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TM 5-4320-305-24
O
Obstruction - An obstacle.
P
Pivot - A short rod or shaft about which a related part rotates; the act of turning on or as if on a pivot.
Port - A threaded hole through which fluid may pass, or pressure may be measured. Ports on the pump are used to
connect hoses, and to measure pressure.
Prime - The act of introducing a liquid into a pump to increase the pump's ability to overcome negative head pressure.
R
Race - A grooved part of a component, such as a bearing, in which a moving part slides or rolls.
Recommendations - Suggestions for change; advice given usually to make an improvement.
Require - To demand or need.
Respiration - The process of breathing; inhaling and exhaling.
S
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.
T
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-
meters (N•m).
V
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.
Glossary 4
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