Sentence examples for hardness classification from inspiring English sources

Table 3 Water hardness classification Hardness classification USA hardness (ppm) Soft water 0 60 less thana Medium hard water 60 120 less thana Hard water 120 180 less thana Very hard water 180 or morea aWorld Health Organization (2011).

The introduction of a simple 3-scales wood hardness classification returned unconvincing results (Figure 3), as inexperienced monitors were not able to distinguish between hardwood classes while experienced monitors were able to distinguish very light wood only.

The introduction of a simple 3-scales wood hardness classification returned unconvincing results, as inexperienced monitors were not able to distinguish between hardwood classes while experienced monitors were able to distinguish very light wood only.

The same method was used for grain hardness measurement and classification in 171 triticale lines [ 14].

Water was classified in Table 3 based on total hardness according to the classification of Sawyer and McCarty (1967).

A classification of hardness degree is given in terms of its CaCO3equivalent concentration (Table 4), and accordingly, the Seybouse water belongs to soft and medium category (Sawyer and Mc Carty 1978).

To test whether such information could be used to refine tree biomass estimates, each monitor was asked to assess wood hardness using a simple classification: "1" for very light wood, "2" for floater (light wood) and "3" for sinker (heavy wood).

Table 5 Classification of water hardness (Sawyer and Mc Carty 1967) Water classification Hardness range (mg/l of CaCO3) Soft 0 75 Moderate 75 150 Hard 150 300 Very hard >300.

You are not hard for hardness's sake.

Durfor and Becker (1964) developed the following classification for water hardness: soft water, 0 60 mg l−1; moderately hard water, 61 120 mg l−1; hard water, 121 180 mg l−1; and very hard water, over 180 mg l−1.

Based on Sawyer and McCarthy (1967) classification for total hardness, 20% fall under "soft class", 40% under "Hard class", 30% under "moderate hard" class while the remaining 10% falls under "very hard" class during dry season.