AC THREE PHASE MOTOR - Practice Mode
1) What is the purpose of using thermal cutout in addition to fuse in A.C motor circuit?
Correct Answer: Allow for continuous over loading
Explanation:
Thermal cutout in addition to fuse in A.C motor circuit is used to allow for continuous overloading.
2) Which type of motor is used to provide high starting torque at variable speed?
Correct Answer: 3 Phase slip ring induction motor
3) What is the relation between torque and slip in an A.C induction motor?
Correct Answer: Slip increases torque increases
4) What is effect of A.C induction motor if rotor bar is in open circuit?
Correct Answer: Over heating of motor
5) Which type of wire is used for rewinding of A.C 3 phase motors?
Correct Answer: Super enamelled copper wire