DC Generator Quiz

1. What is the main function of a DC generator?

2. Which component of the DC generator induces voltage by cutting through the magnetic field?

3. What is the role of the commutator in a DC generator?

in with operation?

4. What material are brushes typically made of in a DC generator?

5. In which type of DC generator are the field windings powered by an external DC source?

6. Which type of DC generator provides very high starting torque but poor voltage regulation?

7. What maintenance check should be done monthly on a DC generator?

8. What is the main symptom of worn or poorly tensioned brushes?

9. Which DC generator type combines both shunt and series windings for balanced performance?

10. What is the correct step sequence in DC generator operation?

11. A generator shows excessive sparking at the commutator. Based on the fault table, what is the MOST likely cause?

12. During inspection, you find deep grooves and pitting on the commutator surface. What maintenance action should be performed?

13. A generator’s insulation resistance test shows < 1 MΩ between windings and frame. What does this indicate?

14. You are asked to select a DC generator for powering a small workshop with lighting circuits. Which type is most suitable?

15. A crane requires a generator with very high starting torque. Which type would you recommend?

16. Which component should be lubricated with marine-grade grease, taking care not to contaminate windings?

17. An apprentice measures the open-circuit voltage of a DC generator, but the value is much lower than rated. Which fault is MOST likely?

18. A generator is needed for stable, precise voltage control in a laboratory. Which type would best fit this application?

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