Three Phase Induction Motors A 3 phase 440 v, 50 Hz induction motor has 4% slip. The frequency of rotor emf will be 200 Hz 50 Hz 2 Hz 20 Hz 200 Hz 50 Hz 2 Hz 20 Hz ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The shape of the torque/slip curve of induction motor is Straight line Parabola Rectangular parabola Hyperbola Straight line Parabola Rectangular parabola Hyperbola ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The complete circle diagram of induction motor can be drawn with the help of data found from No-load test Stator resistance test All of these Blocked rotor test No-load test Stator resistance test All of these Blocked rotor test ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The efficiency of an induction motor can be expected to be nearly 80 to 90% 99% 95 to 98 % 60 to 90% 80 to 90% 99% 95 to 98 % 60 to 90% ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors An induction motor is preferred to a dc motor because it _______ Provides high starting torque Has simple and rugged construction Provides fine speed control None of the listed here Provides high starting torque Has simple and rugged construction Provides fine speed control None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors A wound rotor motor is mainly used in applications where ______ Less costly motor is not required Speed control is required High rotor resistance is required during running High starting torque is required Less costly motor is not required Speed control is required High rotor resistance is required during running High starting torque is required ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS