Scope - The extent of an activity or concept; the amount of information covered as in a book.
Solvent - A liquid that can dissolve another substance.
Specific gravity - Ratio of the weight of a liquid to the weight of an equal volume of water. Specific gravity of water is 1.
Symptom - The external sign or indication of a condition.
Tiedown - Strap or fastening device used to hold an object in position.
Torque - Force around an axis. It produces a rotary or twisting motion, and is measured in foot-pounds (ft-lb) or newton-
Valve - A device used to control the flow of a fluid.
Vapor - The gaseous form of any substance which is usually a liquid; vapors are present in the air around the substance.
Ventilate - To provide with a source of fresh or uncontaminated air.
Visual - Visible; detected by the unaided eye.
Volute - Housing into which impeller discharges water.