An induction motor is Self starting with low torque Self starting with high torque Non self starting Self starting with zero torque TRUE ANSWER : ? YOUR ANSWER : ?
The stator of a three phase induction motor produces _______ magnetic field. None of the listed here Steady Alternating Rotating TRUE ANSWER : ? YOUR ANSWER : ?
The starting torque of a squirrel cage induction motor is Slightly more than full load torque Negligible Same as full load torque Low TRUE ANSWER : ? YOUR ANSWER : ?
As load on an induction motor goes on increasing Its power factor goes on increasing up to full load and then it falls again Its power factor goes on increasing even after full load Its power factor goes on decreasing Its power factor remains constant TRUE ANSWER : ? YOUR ANSWER : ?
A four speed squirrel cage induction motor uses______ stator windings. Two Four Three One TRUE ANSWER : ? YOUR ANSWER : ?
If the rotor slots are made deeper, rotor resistance is ______ Decreased at starting None of the listed here Increased at starting Increased under running conditions TRUE ANSWER : ? YOUR ANSWER : ?
An induction motor is preferred to a dc motor because it _______ Has simple and rugged construction Provides fine speed control None of the listed here Provides high starting torque TRUE ANSWER : ? YOUR ANSWER : ?
The no load speed of an induction motor depends on The maximum flux/poles The number of its poles Both supply frequency and number of poles The supply frequency TRUE ANSWER : ? YOUR ANSWER : ?
The synchronous speed of a 3-phase induction motor having 20 poles and connected to a 50 Hz source is _____ 300 rpm 1200 rpm 1000 rpm 600 rpm TRUE ANSWER : ? YOUR ANSWER : ?
A 3 phase 440 v, 50 Hz induction motor has 4% slip. The frequency of rotor emf will be 50 Hz 20 Hz 2 Hz 200 Hz TRUE ANSWER : ? YOUR ANSWER : ?