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FED-STD-791 Lubricants, Liquid Fuels, And Related Products, Testing Method OfThis test method standard is composed of standard test methods for sampling, inspecting and testing lubricants, liquid fuels and related products. It is issued pursuant to the Federal Property and Administration Services Act of 1949, as amended and its application to the purchase of commodities referred to herein is mandatory on all Federal agencies.

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'NOTE:This draft dated 15 April 2006' by DasH - Page 248 of 460
FED-STD-791D
7.2 Calculate the percentage change in volume of each rubber sheet as follows:
A- B
* 100
V=
B
where:
V = change in volume, percent.
A = displacement weight at conclusion of test, mg.
B = displacement weight before immersion in sample, mg.
8. REPORTING
8.1 Report the average percent volume change of the three rubber sheets.
9. PRECISION
9.1 Repeatability. Results by one operator using one apparatus must not differ by
more than 1%.
9.2 Reproducibility. Results from different operators or different apparatus must
not differ by more than 2%.
Method prepared by:
Navy - NAPC - 1986
247



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