In metric units the mixing viscosity range is 0.17 ± 0.02 Pa·s. The compaction temperature range is 0.28 ± 0.03 Pa·s.

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Multiple Choice

In metric units the mixing viscosity range is 0.17 ± 0.02 Pa·s. The compaction temperature range is 0.28 ± 0.03 Pa·s.

The key idea is recognizing SI units and what they describe. Pa·s is the unit for dynamic viscosity, not for temperature. The values given—0.17 ± 0.02 and 0.28 ± 0.03 followed by Pa·s—are specifying viscosity ranges for mixing and compaction, not temperatures. In practice, asphalt process targets use viscosity ranges to guide mixing and compaction conditions, with tolerances around those targets. So, despite the odd wording calling one a temperature range, the quantities are clearly viscosities in metric (SI) units, making the statement true.

The key idea is recognizing SI units and what they describe. Pa·s is the unit for dynamic viscosity, not for temperature. The values given—0.17 ± 0.02 and 0.28 ± 0.03 followed by Pa·s—are specifying viscosity ranges for mixing and compaction, not temperatures. In practice, asphalt process targets use viscosity ranges to guide mixing and compaction conditions, with tolerances around those targets. So, despite the odd wording calling one a temperature range, the quantities are clearly viscosities in metric (SI) units, making the statement true.

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