Which part of Vernier calipers is used to measure depth?

Which part of Vernier calipers is used to measure internal dimensions?

If the zero of the Vernier scale is to the right of the zero of the main scale, the instrument shows:

The least count of the Vernier calipers described in the chapter is:

If the zero of the Vernier scale is to the left of the zero of the main scale, the correction is made by:

Vernier calipers are mainly used to measure:

A micrometer screw gauge is more suitable than Vernier calipers for measuring:

Why should the zero mark of a metre rule coincide with one edge of the object?

The least count of the micrometer screw gauge described in the chapter is:

Which practice helps reduce parallax error while using a metre rule?

In a micrometer screw gauge, the ratchet is used to: