Electrical Machines In a three phase slip-ring induction motor, brushes are connected to equalizing coils. external star-connected resistors. 3 - Φ AC supply. DC supply. equalizing coils. external star-connected resistors. 3 - Φ AC supply. DC supply. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generators, the brushes remain in contact with conductors which lie under north pole. there is no hard and fast rule for this. lie in the inter polar gaps. lie under south pole. lie under north pole. there is no hard and fast rule for this. lie in the inter polar gaps. lie under south pole. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc series motor driving and electric train faces a constant power load. It is running at rated speed and rated voltage. If the speed has to be brought down to 0.25 p.u. the supply voltage has to be approximately brought down to 0.25 p.u 0.5 p.u 0.75 p.u 0.125 p.u 0.25 p.u 0.5 p.u 0.75 p.u 0.125 p.u ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of DC Shunt Motor, the speed will____ if the voltage increases, neglecting armature saturation. decrease. remain the same. be unpredictable. increase decrease. remain the same. be unpredictable. increase ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The leakage reactance of a 3-phase alternator is determined by performing open circuit and short circuit tests. short circuit and slip tests. zero power factor and slip tests. open circuit and zero power factor tests. open circuit and short circuit tests. short circuit and slip tests. zero power factor and slip tests. open circuit and zero power factor tests. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of following winding is connected in series with armature winding of DC machine? Auxiliary winding. Compensating winding. Both Compensating and Commutating pole winding. Commutating pole winding. Auxiliary winding. Compensating winding. Both Compensating and Commutating pole winding. Commutating pole winding. ANSWER DOWNLOAD EXAMIANS APP
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