The shaft of an induction motor is made of? Mark as favorite Copy Link stiff flexible hollow any of the above Check Answer
In medium sized induction motors, the slip is generally around? Mark as favorite Copy Link 0.04% 0.4% 4% 14% Check Answer
The shaft of an induction motor is made of? Mark as favorite Copy Link high speed steel stainless steel carbon steel cast iron Check Answer
In a three-phase induction motor, the number of poles in the rotor winding is always? Mark as favorite Copy Link zero more than the number of poles in stator less than number of poles in stator equal to number of poles in stator Check Answer
It is advisable to avoid line starting of induction motor and use starter because? Mark as favorite Copy Link it will run in reverse direction it will pick up very high speed and may go out of step motor takes five to seven times its full-load current starting torque is very high Check Answer
The crawling in the induction motor is caused by? Mark as favorite Copy Link low voltage supply high loads harmonics developed in the motor improper design of the machine Check Answer
If any two phases for an induction motor are interchanged? Mark as favorite Copy Link the motor will run in reverse direction the motor will run at reduced speed the motor will not run the motor will burn Check Answer
The ‘cogging’ of an induction motor can be avoided by? Mark as favorite Copy Link proper ventilation using DOL starter auto-transformer starter having number of rotor slots more or less than the number of stator slots (not equal) Check Answer
In an induction motor the relationship between stator slots and rotor slots is that? Mark as favorite Copy Link stator slots are equal to rotor slots stator slots are exact multiple of rotor slots stator slots are not exact multiple of rotor slots none of the above Check Answer
Which motor is preferred for use in mines where explosive gases exist? Mark as favorite Copy Link Air motor Induction motor D.C. shunt motor Synchronous motor Check Answer