DC Motors Which of the following can be used for controlling the speed of a dc motor? Thyratron Thermistor Thyristor Transistor Thyratron Thermistor Thyristor Transistor ANSWER DOWNLOAD EXAMIANS APP
DC Motors The main disadvantage of the Ward-Leonard control method is High initial cost High maintenance cost Low efficiency at high loads All of these High initial cost High maintenance cost Low efficiency at high loads All of these ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which motor should be used for centrifugal pumps? Series motor None of the listed here Shunt motor Either series or shunt Series motor None of the listed here Shunt motor Either series or shunt ANSWER DOWNLOAD EXAMIANS APP
DC Motors Armature reaction in dc motor is increased By interpoles When the armature current increases When the armature current decreases When the field current increases By interpoles When the armature current increases When the armature current decreases When the field current increases ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following application requires high starting torque? Locomotive Centrifugal pump Air blower Lathe machine Locomotive Centrifugal pump Air blower Lathe machine ANSWER DOWNLOAD EXAMIANS APP
DC Motors If a dc motor is comnected across the AC supply it will Burn due to heat produced in the field winding by eddy currents Run at lower speed Run at normal speed Not run Burn due to heat produced in the field winding by eddy currents Run at lower speed Run at normal speed Not run ANSWER DOWNLOAD EXAMIANS APP
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