Which of the following is a common type of test for measuring the slump of concrete?

The slump test is a widely recognized method for measuring the workability or consistency of fresh concrete. This test involves filling a conical mold with concrete, then removing the mold to observe how much the concrete "slumps" or settles under its own weight. The distance the concrete drops from the top of the mold to the highest point of the slumped concrete is measured in inches or centimeters. This measurable slump provides crucial information about the water-to-cement ratio and overall handling properties of the concrete mix.

The significance of the slump test lies in its ability to help ensure that the concrete is workable for the intended application, which is vital for various construction processes and to achieve proper compaction and finishing. Since other tests listed—penetration, compressive strength, and tensile strength—serve different purposes in evaluating concrete properties, they do not specifically measure the consistency or workability of fresh concrete like the slump test does.