Which unit is commonly used to express viscosity in the Saybolt Universal system?

Which unit is commonly used to express viscosity in the Saybolt Universal system?

• A. Sae
• B. Soa
• C. Sa
• D. Sus

Answer: (D)

In the Saybolt system, viscosity is expressed as a time measurement. A fluid’s viscosity is determined by how long it takes to flow a fixed amount through a calibrated capillary at a specified temperature. That time is recorded in seconds and given the unit Saybolt Universal Seconds. The standard abbreviation is SUS (often written as Sus). So the correct unit reflects that you’re linking flow time to the Saybolt Universal test method. The other strings aren’t used as units in this system.

In the Saybolt system, viscosity is expressed as a time measurement. A fluid’s viscosity is determined by how long it takes to flow a fixed amount through a calibrated capillary at a specified temperature. That time is recorded in seconds and given the unit Saybolt Universal Seconds. The standard abbreviation is SUS (often written as Sus). So the correct unit reflects that you’re linking flow time to the Saybolt Universal test method. The other strings aren’t used as units in this system.