Correct Answer - Option 1 : Its high density
Explanation:
The liquid used in manometers should have high density so that the height of the column can be reduced.
Because the manometers are used for high-pressure measurement, so it is important to make the column height in a practical limit.
Most of the case, for gauge pressure measurements, Mercury is widely used as manometric fluid because
- It has non-evaporating quality under normal conditions, sharp meniscus and stable density.
- It is generally used in manometers for measuring all pressures except the smallest ones.
- For some pressure differences and low-level vacuum, water can be considered as a working fluid in the manometer.
- A manometer is one of the most accurate devices for measuring pressure in the lower ranges.
- Since manometers are so accurate, they are often used as calibration standards.
