Electrical Machines A 4 pole 50 Hz induction motor is running at 1470 rpm. Find the speed of stator magnetic field with respect to rotor? zero 1500 rpm 30 rpm 1470 rpm zero 1500 rpm 30 rpm 1470 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In most condition which frame of motor will be preferred? Totally enclosed fan coiled. Drip proof. Splash proof. Open type. Totally enclosed fan coiled. Drip proof. Splash proof. Open type. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole DC generator runs at 750 rpm and generate an emf of 240 V. The armature is wave wound and has 792 conductors. If the total flux from each pole is 0.0145 Wb. What is the leakage co-efficient? 1.2. 1.5. 1.8. 1.4. 1.2. 1.5. 1.8. 1.4. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which of the following motors DC excitation is not required? 3-phase synchronous motor 3-phase synchronous generator hysteresis motor reluctance motor 3-phase synchronous motor 3-phase synchronous generator hysteresis motor reluctance motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following methods of speed control is not affected through stator side? Change of supply voltage. Change of supply frequency. Change of number of pole. Change of rotor resistance. Change of supply voltage. Change of supply frequency. Change of number of pole. Change of rotor resistance. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ideal value of voltage regulation of a device is? a finite negative value 0 ∞ a positive finite value a finite negative value 0 ∞ a positive finite value ANSWER DOWNLOAD EXAMIANS APP
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