Electrical Machines The shaft of induction motor should be any of these. flexible. stiff. hollow. any of these. flexible. stiff. hollow. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the full load speed of 3-phase, 50Hz induction motor is 950 rpm, what is its half load speed nearly equals to? 940 rpm 950 rpm 1000 rpm 975 rpm 940 rpm 950 rpm 1000 rpm 975 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the speed of stator rotating magnetic field with respect to rotor rotating magnetic field? None of these Slip speed Synchronous speed Zero None of these Slip speed Synchronous speed Zero 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, 4, 6 1, 2, 6 1, 3, 5 1, 2, 5 1, 4, 6 1, 2, 6 1, 3, 5 1, 2, 5 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines During hunting of a synchronous motor negative phase sequence currents are generated. damper bar develops torque. harmonic are developed in the armature circuit. field excitation increases. negative phase sequence currents are generated. damper bar develops torque. harmonic are developed in the armature circuit. field excitation increases. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generators brushes are used for collecting of current without any sparkings convert ac armature current in to dc collecting of voltage reduce eddy current loss collecting of current without any sparkings convert ac armature current in to dc collecting of voltage reduce eddy current loss ANSWER DOWNLOAD EXAMIANS APP
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