The auto-starters (using three auto transformers) can be used to start cage induction motor of the following type__________?

A. D.C. compound motor
B. D.C. series motor
C. synchronous motor
D. asynchronous motor

A. rotor leakage reactance
B. stator reactance
C. the reactive lagging magnetizing current necessary to generate the magnetic flux
D. all of the above

A. frequency
B. rotor inductive reactance
C. square of supply voltage
D. all of the above

A. 0.2 lagging
B. 0.2 leading
C. 0.5 leading
D. unity

A. rotor conductor ends are short-circuited through slip rings
B. rotor conductors are short-circuited through end rings
C. rotor conductors are kept open
D. rotor conductors are connected to insulation

A. slip ring induction motor
B. squirrel cage induction motor
C. both A. and (b)
D. none of the above