Question

what precautions should one follow while reading a scale. ​

Answer 1

Precautions should one follow while reading a scale:

• The scale should be placed to the side of the object being measured.
• scale should be placed to the side of the object being measured. It should also be in touch with the object being measured.
• scale should be placed to the side of the object being measured. It should also be in touch with the object being measured. While reading the scale, eye must be placed vertically above the scale mark being read.

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Answer 2

Explanation:

Keep the ruler exactly along the length to be measured.

Do not use worn out portions of the instrument. Very often, the markings at the ends of a ruler get erased due to overuse.

Keep your eye vertically above the where the measurement is to be taken.

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