Question

In a hydrometer test, a dispersing agent is mixed with water to increase its density.

(a) True

(b) False

I had been asked this question at a job interview.

The above asked question is from Grain Size and Shape in division Molding and Core Sands of Casting-Forming-Welding I

Answer 1

Correct answer is (a) True

To explain I would say: For the analysis of small size grains of soil, a hydrometer test is performed in which a dispersing agent is used which blended with water to increase its specific gravity that indicates an increase in density of liquid. It also affects the variation of temperature of the liquid from the hydrometer calibration temperature.