Question

The percentage void ratio is defined as the ratio of _____

(a) volume of air voids to total volume of the soil mass

(b) volume of air voids to volume of total voids

(c) volume of air voids to volume of water

(d) volume of voids to total volume of the soil mass

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I'm obligated to ask this question of Void Ratio, Porosity and Degree of Saturation in portion Preliminary Definitions and Relationships of Geotechnical Engineering I

Answer 1

Right choice is (a) volume of air voids to total volume of the soil mass

To explain I would say: The percentage void ratio is defined as the ratio of the volume of air voids to the total volume of the soil mass. It is expressed as percentage.                                                                                                                                       na = (Va/v) * 100.