Electrical Machines No load test on induction motor is conducted to find which of the following losses? Stator core loss Rotational loss Stator copper loss All of these Stator core loss Rotational loss Stator copper loss All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum power developed by a synchronous motor depends on supply voltage and load angle excitation and load angle supply voltage, load angle and excitation supply voltage and excitation supply voltage and load angle excitation and load angle supply voltage, load angle and excitation supply voltage and excitation ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The use of double squirrel cage winding on the rotor provides higher efficiency. reduced starting torque. a large starting torque. low noise. higher efficiency. reduced starting torque. a large starting torque. low noise. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements regarding the speed control of dc motors : 1. ward-leonard method is suitable forconstant-torque drives 2. Ward-leonard method is suitable for constant-power drives 3. field-control method facilitates speed control below base speed 4. Armature-resistance control method is more efficient than ward-leanard method 5. Field-control method is suitable for constant-torque drives 6. Armature-resistance control method is suitable for constant-torque drives From these, the correct answer is 1, 2, 5 1, 3, 5 1, 2, 6 1, 4, 6 1, 2, 5 1, 3, 5 1, 2, 6 1, 4, 6 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machine armature windings are placed on rotor because of the necessity for generation of voltage. electromechanical energy conversion. development of torque. commutation. generation of voltage. electromechanical energy conversion. development of torque. commutation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of 3 - Φ IM, plugging means locking of rotor due to harmonics. pulling the motor directly on line without a rotor. interchanging two supply phases for quick stopping. starting the motor on load which is more than the rated load. locking of rotor due to harmonics. pulling the motor directly on line without a rotor. interchanging two supply phases for quick stopping. starting the motor on load which is more than the rated load. ANSWER DOWNLOAD EXAMIANS APP
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