The physical properties and tests of lubricating oils . 3dS 44£ ZO 366 44-^ a/ 33Q 4S4 -^^^ 376 4/^ ^ ? 3^Z 305 ^^ 397 456 1 19 PHYSICAL PROPERTIES AlTD TESTS OP LUBKICATITG OIL importance in the examination of lubricatingoils. Oils of low flashing point are unsafeto use ordinary tem^oeratares ofoioeration, a heci-ry sediment of sulphuric acidcompound, very gurnmy in nature, is left on thebearings -:lLen the volatile matter is driven deposit destroys the bearings and preventssmoothness of operation. It is, therefore, ofgreat im-oortance to detect the nresence ofsulpho comp
The physical properties and tests of lubricating oils . 3dS 44£ ZO 366 44-^ a/ 33Q 4S4 -^^^ 376 4/^ ^ ? 3^Z 305 ^^ 397 456 1 19 PHYSICAL PROPERTIES AlTD TESTS OP LUBKICATITG OIL importance in the examination of lubricatingoils. Oils of low flashing point are unsafeto use ordinary tem^oeratares ofoioeration, a heci-ry sediment of sulphuric acidcompound, very gurnmy in nature, is left on thebearings -:lLen the volatile matter is driven deposit destroys the bearings and preventssmoothness of operation. It is, therefore, ofgreat im-oortance to detect the nresence ofsulpho compounds the flash Test:- AcGording to t?ie Molecula-r Trieory ofHeat, matter consists of units or parts calledmolecules, which are composed of smaller uritsof the elements, called atoms. The addition ofheat energy to a boay either thekinetic energy of its molecules or increasestheir potential energy. The imnortant changesin substances, produced by heat, are changes in. Heat Tejst AiDiJaratus 20 PHYSICiAL PROPEMIES Ai:i> TESTS Oi LUBRICATIICG OIL arrangement of molecules ^ith respect to , and changes in state. When an oil is heated, the -moleculesare ,nged and evaporation takes the oil is poor, the lighter inolecules willrise, leaving a deposit of black, in the bottom of the vessel. Thisproves the preserce of sulphuric or sulphcnicacid compounds, showing that the oil v;as notproperly neutrali^.ed in the refining the oil is good, it ••ill in colorbut : perfectly clear and vrithout sedi-ment, even after standing twenty-four hours .This test is ing and so important, thatit is to oil nurchasers as afeature to be incorporated in their In order to perform a heat test, fillan Ehrlemeyer flask about half full v/ith theoil to oe tested, Keat it up slowly over an HEAT TEs3T TURN^ DARKER-NO PEDIMENT. TURNS DARKER-NO SEDIMENT TURNS DEEP/^ED
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Keywords: ., bookcentury1900, bookdecade1910, bookidphysicalprop, bookyear1917
