DC Motors If a D.C. shunt motor is working at full load and if shunt field circuit suddenly opens This will make armature to take heavy current, possibly burning it Motor will come to stop Nothing will happen to motor This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses This will make armature to take heavy current, possibly burning it Motor will come to stop Nothing will happen to motor This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses ANSWER DOWNLOAD EXAMIANS APP
DC Motors By flux control method of speed control of a dc shunt motor, we can obtain speeds. Above as well as below the normal speed Above the normal speed only None of the listed here Below the normal speed only Above as well as below the normal speed Above the normal speed only None of the listed here Below the normal speed only ANSWER DOWNLOAD EXAMIANS APP
DC Motors The value of back emf in dc motor is maximum at Half full load Full load None of the listed here No load Half full load Full load None of the listed here No load ANSWER DOWNLOAD EXAMIANS APP
DC Motors If a D.C. motor designed for 40°C ambient temperature is to be used for 50°C ambient temperature, then the motor Of higher H.P. should be selected Can be used for 50°C ambient temperature also Is to be de-rated by a factor recommended by manufacturer and select the next higher H.P. motor Of lower H.P. should be selected Of higher H.P. should be selected Can be used for 50°C ambient temperature also Is to be de-rated by a factor recommended by manufacturer and select the next higher H.P. motor Of lower H.P. should be selected ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following can be used for controlling the speed of a dc motor? Thyratron Thermistor Transistor Thyristor Thyratron Thermistor Transistor Thyristor ANSWER DOWNLOAD EXAMIANS APP
DC Motors Where D.C. motor of H.P. 12 or more requires frequent starting, stopping, reversing and speed control All above can be used Three point starter is used Four point starter is used Drum type controller is used All above can be used Three point starter is used Four point starter is used Drum type controller is used ANSWER DOWNLOAD EXAMIANS APP
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