The slip of an induction motor during DC rheostatic braking is 2 - s. s. 1 - s. 2 + s. TRUE ANSWER : ? YOUR ANSWER : ?
Silicon content in steel lamination is kept within 5% as it increases hysteresis loss. makes the material brittle. All of these Increases cost. TRUE ANSWER : ? YOUR ANSWER : ?
The wound rotor type IM is used for____________ speed operation. variable. minimum. constant. maximum. TRUE ANSWER : ? YOUR ANSWER : ?
In speed control of DC shunt motor by varying field flux, what may be the value of field regulator? 0.2 ohm 2 ohm. 10 ohm 100 ohm TRUE ANSWER : ? YOUR ANSWER : ?
Slip exists in synchronous motor. none of above. in both machines. induction motor. TRUE ANSWER : ? YOUR ANSWER : ?
The size of inter poles is small as compared to main poles. What is the reason? In order to get more flux. All of these In order to not to get saturated. In order to get saturated. TRUE ANSWER : ? YOUR ANSWER : ?
When a DC cummulative compound wound motor is loaded Torque and speed both increase. Torque increase and speed decrease. Both torque and speed decrease. Torque decrease and speed increases. TRUE ANSWER : ? YOUR ANSWER : ?
The basic function of a transformer is to change the frequency the power level the power factor the level of the voltage TRUE ANSWER : ? YOUR ANSWER : ?
Reversing the direction of rotation of split phase motors is done by All of these reversing the terminals of starting winding. reversing the terminals of main winding. interchanging the capacitor from starting winding to main winding or vice versa. TRUE ANSWER : ? YOUR ANSWER : ?
The speed of a 3-phase induction motor operating in its stable region remains constant. decreases with increase in the load torque. increases with increase in the load torque. decreases with decrease in the load torque. TRUE ANSWER : ? YOUR ANSWER : ?