Electrical Machines The leakage reactance of a 3-phase alternator is determined by performing short circuit and slip tests. zero power factor and slip tests. open circuit and short circuit tests. open circuit and zero power factor tests. short circuit and slip tests. zero power factor and slip tests. open circuit and short circuit tests. open circuit and zero power factor tests. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is/are effects of armature reaction? increases the design cost All of these increase the iron loss increase the maintenance and repair increases the design cost All of these increase the iron loss increase the maintenance and repair ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a single phase transformer the magnitude of leakage reactance is twice that of resistance of both primary and secondary. With secondary short circuited, the input power factor is 1/3 1/√5 2/√5 1/√2 1/3 1/√5 2/√5 1/√2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The slip of an induction motor during DC rheostatic braking is 2 - s. 1 - s. 2 + s. s. 2 - s. 1 - s. 2 + s. s. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 5 KVA transformer has a turns ratio of N1/N2 = 10. The impedance of primary winding is 3+j5 ohms while that of secondary winding is 0.5+j0.8 ohms. The impedance of transformer when referred to primary will be 53+j85 ohms 8+j13 ohms 3.5+j5.8 ohms 3.05+j5.08 ohms 53+j85 ohms 8+j13 ohms 3.5+j5.8 ohms 3.05+j5.08 ohms ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ, 6 pole, 50 Hz IM has a rotor speed of 987 rpm find rotor frequency? 60 Hz. 0.70 Hz. 0.65 Hz. 0.75 Hz. 60 Hz. 0.70 Hz. 0.65 Hz. 0.75 Hz. ANSWER DOWNLOAD EXAMIANS APP
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