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It becomes easier to read the bottom part of the meniscus when the hydrometer is in a soil suspension.

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in Casting-Forming-Welding I by (687k points)
It becomes easier to read the bottom part of the meniscus when the hydrometer is in a soil suspension.

(a) True

(b) False

The question was posed to me in final exam.

The question is from Grain Size and Shape topic in chapter Molding and Core Sands of Casting-Forming-Welding I

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The correct choice is (b) False

For explanation: It is impossible to read the bottom part of the meniscus when the hydrometer is in a soil suspension. In the hydrometer test, it is very necessary or essential to form a graph or table that gives a composite correction as a function of temperature for the present of dispersing agent in the hydrometer.

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