The Saybolt viscometer measures the time required for 60 milliliters of the tested fluid at 100 degrees to pass through a standard orifice. What is the volume and temperature used in this test?

The Saybolt viscometer measures the time required for 60 milliliters of the tested fluid at 100 degrees to pass through a standard orifice. What is the volume and temperature used in this test?

• A. 60 milliliters at 100 degrees
• B. 50 milliliters at 25 degrees
• C. 100 milliliters at 120 degrees
• D. 30 milliliters at 75 degrees

Answer: (A)

The key idea here is that the Saybolt viscometer uses fixed test conditions: a specific volume of fluid and a specific temperature. The flow time is measured for 60 milliliters of the tested fluid as it passes through a standardized orifice, at a controlled temperature. Those fixed values—60 milliliters and 100 degrees—define the test setup, so the result is comparable across samples and tests. That’s why the correct description is 60 milliliters at 100 degrees. Other options propose different volumes or temperatures, which would change the flow time and aren’t the standardized test conditions.

The key idea here is that the Saybolt viscometer uses fixed test conditions: a specific volume of fluid and a specific temperature. The flow time is measured for 60 milliliters of the tested fluid as it passes through a standardized orifice, at a controlled temperature. Those fixed values—60 milliliters and 100 degrees—define the test setup, so the result is comparable across samples and tests.

That’s why the correct description is 60 milliliters at 100 degrees. Other options propose different volumes or temperatures, which would change the flow time and aren’t the standardized test conditions.