Electrical Machines When the rotor of a 3 phase induction motor is blocked then the slip is 0.3. 1. 0.7. 0.54. 0.3. 1. 0.7. 0.54. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are identical as 4% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW? generator 1 gets over load 200 MW and 400MW respectively 230.7 MW and 369.23 MW respectively generator 2 gets over load generator 1 gets over load 200 MW and 400MW respectively 230.7 MW and 369.23 MW respectively generator 2 gets over load ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Synchronous condensers are used to improve the power factor All of these reduce hunting improve starting torque improve the power factor All of these reduce hunting improve starting torque ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 3 - Φ IM with line frequency f1 and winding factor kw1 and kw2 for stator and rotor respectively the ratio of per phase stator winding emf E1 to per phase rotor winding emf E2 at standstill is given by E1 / E2 = N1 / N2. E1 / E2 = 1. E1 / E2 = N1kw1 / N2kw2. E1 / E2 = f1kw1 / f2kw2. E1 / E2 = N1 / N2. E1 / E2 = 1. E1 / E2 = N1kw1 / N2kw2. E1 / E2 = f1kw1 / f2kw2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Direction of rotation of DC motor is reversed by Adding resistance to field circuit. Reversing armature connection or field connection. Reversing supply connection. Interchanging armature and field connection. Adding resistance to field circuit. Reversing armature connection or field connection. Reversing supply connection. Interchanging armature and field connection. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature of DC machine is made of silicon steel lamination to reduce both eddy current and hysteresis loss. reduce eddy current loss only. increase the permeability. reduce hysteresis loss only. reduce both eddy current and hysteresis loss. reduce eddy current loss only. increase the permeability. reduce hysteresis loss only. ANSWER DOWNLOAD EXAMIANS APP
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