What is a hydrometer used for in mechanics?

What is a hydrometer used for in mechanics?

hydrometer, device for measuring some characteristics of a liquid, such as its density (weight per unit volume) or specific gravity (weight per unit volume compared with water).

What is hydrometer and its uses?

A hydrometer is an instrument used to measure the specific gravity (or relative density) of liquids; that is, the ratio of the density of the liquid to the density of water. A hydrometer is usually made of glass and consists of a cylindrical stem and a bulb weighted with mercury or lead shot to make it float upright.

What is hydrometer technique?

A hydrometer analysis is a measurement method used to determine soil particle size in a sample. Hydrometer analysis is specifically for soil particle sizes that are less than approximately 0.75 mm in diameter.

How can a hydrometer be used to measure the density of a liquid?

The liquid to test is poured into a tall container, often a graduated cylinder, and the hydrometer is gently lowered into the liquid until it floats freely. The point at which the surface of the liquid touches the stem of the hydrometer correlates to relative density.

What are the types of hydrometer?

Note that the three main types of hydrometers available on the market are triple scale hydrometers, thermohydrometers, and precision hydrometers. Accuracy, materials used, and additional accessories are also essential factors to consider.

What is unit of hydrometer?

The hydrometer is considered to be an instrument to measure liquid density, marked in units of g/cm3, but corrections for other hydrometer scales can be determined as well.

What is the objective of hydrometer test?

Objective Hydrometer test is carried out to quantitatively determine the Particle/Grain Size Distribution for soil particles of size smaller than 75 micron.

How does the hydrometer test work?

Hydrometer method is used to determine the particle size distribution of fine-grained soils passing 75 µ sieve. The hydrometer measures the specific gravity of the soil suspension at the center of its bulb. The specific gravity depends upon the mass of solids present, which in turn depends upon the particle size.

Why is hydrometer analysis important?

Hydrometer analysis is essential for obtaining the complete particle size distribution of such soils. Particle size distribution obtained from sieve analysis may be combined with the data from a hydrometer analysis to produce a complete gradation curve.

What temperature is a hydrometer?

Most hydrometers are calibrated to 20°C, but some are calibrated to 15°C – any good hydrometer will have the calibration temperature marked. This calculator, when working with a hydrometer calibrated to 20°C, is accurate over the approximate range 0-60°C, and when calibrated to 15°C, approximately 0-55°C.

How do you read a hydrometer?

To read a hydrometer, pour a sample of the liquid you want to test into a clean, transparent container. Lower the hydrometer into the liquid and stir it around gently, but make sure it doesn’t touch the sides of the container. Read the hydrometer scale at the lowest point of the surface of the liquid.

Why is hydrometer test important?

What is Stokes law and hydrometer?

Hydrometer soil analysis is based on Stokes Law, which claims that the velocity at which a particle settles while suspended, all other factors being equal, is determined by the shape, weight and size of the particle.

What is the difference between a hygrometer and a hydrometer?

A hygrometer measures humidity, the amount of water vapour in air. A hydrometer, on the other hand, measures the density or specific gravity (SG) of a liquid by floating in the liquid.

What is humidity ratio?

The humidity ratio or specific humidity is the weight of water vapour per unit weight of dry air (pound per pound or kg/kg). The retention capacity of moisture by air is a function of the temperature: the warmer the air, the more moisture it can hold.