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

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?
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  • A I, II and IV only .
  • B I and II only
  • C II and III only
  • D III and IV only
Correct Answer: Option 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.

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