The rotor of induction motor Insufficient data Always revolves in the direction of stator flux Always revolves in the direction opposite to stator flux None of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
An induction motor is preferred to a dc motor because it _______ Provides high starting torque Provides fine speed control None of the listed here Has simple and rugged construction TRUE ANSWER : ? YOUR ANSWER : ?
In an induction motor the relationship between stator slots and rotor slots is that None of the listed here Stator slots are not exact multiple of rotor slots Stator slots are exact multiple of rotor slots Stator slots are equal to rotor slots TRUE ANSWER : ? YOUR ANSWER : ?
In the circle diagram for induction motor, the diameter of the circle represents Line voltage Running torque Slip Rotor current TRUE ANSWER : ? YOUR ANSWER : ?
The maximum torque of a 3-phase induction motor under running conditions is Inveresly proportional to supply voltage Directly proportional to rotor resistance inversely proportional to rotor reactance at standstill None of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
The frame of an induction motor is usually made of Bronze Cast iron Aluminium Silicon steel TRUE ANSWER : ? YOUR ANSWER : ?
For the same kVA rating, the leakage flux in induction motor is _______ that of transformer. More than About the same None of the listed here Less than TRUE ANSWER : ? YOUR ANSWER : ?
The stator of a three phase induction motor produces _______ magnetic field. Rotating Alternating Steady None of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
The condition of induction motor on load resemble those of a transformer whose secondady is _______ Short circuited Supplying a variable resistive load Open circuited None of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
The frequency of rotor current in a 6-pole , 50 Hz, 3-phase induction motor running at 950 rpm is 1.5 Hz 5 Hz 0.05 Hz 2.5 Hz TRUE ANSWER : ? YOUR ANSWER : ?