Electrical Machines Considering a galvanometer is connected to the rotor of a 3 - Φ, 4 pole, 50 Hz IM and is making 130 oscillations in a minute, then calculate the rotor speed? 1450. 1500. 1435. 1440. 1450. 1500. 1435. 1440. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Where the shunt generators are widely used? Where voltage variation is needed over a wide load range. Where the load is very high. Where often load fluctuation is occurred. Where a constant voltage is required over a narrow load range. Where voltage variation is needed over a wide load range. Where the load is very high. Where often load fluctuation is occurred. Where a constant voltage is required over a narrow load range. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following pairs is/are correct? semi closed slot-----leakage flux is moderate All of these closed slot----- leakage flux is high open slot----- leakage flux is less semi closed slot-----leakage flux is moderate All of these closed slot----- leakage flux is high open slot----- leakage flux is less ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Mechanical energy is supplied to DC generator at the rate of 4200 J / s. The generator delivers 32.2 Amp at 120 V. What is the percentage efficiency of the generator? 210 V. 212 V. 201.02 V. 205 V. 210 V. 212 V. 201.02 V. 205 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 250 V DC generator in run at rated speed with no excitation. The open circuit voltage will be zero. very small, say about 2 or 3 V. 250 V. about 100 V. zero. very small, say about 2 or 3 V. 250 V. about 100 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In field flux method speed control of DC Motor is constant torque drive below the base speed. constant torque drive above the base speed. constant hp drive below the base speed. constant power drive above base speed. constant torque drive below the base speed. constant torque drive above the base speed. constant hp drive below the base speed. constant power drive above base speed. ANSWER DOWNLOAD EXAMIANS APP
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