The purpose of interpoles in DC machines is to nullify The cross-magnetizing effect of armature mmf Both the cross-magnetizing mmf and the reactance voltage The reactance voltage The demagnetizing effect of armature mmf TRUE ANSWER : ? YOUR ANSWER : ?
People can interact with each other through any part of the world through video conferencing using Joystick Speaker Webcam Scanner TRUE ANSWER : ? YOUR ANSWER : ?
The motor used in celling fans is Capacitor start capacitor run motor Split phase motor Universal motor Capacitor start motor TRUE ANSWER : ? YOUR ANSWER : ?
Which type of back up protection is widely used for the protection of transmission lines? Remote backup Control backup Breaker backup Relay backup TRUE ANSWER : ? YOUR ANSWER : ?
The picture on the monitor of a computer is made up of tiny coloured dots called Icons Spots Pixels Points TRUE ANSWER : ? YOUR ANSWER : ?
Under operating conditions, the secondary of a current transformer is always short ciruited because It protects the secondary ciruits It avoids core saturation and high voltage induction It protects the primary ciruits It is safe to human beings TRUE ANSWER : ? YOUR ANSWER : ?
The main advantage of using fractional pitch winding is to refuce Size of the machine Amount of copper in the winding Cost of the machine Harmonics in the generated emf TRUE ANSWER : ? YOUR ANSWER : ?
The mutual inductance between two unity coupled coils of 9 H and 4 H is 2.2 H 13 H 6 H 36 H TRUE ANSWER : ? YOUR ANSWER : ?
Hysteresis in an instrument means The inaccuracy due to change in temperature The reliability of the instrument The repeatability of the instrument The change in the same reading when the input is first increased and then decreased TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following correctly represents the sequence of operations of isolator, circiut breaker and earthing switch while opening a circuit? Open circuit breaker-open isolator-close earthing switch Close earthing switch - open ciruit- breaker-open islotor Close circuit breaker-close isolator - open earthing switch Open isolator close circuit breaker-open earthing switch TRUE ANSWER : ? YOUR ANSWER : ?