Electrical Machines Iron losses in a DC machine are independent of variation in load. speed. speed and voltage. voltage. load. speed. speed and voltage. voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A synchorous generator connected to an infinite bus is over excited. Considering only the reactive power from the point view of the system the machine acts as A capacitor. None of these. A resistor. an inductor. A capacitor. None of these. A resistor. an inductor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The slot edges in a DC machine are made of Cast iron. Fibre. Mild steel. Silicon steel. Cast iron. Fibre. Mild steel. Silicon steel. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 200 V DC machine supplies 20 A at 200 V as a generator. The armature resistance is 0.2 Ω. If the machine is now operated as a motor at same terminal voltage and current but with the flux increased by 10%, the ratio of motor speed to generator speed is 0.87 0.96 0.95 1.06 0.87 0.96 0.95 1.06 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction effect is more in which of the following methods? armature resistance control None of these same in both methods field weakening method armature resistance control None of these same in both methods field weakening method ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In an alternator, voltage drops occurs in armature resistance, leakage reactance and armature reaction. armature resistance and leakage reactance. armature resistance only. armature resistance, leakage reactance, armature reaction and earth connection. armature resistance, leakage reactance and armature reaction. armature resistance and leakage reactance. armature resistance only. armature resistance, leakage reactance, armature reaction and earth connection. ANSWER DOWNLOAD EXAMIANS APP
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