Electrical Machines Which of these types of motor is used in elevators? DC compound motor. DC series motor. None of these. DC shunt motor. DC compound motor. DC series motor. None of these. DC shunt motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two DC series motors are connected in series and are driving the same mechanical load. If the motors are now connected in parallel the speed will become one fourth. half. 4 times. double. one fourth. half. 4 times. double. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Oil is provided in an oil filled transformer for insulating. lubrication. both cooling and insulation. cooling. insulating. lubrication. both cooling and insulation. cooling. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Motors for fans and pumps are selected in the rpm range 500 to 720. 375 to 500. 720 to 920. 1440 to 2880. 500 to 720. 375 to 500. 720 to 920. 1440 to 2880. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines which of the following losses are negligible in blocked rotor test? copper loss both A and B mechanical loss iron loss copper loss both A and B mechanical loss iron loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following methods of speed control is not affected through stator side? Change of number of pole. Change of supply voltage. Change of supply frequency. Change of rotor resistance. Change of number of pole. Change of supply voltage. Change of supply frequency. Change of rotor resistance. ANSWER DOWNLOAD EXAMIANS APP
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