Electrical Machines The starting resistance of DC motor is generally Infinitely large. around 500 ohms. 1000 ohms. Low. Infinitely large. around 500 ohms. 1000 ohms. Low. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In above question, find rms line voltage for delta connection? 50 V. 399 V. 230.2 V. 100 V. 50 V. 399 V. 230.2 V. 100 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC motors are stopped by opening line switches and not by forcing the handle of the motor starter back to OFF position. This is due to occurance of Heavy sparking at brushes. Heavy sparking at the first stud of starting resistance steps. Both of above. None of these. Heavy sparking at brushes. Heavy sparking at the first stud of starting resistance steps. Both of above. None of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Unbalance 3 - Φ stator currents cause heating of rotor. All of these vibrations. double frequency currents in the rotor. heating of rotor. All of these vibrations. double frequency currents in the rotor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The efficiency of a transformer is mainly dependent on core losses. dielectric losses. stray losses. copper losses. core losses. dielectric losses. stray losses. copper losses. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Under which of the following conditions is a dc motor provided with compensating winding used ? 1. Wide range of speed control above normal 2. Wide range of steady load variation with no speed control 3.Wide range of rapid variation in load Select the correct answer using the codes given below : Codes : 2 and 3 1, 2 and 3 1 and 2 1 and 3 2 and 3 1, 2 and 3 1 and 2 1 and 3 ANSWER DOWNLOAD EXAMIANS APP
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