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Electric motors Quiz 2
KLE Dr. M. S. Sheshgiri College of Engineering and Technology, Belagavi Department of Electrical And Electronics Engineering QUIZ -2 Code: 15EE44 Subject: Electric motors Semester: IV Date: 03/02/2018 Staff : Prof. Abhinay Gupta 1. The function of ____ in dc generator is to collect current from commutator and deliver it to external circuit Dummy Coils Brushes Equalizer rings End rings 2. In DC Motor speeds above the rated speed can be attained by varying which of the following winding current Either Filed winding or Armature winding Armature winding Field Winding 3. The main advantage of dc motors compared to ac motors are: (Choose multiple answers) High Starting Torque Speed Control Less Maintenance Low Cost 4. The emf produced in dc generator is ___ induced emf: Dynamically Statically Electrostaticall
QUIZ-I (Electric Motors)
QUIZ -I Code: 15EE44 Subject: Electric motors Semester: IV Date: 03/02/2018 Staff : Prof. Abhinay Gupta 1. The speed of a DC motor is ….. directly proportional to back emf directly proportional to flux inversely proportional to product of flux and back emf always constant 2. As the load on DC shunt motor increased, its speed ….. increases slightly remains constant increases proportionately reduces slightly 3. In a dc motor, unidirectional torque is produced with the help of ……. end plates both brushes and commutator commutator brushes 4. The starting resistance of DC motor is usually ………….. 200 ohm infinitely large large small 5. T he DC Motor which has approximately constant speed …… shunt motor cumulatively compound motor series motor differently compound motor 6