Brushes require a running-in period before they operate at their best. What is the term for this period?

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Multiple Choice

Brushes require a running-in period before they operate at their best. What is the term for this period?

Explanation:
The term for that initial period when new brushes wear in to seat properly against the surface is running-in. This process lets the brush and the contact surface conform to each other, smoothing out microscopic irregularities so current transfer becomes stable and wear is distributed more evenly. The standard technical spelling is hyphenated as running-in, signaling this specific wear-in period. Other options don’t describe this brush seating process: breaking-in is used in different contexts, and holding-pattern isn’t related to tool or component wear-in.

The term for that initial period when new brushes wear in to seat properly against the surface is running-in. This process lets the brush and the contact surface conform to each other, smoothing out microscopic irregularities so current transfer becomes stable and wear is distributed more evenly. The standard technical spelling is hyphenated as running-in, signaling this specific wear-in period. Other options don’t describe this brush seating process: breaking-in is used in different contexts, and holding-pattern isn’t related to tool or component wear-in.

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