Which of the following materials is...

Question 1 of 270705eccefa4bacbc34ba4d484bc

Which of the following materials is recommended for burnishing the slip rings of an alternator after grinding or turning?

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Question 1 of 27070

Q

Which of the following materials is recommended for burnishing the slip rings of an alternator after grinding or turning?

🔍 Key Concepts

• Alternator slip rings need a very smooth, even surface after grinding or turning to prevent brush wear and arcing. • The burnishing material must be fine enough not to score the copper, but still remove small roughness and high spots. • Think about which materials can embed abrasive particles (bad for slip rings) versus which provide a controlled, fine abrasion.

💭 Think About

• Which choice would actually produce a very fine, uniform finish on copper without leaving deep scratches? • Which option is commonly used as a burnishing (polishing) tool rather than a cutting/shaping tool? • Consider which material is flexible enough to conform to the circular shape of the slip rings while the alternator is turning.

✅ Before You Answer

• Eliminate any tool that is normally used for cutting or shaping metal, not polishing it. • Ask yourself which option provides a very fine abrasive action suitable for finishing electrical contact surfaces. • Avoid materials that could leave embedded grit or fibers in the slip ring surface that would damage the brushes.