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Wireman Practice Test: DC Machine
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Related: Wireman Practice Test: Basic Electronics 

Wireman Practice Test: DC Machine
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25 Questions

1. Demagnetizing component of armature reaction is……………………..
2. The Cross magnetizing component of armature reaction is…………………………..
3. Motor used in electric traction is……………………….
4. In a DC compound motor field regulator is provided to…………………..
5. What is the name of the speed control method of DC motor given below?
6. The armature torque of the DC series motor is directly proportional to ……………………..
7. What is the operation in the rewinding process given below?
8. By which material the yoke is made up of small DC generator ?
9. THE emf produced in the dc generator is…………….
10. When the armature of a DC motor rotates, emf induced is…………………………..
11. When a DC series motor is connected to AC supply , What will happen to the motor ?
12. In a DC generator the no of segments in commutator is equal to the number of …….
13. The efficiency of DC machine is maximum when…………………….
14. Laminated core are generally made of…………….
15. Body or yoke of a DC generator is made of…………..
16. The starting current of a 220V , 10HP shunt motor having an armature resistance of 0.2 ohms, without starter is …………………..
17. DC shunt motor are also called as…………….
18. DC shunt motor are commonly used in …………………
19. Fleming’s right hand rule is to identify the…………
20. The field winding of inter pole of a DC compound generator is connected……………………..
21. A 220V DC motor having an armature resistance 0.2 ohms and back emf 215V, it draws a current of……………………..
22. A DC generator works on the principle of…………..
23. Which type of armature winding is illustrated given below?
24. For parallel operation the generator normally preferred are………………………..
25. The shunt field of DC generator will have……………

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