The voltmeter connected across a generator reads voltage same at no load and at full load (rated). The generator is of the type series generator. short - shunt generator. level compound. shunt generator. TRUE ANSWER : ? YOUR ANSWER : ?
No load primary current in a transformer leads the applied voltage somewhat less than 90Ã& leads the applied voltage by exactly 90Â& lags behind applied voltage by exactly 90Â&am lags behind applied voltage somewhat less than 90à TRUE ANSWER : ? YOUR ANSWER : ?
Armature reaction depends on which of the following? power factor of load magnitude of load current None of these both 1 and 2 TRUE ANSWER : ? YOUR ANSWER : ?
In synchronous generator V curve is drawn between field current on X-axis and power factor on Y-axis. field current on Y-axis and armature current on X-axis. either of these. field current on X-axis and armature current on Y-axis. TRUE ANSWER : ? YOUR ANSWER : ?
Lamination of transformer core is made of cast iron. wrought iron. cast steel. silicon steel. TRUE ANSWER : ? YOUR ANSWER : ?
In above questions, find the power delivered by each of the alternators to a load of impedance 6Ω(resistive) 3190 W, 5040 W. 6000 W, 7000 W. 1000 W, 5040 W. 100 W, 2000 W. TRUE ANSWER : ? YOUR ANSWER : ?
In a 6 pole DC machine, 90 mechanical degrees correspond to which of the following electrical degree? 180. 270. 45. 30. TRUE ANSWER : ? YOUR ANSWER : ?
The armature mmf in a dc machine is 1. stationary with respect to field poles 2. stationary with respect to armature 3. rotating with respect to field poles 4. rotating with respect to armature From these, the correct answer is 2, 4 1, 4 1, 3 2, 3 TRUE ANSWER : ? YOUR ANSWER : ?
A dc shunt generator, when commissioned after a major repair of the field system, failed to build Up voltage. It was because field winding was wrongly connected field resistance was higher than critical resistance field system lost residual magnetism there was a break in the armature circuit TRUE ANSWER : ? YOUR ANSWER : ?
Hysteresis loop represents the area of total iron losses eddy current loss copper loss hysteresis loss TRUE ANSWER : ? YOUR ANSWER : ?