Hardness Tests

Business / Machine Shop / Hardness Tests: Tests to measure the hardness of metals.

Rockwell Hardness Test

Business / Machine Shop / Rockwell Hardness Test: The most common hardness testing method. This procedure uses a minor load to prevent surface irregularities from affecting results. There are nine different Rockwell hardness tests corresponding to co MORE

Projective Tests

Science / Psychiatry / Projective Tests: Psychological diagnostic tests in which the test material is unstructured so that any response will reflect a projection of some aspect of the subjects underlying personality and psychopathology MORE

Permanent Hardness

Science / Chemistry / Permanent Hardness: Water hardness that remains after boiling the water, mainly due to dissolved calcium sulfate. Chlorides also contribute to permanent hardness. MORE

Temperature Tests

Technology / Motors / Temperature Tests: Tests conducted to determine the temperature rise of certain parts of a motor above the ambient temperature, when operating under specific conditions. MORE

Temporary Hardness

Science / Chemistry / Temporary Hardness: The component of total water hardness that can be removed by boiling the water. Ca(HCO3)2 and Mg(HCO3)2_ are responsible for temporary hardness. MORE

Water Hardness

Science / Chemistry / Water Hardness: Hard water is water contaminated with compounds of calcium and magnesium. Dissolved iron, manganese, and strontium compounds can also contribute to the 'total hardness' of the water, which is usually MORE

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