Bolt tensioners are devices designed to apply a specific tension to a bolt. The device may be either removed once the actual nut is threaded into place, or left in place, in the case of a hydraulic nut.
The metric system does away with all of the different units of volume used in the English system, and instead, uses only one unit to measure volume. That unit is called the liter. Materials Needed: Meter stick or metric ruler; stiff cardboard such as poster board; scissors or hobby knife; tape.
Can also be used to measure the volume density of the formula. Topful cup. Officially, the instrument used to measure liquid volume is called a graduated cylinder. A graduated cylinder can, through a method called water displacement, indirectly measure the volume of solids and gases.