In general, what can cause D.C. propulsion...

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Question 1 of 205eccefa3bacbc34ba4d4809b

In general, what can cause D.C. propulsion motor brush sparking to be excessive?

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5eccefa3bacbc34ba4d4809b

In general, what can cause D.C. propulsion motor brush sparking to be excessive?

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🔍 Key Concepts

• DC propulsion motor brushes and how they make contact with the commutator • What good commutator condition looks like (color, roundness, surface) • How brush grade, spring pressure, and position affect sparking

💭 Think About

• Think about which choice describes faults or problems rather than normal or even desirable conditions in a DC motor • Ask yourself: which items would a motor technician deliberately aim for when setting up a motor, and which would they try to correct? • Consider how poor contact between brushes and the commutator could lead to arcing or sparking—what specific factors would interfere with smooth contact?

✅ Before You Answer

• Identify which answers describe proper/normal commutator condition versus abnormal/faulty condition • Check which factors directly affect brush contact pressure, material behavior, and alignment with the commutator • Eliminate any option that sounds like a desired design feature rather than a cause of trouble

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Question 1 of 205eccefa3bacbc34ba4d4809b

In general, what can cause D.C. propulsion motor brush sparking to be excessive?

Back

Question 1 of 20

5eccefa3bacbc34ba4d4809b

In general, what can cause D.C. propulsion motor brush sparking to be excessive?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed