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 Let's see how many of know the end point of clour change of four parameters of water testing. Total Hardness Calcium Hardness Total alkalinity Chloride  All four parameters end point colour change is given in below picture. From left to right  Calcium Hardness Chloride Total Alkalinity Total Hardness Now you have to name the colour write in comment box my dear Environmentalists

 

 Viscosity measurement:  To test the viscosity of liquid using ford cup. Liquid has to filled in ford cup and time is measured when its flow through a standard orifices. All measurement using ford cups is done at room temperature i.e. 25 to 27 degree Celsius.  The following formula is used to convert the time flow in second t, to kinetic viscosity V (cSt) V1 = 0.49 (t − 35.0) V2 = 1.44 (t − 18.0) V3 = 2.31 (t − 6.58) V4 = 3.85 (t − 4.49)                         V5 = 12.1 (t − 2.00) For example:    If you want to determine the viscosity of the oil fist we have to find the time in second.  Want to know how to determine the time click on link. Supposed time is 46 second the put it into given formula for  V1= 0.49(46-35)      = 5.39 cSt Similarly for V2 V2 = 1.44 (46 − 18.0) V2 = 40.32 cSt For V3 = 2.31 (46− 6.58)       = 91.06 cSt For V4 = 3.85 (46 − 4.49) 151.7...