In a double squirrel cage induction motor, the outer cage winding has _______ Low resistance None of the listed here High inductance High resistance TRUE ANSWER : ? YOUR ANSWER : ?
The starting torque of an induction motor is maximum when rotor resistance per phase is _____ rotor reactance / phase. Two times Four times Equal to None of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
In an induction motor, the ratio of rotor cu loss and rotor input is given by 1-S S/1-S 1/S S TRUE ANSWER : ? YOUR ANSWER : ?
In an induction motor if air gap increased Copper loss will reduce Windage losses will be more The power factor will be low Bearing friction will reduce TRUE ANSWER : ? YOUR ANSWER : ?
The frame of an induction motor is usually made of Aluminium Cast iron Silicon steel Bronze TRUE ANSWER : ? YOUR ANSWER : ?
The term cogging is associated with Compound generators Induction motors Dc series motors Three phase transformer TRUE ANSWER : ? YOUR ANSWER : ?
DOL starting of induction motors is usually restricted to High horsepower motors Variable speed motors Low horsepower motors High speed motors TRUE ANSWER : ? YOUR ANSWER : ?
The 3- phase induction motor is so designed that the rotor should have ______ under running conditions. Low resistance High reactance high resistance Large slip TRUE ANSWER : ? YOUR ANSWER : ?
In induction motor, percentage slip depends on Supply voltage None of these Copper losses in motor Supply frequency TRUE ANSWER : ? YOUR ANSWER : ?
Very large 3-phase induction motors (greater than 25 HP) are started _____ By auto transformer starting Star-delta starting Direct on line None of the listed here TRUE ANSWER : ? YOUR ANSWER : ?