Question

3.
The instrument used to measure the internal length of an object with accuracy is​

Answer 1

Answer:

Vernier Caliper

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Answer 2

Explanation:

The inside calipers are used to measure the internal size of an object. The upper caliper in the image (at the right) requires manual adjustment prior to fitting. Fine setting of this caliper type is performed by tapping the caliper legs lightly on a handy surface until they will almost pass over the object.