Electrical Machines A transformer has maximum efficiency at 3/4 load. The ratio of iron loss and full load copper loss is 4/3. 16/9. 9/16. 3/4. 4/3. 16/9. 9/16. 3/4. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If in a sub – station there is one 132 / 33 kV transformer whose secondary is connected with primary of one 33 / 11 kV transformer, the total transformation ratio of the sub – station will be, 4. 3. 7. 12. 4. 3. 7. 12. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole DC generator runs at 750 rpm and generate an emf of 240 V. The armature is wave wound and has 792 conductors. If the total flux from each pole is 0.0145 Wb. What is the leakage co-efficient? 1.4. 1.5. 1.8. 1.2. 1.4. 1.5. 1.8. 1.2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ward Leonard control provides speed control in one direction only. below rated speed. in both direction. above rated speed. in one direction only. below rated speed. in both direction. above rated speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines We can apply source transformation to voltage source when a resistance is connected to it in 14 HP. 15 HP. 13 HP. 10 HP. 14 HP. 15 HP. 13 HP. 10 HP. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ward-Leonard system for controlling the speed of a DC motor is used where Very fine speed control over the whole range from zero to normal speed is required. All of above. The accuracy in speed control is required. The speed in both the direction is required. Very fine speed control over the whole range from zero to normal speed is required. All of above. The accuracy in speed control is required. The speed in both the direction is required. ANSWER DOWNLOAD EXAMIANS APP
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