Electrical Machines No load test of 3-phase induction motor gives which of the following? constant loss variable loss None of these both A and B constant loss variable loss None of these both A and B ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A synchronous generator is feeding a zero power factor (lagging) load at rated current. The armature reaction is demagnetizing. ineffective. cross – magnetizing. magnetizing. demagnetizing. ineffective. cross – magnetizing. magnetizing. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Reluctance and hysteresis motors are the types of which electrical motor? 1 - Φ synchronous motor. 3 - Φ induction motor. Stepper motor. DC motor. 1 - Φ synchronous motor. 3 - Φ induction motor. Stepper motor. DC motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A commutator with a diameter of 50 cm rotating at 1000 rpm. For a brush width of 1.5 cm, find the time of commutation in ms. 0.649. 0.573. 0.512. 0.443. 0.649. 0.573. 0.512. 0.443. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole 50 Hz 1-phase induction motor is running at 1470 rpm. Find the forward and backward slips? 0.02, 1.98 0.04, 0.96 0.02, 0.98 0.04, 1.96 0.02, 1.98 0.04, 0.96 0.02, 0.98 0.04, 1.96 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole wave wound dc motor having flux per pole of 9.56 X 10-3 Wb contains 460 armature conductors with armature resistance of 0.6 ohm. Calculate the starting current flowing through the armature if the supply voltage is 240 volt. 400 Amp. 0.5 Amp. 800 Amp. 320 Amp. 400 Amp. 0.5 Amp. 800 Amp. 320 Amp. ANSWER DOWNLOAD EXAMIANS APP
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