Which of the listed faults can only be...

Question 1 / 205eccefa3bacbc34ba4d48097

Question 1 of 205eccefa3bacbc34ba4d48097

Which of the listed faults can only be eliminated by turning or grinding the face of a commutator with a rigidly supported tool?

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Question 1 of 20

5eccefa3bacbc34ba4d48097

Which of the listed faults can only be eliminated by turning or grinding the face of a commutator with a rigidly supported tool?

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🔍 Key Concepts

• Commutator maintenance methods: undercutting mica vs. machining the copper surface • The difference between surface defects (on the copper bars) and insulation issues (mica between bars) • How faults like sparking or brush angle are usually corrected (mechanical adjustment vs. machining)

💭 Think About

• Ask yourself: Which option describes a defect that is part of the physical shape/roundness of the commutator itself, not just adjustment or cleaning? • Which fault cannot be fixed by changing brushes, their position, or undercutting the mica, but needs the commutator surface to be re-machined? • For each choice, think: Is this normally corrected by tool adjustment / brush setting, or by actually turning/grinding the commutator on a lathe or similar rigid setup?

✅ Before You Answer

• For each choice, decide if it is mainly a problem of geometry/roundness of the commutator surface or of brush/insulation setting. • Recall that high mica is normally treated by undercutting the insulation between bars, not by reshaping the copper bars themselves. • Double-check which of the listed faults is a fundamental out-of-true condition of the rotating surface that requires a rigidly supported cutting or grinding tool.

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Question 1 of 20

Which of the listed faults can only be eliminated by turning or grinding the face of a commutator with a rigidly supported tool?

Eccentricity

High mica

Sparking brushes

Incorrect brush angle

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Question 1 / 205eccefa3bacbc34ba4d48097

Question 1 of 205eccefa3bacbc34ba4d48097

Which of the listed faults can only be eliminated by turning or grinding the face of a commutator with a rigidly supported tool?

Back

Question 1 of 20

5eccefa3bacbc34ba4d48097

Which of the listed faults can only be eliminated by turning or grinding the face of a commutator with a rigidly supported tool?

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