Electrical Machines Under which of the following conditions hunting of synchronous motor is likely to occur ? Over-loading for long period. Periodic variation of load. Small and constant load. Over-excitation. Over-loading for long period. Periodic variation of load. Small and constant load. Over-excitation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 440 V, 3-phase, 10 pole and 50 HZ synchronous motor delivering a torque of 50 N-m, delivers a power of 1000W 100W 3000W 500W 1000W 100W 3000W 500W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC motor with armature resistance of 0.5 ohms connected directly to a 220 Volt supply. If the armature is stationary then the current flowing through the armature is 570 A. 440 A. 340 A. 250 A. 570 A. 440 A. 340 A. 250 A. 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. synchronous motor torque. DC motor torque. induction motor torque. induction generator torque. synchronous motor torque. DC motor torque. induction motor torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which type of motors are preferred in lifts? None of these DC compound motors. DC series motors. DC shunt motors. None of these DC compound motors. DC series motors. DC shunt motors. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The main disadvantage(s) of the ward-Leonard system is/are poor overall efficiency. high maintenance cost. all of above. high initial cost. poor overall efficiency. high maintenance cost. all of above. high initial cost. ANSWER DOWNLOAD EXAMIANS APP
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