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# I. Diameter of a small ball bearing.II. Thickness of a pieces of paper.III. Diam...

### Question

I. Diameter of a small ball bearing.

II. Thickness of a pieces of paper.

III. Diameter of a measuring cylinder.

IV. Length of a piece of wire.

Which of the above can be measured using a micrometer screw gauge?

### Options

A) I, II and IV only .

B) I and II only

C) II and III only

D) III and IV only

The correct answer is B.

### Explanation:

Of all the instruments used in measuring length,the micrometer screw gauge has the highest reading accuracy (0.01 mm), and is therefore used in measuring very small length such as diameter of a small ball bearing, and thickness of a piece of paper.

## Dicussion (1)

• Of all the instruments used in measuring length,the micrometer screw gauge has the highest reading accuracy (0.01 mm), and is therefore used in measuring very small length such as diameter of a small ball bearing, and thickness of a piece of paper.

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