The Slump test of concrete is a method of determining the workability of concrete that is widely used on construction sites across the world. The concrete Slump test is an on-the-spot test that determines, indirectly, the right W/C ratio required for concrete to be utilized for various sorts of work. This test is done by using some simple tools and techniques and can be performed in just a few minutes. There are two parts to the Slump test: the initial or dry part and the wet part. In the initial or dry part of the test, a piece of wire about 1/4 inch in diameter is placed in the center of the concrete surface. If the wire sinks into the concrete more than 2 inches, the concrete needs more water; if it sinks less than 2 inches, the concrete needs less water. In the wet part of the test, the piece of wire is re-tested to see how far it has sunk. A number that is equal to or less than 0.75 indicates that enough water was added during mixing for the job. Above 0.75, too much water was added; below 0.75, not enough water was added. Wire gauges used for the Slump test should be labeled with their actual diameter so there will be no mistake as to what size wire is being used.