Electrical Machines In auto transformer if the turn ratio is K, what is the power transferred inductively? None of these (1-K) × input power both A and B K × input power None of these (1-K) × input power both A and B K × input power ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The heat transfer by convection in a transformer least depends on air velocity. temperature difference. color of the paint. surface area. air velocity. temperature difference. color of the paint. surface area. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The maximum power developed in cylindrical synchronous machine is occurs at a load angle of less than 90o. 90o. 0o. Greater than 90o. less than 90o. 90o. 0o. Greater than 90o. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two transformers with identical rating, are designed with flux densities of 1.2 and 1.4 Wb / m2 respectively. The weight of first transformer per kVA is less than that of second transformer. equal to that of second transformer. none of these. more than that of second transformer. less than that of second transformer. equal to that of second transformer. none of these. more than that of second transformer. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Under which of the following conditions hunting of synchronous motor is likely to occur ? Over-excitation. Over-loading for long period. Periodic variation of load. Small and constant load. Over-excitation. Over-loading for long period. Periodic variation of load. Small and constant load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following statement is correct, if short circuit ratio is high? High voltage regulation Good voltage regulation None of these Low short circuit current High voltage regulation Good voltage regulation None of these Low short circuit current ANSWER DOWNLOAD EXAMIANS APP
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