Electrical Machines Transformer cooling and insulating oil must be of low viscosity. low resistivity. high viscosity. low BDV. low viscosity. low resistivity. high viscosity. low BDV. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following induction motor has the highest starting torque? None of these Slip ring induction motor. Same in both induction motors. Squirrel cage induction motor. None of these Slip ring induction motor. Same in both induction motors. Squirrel cage induction motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motors has negative speed regulation? Both B and C. Shunt motors. Differential compound motors. Series motors. Both B and C. Shunt motors. Differential compound motors. Series motors. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 240 V dc series motor takes 40 A when giving its rated output at 1500 rpm. Its resistance is 0.3 Ω. The value of resistance which must be added to obtain rated torque at 1000 rpm is 5.7 Ω 6 Ω 2.2 Ω 1.9 Ω 5.7 Ω 6 Ω 2.2 Ω 1.9 Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Short circuit test is performed on a transformer with a certain impressed voltage at rated frequency. If the short circuit test is now performed with the same magnitude of impressed voltage, but at frequency higher than the rated frequency then The magnitude will both increase. The magnitude of current will decrease but the power factor will increase. The magnitude of circuit as well as the power factor will decrease. The magnetude of current will increase, but power factor will decrease. The magnitude will both increase. The magnitude of current will decrease but the power factor will increase. The magnitude of circuit as well as the power factor will decrease. The magnetude of current will increase, but power factor will decrease. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machines shape of net flux density is? sine wave saddle shape peaky in nature flat tapped or trapezoidal sine wave saddle shape peaky in nature flat tapped or trapezoidal ANSWER DOWNLOAD EXAMIANS APP
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