Electrical Machines No load saturation characteristics are plotted between short circuit current and field current no load voltage and armature current short circuit current and armature current no load voltage and field current short circuit current and field current no load voltage and armature current short circuit current and armature current no load voltage and field current ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements : 1. interpole windings are connected in series with armature windings 2. polarity of interpoles must be the same as that of the main poles in advance 3. distortion of the main field under the pole shoes is not affected by the use of interpoles From above, the correct answer is 1 and 2 1 alone 1 and 3 2 and 3 1 and 2 1 alone 1 and 3 2 and 3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of rotation of a 3 - Φ induction motor can be reversed by transposing any two leads from slip rings. transposing any two leads from supply. transposing all the three leads from the supply. disconnecting any one phase. transposing any two leads from slip rings. transposing any two leads from supply. transposing all the three leads from the supply. disconnecting any one phase. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Slip test is performed to determine positive sequence reactance and negative sequence reactance slip All of these direct axis reactance and quadrature axis reactance positive sequence reactance and negative sequence reactance slip All of these direct axis reactance and quadrature axis reactance ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction effect is more in which of the following methods? armature resistance control field weakening method same in both methods None of these armature resistance control field weakening method same in both methods None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 400 V, 50 Hz, 30 Hp, three phase IM is drawing 50 A current at 0.8 p.f lagging. The stator and rotor copper losses are 1.5 KW and 900 W respectively. The friction and windage losses are 1050 W and core losses are 1200 W. The air gap power of the motor will be 26.21 kW. 25 kW. 24.11 kW. 23.06 kW. 26.21 kW. 25 kW. 24.11 kW. 23.06 kW. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS