DC Motors If a D.C. shunt motor is working at full load and if shunt field circuit suddenly opens Nothing will happen to motor This will make armature to take heavy current, possibly burning it This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses Motor will come to stop Nothing will happen to motor This will make armature to take heavy current, possibly burning it This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses Motor will come to stop ANSWER DOWNLOAD EXAMIANS APP
DC Motors Ward-Leonard control is basically a Armature resistance control method Field divertor method Voltage control method Field control method Armature resistance control method Field divertor method Voltage control method Field control method ANSWER DOWNLOAD EXAMIANS APP
DC Motors If conditions for maximum power for a dc motor are established, the efficiency of the motor will be 60 to 70 % Less than 50% 100 % 80 to 90 % 60 to 70 % Less than 50% 100 % 80 to 90 % ANSWER DOWNLOAD EXAMIANS APP
DC Motors The maximum end play of a motor is about 10 mm 0.4 mm 2 mm 6 mm 10 mm 0.4 mm 2 mm 6 mm ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a D.C. series motor, if the armature current is reduced by 50%, the torque of the motor will be equal to 10% of the previous value 100% of the previous value 50% of the previous value 25% of the previous value 10% of the previous value 100% of the previous value 50% of the previous value 25% of the previous value ANSWER DOWNLOAD EXAMIANS APP
DC Motors In D.C. shunt motors as load is reduced The speed will remain almost/constant The speed will reduce The speed will increase abruptly The speed will increase in proportion to reduction in load The speed will remain almost/constant The speed will reduce The speed will increase abruptly The speed will increase in proportion to reduction in load ANSWER DOWNLOAD EXAMIANS APP
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