Sir Elton Hercules John CBE (born Reginald Kenneth Dwight on 25 March 1947) is a multiple Grammy and Academy Award-winning English pop/rock singer, composer and pianist. Source(s): http://en.wikipedia.org/wiki/Elton_John
The âPerc Testâ. A Perc Test (also known as âPerk Testâ, and more formally known as a Percolation Test), is a soil evaluation that tests the rate at which water drains through soil.
contents form a smooth curve, called the compaction curve, which is used to obtain the optimum. water content and maximum dry density. The two standardized tests in use today, the standard. and modified Proctor tests, differ only by the amount of compactive energy. In practice, the. standard or modified Proctor test is conducted on a soil and specifications are written stating: 1) that the soil moisture content during compaction should be within a specified percent of the. optimum water content; and 2) that the dry density of the compacted soil should be 90 to 100.