Shunt Motor DC Series Motor Separately Excited DC Motor Compound Wound DC Motor DC Shunt Motor DC Series Motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What are slot wedges in a DC machine made of? Fibre. Cast iron. Mild steel. Silicon steel. Fibre. Cast iron. Mild steel. Silicon steel. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the number of rotor slots is equal to number of stator slots, then motor refuses to start. Hence it is known as cogging. relative speed. air gap. crawling. cogging. relative speed. air gap. crawling. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a practical synchronous motor the pull out torque will occur when the torque angle is nearly equal to 0°. 75°. 45°. 30°. 0°. 75°. 45°. 30°. ANSWER DOWNLOAD EXAMIANS APP