The shaft of synchronous motor is made of? Mark as favorite Copy Link mild steel chrome steel alnico stainless steel Check Answer
If one-phase of a 3-phase synchronous motor is short-circuited, motor? Mark as favorite Copy Link will refuse to start will overheat in spots will not come up to speed will fail to pull into step Check Answer
In case one phase of a· three-phase synchronous motor is short-circuited the motor will? Mark as favorite Copy Link not start run at 2/3 of synchronous speed run with excessive vibrations take less than the rated load Check Answer
If the field winding of an unloaded salient pole synchronous motor is open circuited, the motor will? Mark as favorite Copy Link stop run as induction motor function as static condenser burn with dense smoke Check Answer
A three-phase synchronous motor will have? Mark as favorite Copy Link no slip-rings one slip-ring two slip-rings three slip-rings Check Answer
Exciters of synchronous machines are? Mark as favorite Copy Link d.c. shunt machines d.c. series machines d.c. compound machines any of the above Check Answer
In a synchronous motor, V-curves represent relation between? Mark as favorite Copy Link armature current and field current power factor and speed field current and speed field current and power factor Check Answer
The magnitude of field flux in a 3-phase synchronous motor? Mark as favorite Copy Link remains constant at all loads varies with speed varies with the load varies with power factor Check Answer
A synchronous motor has better power factor as compared to that of an equivalent induction motor. This is mainly because? Mark as favorite Copy Link synchronous motor has no slip stator supply is not required to produce magnetic field mechanical load on the rotor remains constant synchronous motor has large air gap Check Answer
Hunting in a synchronous motor cannot be due to? Mark as favorite Copy Link windage friction variable load variable frequency variable supply voltage Check Answer