Question

Which of the following is not necessary while measuring length ?

• A. Placing the scale in contact with the object along its length.
• B. Using full mark of the scale which is not broken.
• C. Placing the eye exactly in front of the point where the measurement is to be taken
• D. Using clean hands to make measuements

Answer 1

The correct option is D Using clean hands to make measuements

While measuring the length of the object, some precautions must be taken for accurate measurement. Scale should be placed in contact with the object along its length and broken scale should not be used. We must place the eye exactly in front of the point where the measurement is to be taken.

But the cleansing of hands has nothing to do with the measurement of length. THus option D is correct.