Question

How should you always read a graduated cylinder?

Answer 1

The graduated cylinder is one of the most common measuring devices in the field of science used to measure volumes of certain substances. We follow up the rule of meniscus while we read the calibrated graduated cylinder on board.

Complete answer: Let us discuss about the measurements carried out by the graduated cylinder;
Graduated cylinder-
It is basically the test tube with volume markings on it i.e. it is calibrated which can measure volumes accurately if the reader reads that properly.
Meniscus-
It is a small curve which is obtained between two phases when brought into contact i.e. can say due to capillary action. Meniscus is always a downward facing curve obtained between liquid surface and air.
Rule of meniscus-
The reader should always read the cylinder markings where the bottom of the meniscus lies i.e. when we place the graduated cylinder on the flat surface and we obtain a meniscus reading, do read that from the bottom of it.
The reader must place his eyes on the same level of the stable liquid and read the meniscus with high accuracy.
This can be shown by the following diagram;

Note: Do note that these measurements will take place either in laboratory or on the industrial level; which means it can also have some accuracy and precision measurements because everything measured by a naked eye cannot be theoretically considered correct.
The officials will always consider the theoretical values and calculate the deviation factor for proper measurements.