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DIRECT CURRENT GENERATORS THEIR FAULTS CAUSES AND REMEDIES MCQs – CHAPTER 6 DAE

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1. What is the most likely cause of loss of output voltage in a DC series generator?





2. What is the most likely cause of sparking at the brushes in a DC series generator?





3. What is the most likely cause of overheating of the armature in a DC series generator?





4. What is a possible remedy for field winding failure in a DC series generator?





5. What is a possible remedy for armature winding failure in a DC series generator?





6. What is a possible remedy for commutator and brush failure in a DC series generator?





7. What is a symptom of reversed polarity of the field windings in a DC series generator?





8. What is a symptom of open circuits in the armature windings in a DC series generator?





9. What is the most likely cause of high armature current in a DC shunt generator?





10. What is the most likely cause of failure to build up voltage in a DC shunt generator?





11. What is the most likely cause of sparking at the brushes in a DC shunt generator?





12. What is a possible remedy for loss of field excitation in a DC shunt generator?





13. What is a possible remedy for loss of residual magnetism in a DC shunt generator?





14. What is a possible remedy for armature reaction in a DC shunt generator?





15. What is the most likely cause of loss of output voltage regulation in a DC compound generator?





16. What is the most likely cause of excessive output voltage rise in a DC compound generator?





17. What is the most likely cause of negative output voltage regulation in a DC compound generator?





18. What is a possible remedy for loss of compounding in a DC compound generator?





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