Electrical Machines Transformer cooling and insulating oil must be of low resistivity. low viscosity. low BDV. high viscosity. low resistivity. low viscosity. low BDV. high viscosity. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor is expensive for same Kw output rates? AC single phase motor. DC Shunt Motor Synchronous motor. Induction motor. AC single phase motor. DC Shunt Motor Synchronous motor. Induction motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following voltage regulator is preferred for providing large values of load current? Transistor series regulator. Transistor shunt regulator. Zener diode shunt regulator. None of these Transistor series regulator. Transistor shunt regulator. Zener diode shunt regulator. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power input to a 3 - φ induction motor is 60 kW and stator loss is 1 kW the rotor cu loss per phase is slip X 59 / 3. slip X 69 / 3. 1. slip X 50 / 3. slip X 59 / 3. slip X 69 / 3. 1. slip X 50 / 3. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A smaller air gap in a polyphase induction motor helps to increase the starting torque. reduce the chance of crawling. reduce the chance of cogging. reduce the magnetizing current. increase the starting torque. reduce the chance of crawling. reduce the chance of cogging. reduce the magnetizing current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The volt-ampere euation for a long-shunt compound motor is given by Vt= Ea + Iara Vt = Ea + Ia(ra + rs) Vt = Ea + Iara+ ILrs Vt= Ea– Iara Vt= Ea + Iara Vt = Ea + Ia(ra + rs) Vt = Ea + Iara+ ILrs Vt= Ea– Iara ANSWER DOWNLOAD EXAMIANS APP
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