Electrical Machines A 230 V, 50 Hz, 4 pole single phase induction motor is rotating in the clockwise ( forward ) direction at a speed of 1425 rpm. If the rotor resistance at standstill is 7.8 Ω. Then the effective rotor resistance in the backward branch of the equivalent circuit will be 2 Ω. 8 Ω. 4 Ω. 10 Ω. 2 Ω. 8 Ω. 4 Ω. 10 Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Why are capacitors used with large AC induction motor? Improve power level. Improve current level. Improve power factor. Improve voltage level. Improve power level. Improve current level. Improve power factor. Improve voltage level. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In most condition which frame of motor will be preferred? Totally enclosed fan coiled. Open type. Drip proof. Splash proof. Totally enclosed fan coiled. Open type. Drip proof. Splash proof. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is/are the advantages of parallel operation of alternators? All of these Increase in reliability continuity supply is maintained Increase efficiency under light load conditions All of these Increase in reliability continuity supply is maintained Increase efficiency under light load conditions ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC Shunt Motor has disadvantage(s) of less expensive. constant speed. none of above. not suitable for rapidly changing loads. less expensive. constant speed. none of above. not suitable for rapidly changing loads. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines On what factors the speed of dc motor depends? Applied voltage. Armature current Ia. All of these. Field flux. Applied voltage. Armature current Ia. All of these. Field flux. ANSWER DOWNLOAD EXAMIANS APP
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