The motor oil in a car's engine will accumulate dirt over time, and it is recommended that the oil in a car's

motor be changed regularly. Car mechanics use an instrument called a hydrometer to determine if the oil

needs to be changed. Explain the steps in using a hydrometer and how a hydrometer uses specific gravity to

test the motor oil for dirt.

BI y

(600)

Explanation:

A hydrometer is an instrument that is mainly used to measure the specific gravity. It works on the Archimedes principle

It measures the relative density liquid that is ratio of density of liquid to that of water.

To perform the test, the car mechanic would take the oil in some graduated cylinder and then hydrometer is lowered into the oil till it floats freely. The point at which the oil touches the stem of the hydrometer is noted. Now oils specific gravity would be more incase of more dirt and this is the benchmark of oil replacement

It measures the relative density of that

the answer to this question is false