Related Questions

In a split phase motor, the running winding should have
A high resistance and low inductance
B low resistance and high inductance
C high resistance as well as high inductance
D low resistance as well as low inductiance
In split-phase motor auxiliary winding is of
A thick wire placed at the bottom of the slots
B thick wire placed at the top of the slots
C thin wire placed at the top of the slots
D thin wire placed at the bottom of the slots
While starting a synchronous motor by induction motor action, field winding is usually
A connected to D.C. supply
B short-circuited by low resistance
C kept open-circuited
D none of the above
If the field winding of an unloaded salient pole synchronous motor is open circuited, the motor will
A stop
B run as induction motor
C function as static condenser
D burn with dense smoke
In case one phase of a three-phase synchronous motor is short-circuited the motor will
A Not start
B Run at $$\frac{2}{3}$$ of synchronous speed
C Run with excessive vibrations
D Take less than the rated load
In a split phase motor
A the starting winding is connected through a centrifugal switch
B the running winding is connected through a centrifugal switch
C both starting and running windings are connected through a centrifugal switch
D centrifugal switch is used to control supply voltage
Direction of rotation of a split phase motor can be reversed by reversing the connection of
A running winding only
B starting winding only
C either (A) or (B)
D both (A) and (B)
Temperature of the stator winding of a three phase induction motor is obtained by
A Resistance rise method
B Thermometer method
C Embedded temperature method
D All above methods
In a three-phase induction motor, the number of poles in the rotor winding is always
A Zero
B More than the number of poles in stator
C Less than number of poles in stator
D Equal to number of poles in stator
The starting winding of a single-phase motor is placed in
A Armature
B Field
C Rotor
D Stator

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