The magnetising current drawn by a 3 phase induction motor is about _______ of full load stator current. 30 to 50% 5% 10 to 15% 15 to 20 % TRUE ANSWER : ? YOUR ANSWER : ?
In induction motor, percentage slip depends on Copper losses in motor Supply frequency None of these Supply voltage TRUE ANSWER : ? YOUR ANSWER : ?
When the rotor of a 3-phase induction motor is blocked, the slip is _____ 0 0.5 1 0.1 TRUE ANSWER : ? YOUR ANSWER : ?
The rotor of an induction motor runs at Any of the above Above synchronous speed Below synchronous speed Synchronous speed TRUE ANSWER : ? YOUR ANSWER : ?
The starting torque of an induction motor is maximum when rotor resistance per phase is _____ rotor reactance / phase. Equal to Four times Two times None of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
The rotor winding of a 3phase wound rotor induction motor is generally _______ connected. Star Partly star and partly delta Delta None of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
In medium sized induction motor, the slip is generally around 0.04 % 0.4 % 14% 4 % TRUE ANSWER : ? YOUR ANSWER : ?
For higher efficiency of 3-phase induction motor, the slip should be 1 As small as possible Large Very large TRUE ANSWER : ? YOUR ANSWER : ?
In a 3 phase induction motor, the rotor speed is _____ the synchronous speed. Smaller than Greater than None of the listed here Equal to TRUE ANSWER : ? YOUR ANSWER : ?
In the circle diagram for induction motor, the diameter of the circle represents Line voltage Rotor current Running torque Slip TRUE ANSWER : ? YOUR ANSWER : ?