28) No-load current of an induction motor is approximately _____ percent of full-load current.

29) In a D.O.L. starter a NVC is connected across a phase and neutral of a 3-phase, 415 V, 50 Hz supply and it works normally. What is the rating of NVC ?

30) A D.O.L. starter can be used satisfactorily for a double cage squirrel cage induction motor up to :

31) The purpose of a back-up fuse is to provide protection against :

32) A 4-pole, 3-phase, 50 Hz motor's speed is 95% of its synchronous speed then the actual speed of the motor is :