Electrical Machines In travelling cranes for crane travel, trolley and boom hoist which motor is preferred? Stepper motor. Slip ring induction motor. DC differential compound motor. Synchronous motor. Stepper motor. Slip ring induction motor. DC differential compound motor. Synchronous motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of DC Shunt Motor, the speed will____ if the voltage increases, neglecting armature saturation. remain the same. increase decrease. be unpredictable. remain the same. increase decrease. be unpredictable. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator if field winding attains the critical resistance machine will generate maximum power. the voltage generated will be zero. field winding will burn. machine will generate maximum voltage. machine will generate maximum power. the voltage generated will be zero. field winding will burn. machine will generate maximum voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements: To control the speed of a dc shunt motor above the base speed over a reasonably wide range, the motor must 1. have compensating winding 2. have interpole winding 3. be started using a 3-point starter 4. be started using a 4-point starter Of these statements 1, 2 and 4 are correct 2 and 4 are correct 1, 2 and 3 are correct 1 and 3 are correct 1, 2 and 4 are correct 2 and 4 are correct 1, 2 and 3 are correct 1 and 3 are correct ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which of the following DC Motor the ratio of starting torque to full load torque is minimum? Shunt motor. Differential compound motor. Cumulative compound motor. Series motor. Shunt motor. Differential compound motor. Cumulative compound motor. Series motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If in DC Shunt Motor the flux is reduced suddenly to zero, then the motor will come to stop. the motor will attain dangerously high speed. the armature current will reduce. the speed of motor will be reduced. the motor will come to stop. the motor will attain dangerously high speed. the armature current will reduce. the speed of motor will be reduced. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS