Electrical Machines A DC cumulatively compounded motor delivers rated load torque at rated speed. If the series field is short-circuited, then the armature current and speed will both increase increase and decrease respectively both decrease decrease and increase respectively both increase increase and decrease respectively both decrease decrease and increase respectively ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If starting current of a 3 - Φ induction motor is 5 times the rated current, while rated slip is 4 %, then ratio of starting torque to full load torque is 0.8. 0.4. 0.6. 1. 0.8. 0.4. 0.6. 1. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For high current and low voltage rating which winding is employed to DC machine? Lap winding. Wave winding. Both wave and lap winding. No wave and lap winding. Lap winding. Wave winding. Both wave and lap winding. No wave and lap winding. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To get the speed of DC motor is more than normal without wastage of electrical energy _____________ is used. Ward Leonard control. None of above. Rheostatic control. Any of above method. Ward Leonard control. None of above. Rheostatic control. Any of above method. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC Shunt Motor having shunt field resistance of 250 Ω and armature resistance of 0.5 Ω is connected to 250 V supply and load current of 21 A. What is the back emf generated ? 240 V. 150 V. 210 V 230 V. 240 V. 150 V. 210 V 230 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The use of double squirrel cage winding on the rotor provides higher efficiency. a large starting torque. low noise. reduced starting torque. higher efficiency. a large starting torque. low noise. reduced starting torque. ANSWER DOWNLOAD EXAMIANS APP
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