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Multiple Choice

Vernier calipers are graduated in increments of what?

Vernier calipers achieve a precise reading by using two scales: a main scale and a sliding Vernier scale. This combination lets you read measurements to a very small fraction of an inch. In typical inch-based calipers, the least count—the smallest increment you can discern directly—is one thousandth of an inch. This is built into the Vernier setup so that a division on the Vernier aligns with a division on the main scale every 0.001 inch. When you measure, you read the main scale for the whole inches, then find the Vernier line that lines up best with a main-scale line and add that many thousandths of an inch to the main-scale reading to get the final value. The other options describe coarser inch increments or a metric centimeter increment, which aren’t the standard imperial Vernier resolution.

Vernier calipers achieve a precise reading by using two scales: a main scale and a sliding Vernier scale. This combination lets you read measurements to a very small fraction of an inch. In typical inch-based calipers, the least count—the smallest increment you can discern directly—is one thousandth of an inch. This is built into the Vernier setup so that a division on the Vernier aligns with a division on the main scale every 0.001 inch. When you measure, you read the main scale for the whole inches, then find the Vernier line that lines up best with a main-scale line and add that many thousandths of an inch to the main-scale reading to get the final value. The other options describe coarser inch increments or a metric centimeter increment, which aren’t the standard imperial Vernier resolution.