Questions and Answers on a measurement instrument Least Count

This exercise includes commonly asked exam and interview questions on measurement instrument least count. Least Count of an instrument is an important parameter for instrument selection. We recommend you read this article on What is the Least Count and how to calculate it before trying this exercise.

This exercise and list of Questions and answers will help you in your exam and interview and build your understanding of measurement instrument least count.

Please note, Negative marking is applicable. Please do not attempt question where you are in doubt.

Quiz Questions and Answers on Least Count

Welcome to your Exercise on Least Count of an instrument

Select the Statement that is true for the least count of an instrument.

What is the Least Count of the scale/ruler (in mm) shown above?
This image Shows a Ruler.

Calculate its Least count of an instrument with a main scale and secondary scale (eg. Mechanical Vernier). Smallest Reading on main scale = 1cm, Number of divisions on main scale = 10, Number of divisions on secondary scale = 10.

Select the instrument with minimum least count.

Select the correct statement for an instrument Least Count (select any two answers).

Which of the following instruments have maximum least count?

What action you will take if your existing instrument is not accurately measuring a parameter?

Which of following instrument is best choice to measure 6±0.25 Volt.

If all of your answers are not correct, we recommend to again read this article on What is the Least Count and how to calculate it? 

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