As load on an induction motor goes on increasing Its power factor remains constant Its power factor goes on increasing even after full load Its power factor goes on decreasing Its power factor goes on increasing up to full load and then it falls again TRUE ANSWER : ? YOUR ANSWER : ?
The shaft of induction motor is made of Flexible Stiff Hollow Any of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
Slip rings are usually made of Aluminium Copper Carbon Phospor bronze TRUE ANSWER : ? YOUR ANSWER : ?
The torque developed in the cage induction motor with auto-starter is k/torque with direct switching K2 × torque with direct switching k2/torque with direct switching K × torque with direct switching TRUE ANSWER : ? YOUR ANSWER : ?
The approximate efficiency of a 3-phase , 50 Hz, 4 pole induction motor running at 1350 rpm is ______ 65% None of the listed here 40% 90% TRUE ANSWER : ? YOUR ANSWER : ?
In a squirrel cage induction motor, the number of stator slots is _______ rotor slots. Either more or less than the number of Always eqaul to the number of Always greater than the number of Always less than the number of TRUE ANSWER : ? YOUR ANSWER : ?
Very large 3-phase induction motors (greater than 25 HP) are started _____ Star-delta starting Direct on line By auto transformer starting None of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
The torque developed by a 3 phase induction motor least depends on Rotor current Rotor power factor Rotor emf Shaft diameter TRUE ANSWER : ? YOUR ANSWER : ?
In a squirrel cage induction motor, the number of rotor bars is generally ________ None of the listed here Equal to stator poles Even number Prime number TRUE ANSWER : ? YOUR ANSWER : ?
If an induction motor is running at slip S, then rotor output is ______ (S-1) × rotor input (1+S) × rotor input (1-S) × rotor input S × rotor input TRUE ANSWER : ? YOUR ANSWER : ?