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What can be said about ASTM D943 TOST tests?

A. Many gas turbine OEMs specify 2000 to 4000 hours.
B. New gas turbine technology specifies 7000 hours.
C. Actual sample volume is depleted at approximately 10,000 hours.
D. All of the above.

Answer :

Final answer:

Option (c), The ASTM D943 TOST tests evaluate the oxidation stability of turbine oils. the sample volume is usually depleted at around 10,000 hours.

Explanation:

The ASTM D943 TOST test, or Turbine Oil Stability Test, is a method used to evaluate the oxidation stability of new and used turbine oils. It measures the time needed for a sample to reach a specified level of breakdown.

The statement that many gas turbine OEMs specify 2000 to 4000 hours, and new gas turbine technology specifies 7000 hours are both accurate, reflecting the varying expectations in different turbine designs.

Lastly, the actual sample volume is typically depleted at approximately 10,000 hours, so all of the above statements about the TOST tests are correct.

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