1.In a 3-phase squirrel cage induction motor, rotor conductors are shorted or opened.
Why the rotor slots are slightly skewed in squirrel cage induction motor? What is the effect of change in supply voltage on starting torque of induction motor? List out the methods Of speed control of cage type 3 phase induction motor. Why single phase induction motor is not self starting? Mention any one method of starting. The rotor in the squirrel cage induction motor are shorted end to end by aluminium bars; however the are placed parallel at a certain skew angle.
2.The rotor of a 3-phase wound rotor induction motor it provided with 1-phase or 3-phase winding.
3.In an induction motor, if the air gap is increased, the power factor will ___
4.The rotor slots are slightly skewed in squirrel cage induction motor to reduce ___
5.The operation of induction motor is based on ___
The Rotor Slots Are Slightly Skewed In Squirrel Cage Induction Motor In Order To *
6.The rotor of an induction motor never runs at synchronous speed because then the relative speed between the rotating flux and rotor will be ___
7.An induction motoris in general analogous to ___
A:two winding transformer with secondary short-circuited
8.The speed between starter and rotor fields, in an induction motor will be equal to ___
9.A 3-phase induction motor at slip āsā. Ifits two supply loads are interchanged, then its slip at that instant will be equal to ___
10.In a 3-phase induction motor, the torque developed is maximum when the rotor circuit resistance per phase is equal to ___
A:slip times the rotor leakage reactance per phase at stand still
11.Breakdown torque of a 3-phase induction motor of negligible stator impedance is___ proportional to the rotor leakage reactance.
12.In a 3-phase motor iron loss mainly occurs in ___
13.In an induction motor slip depends on what rotor circuit parameters
14.In a 3-phase induction motor, the mechanical power developed in terms of air gap power is ___
15.The stator referred resistance in the equivalent circuit of an induction motor , representing mechanical o/p is ___
16.Blocked rotor test of an induction motor corresponds, in case of a transformer to ___
17.When the induction motor is stand still the slip is ___
18.The crawling in the induction motor is caused by ___
The Rotor Slots Are Slightly Skewed In Squirrel Cage Induction Motor In Order To Mcq
19.Pole charging method of speed control is used in ___ type of transformer.
20.In v/f speed control of 3-phase induction motor with increase in frequency, the maximum torque and slip at which max torque occurs, would respectively ___
21.In a 3-phase induction motor if supply voltage and frequency are reduced by the same ratio then slip at which max torque occurs is ___
22.The absolute speed of magnetic field in space of a 3-phase rotor fed induction motor is ___
23.Rotor resistance speed control is used in ___ type of induction motor.
24.While breaking a 3-phase induction motor, its terminals were switched over to a dc source from ac supply, the method of breaking is___
c) eddy-current brakingd) none
25.In a 3-phase induction motor, the regenerative braking occurs when ___