3.  
The point at which pure water changes from a liquid into a gas (boils):
Water boils at 100°C, 212°F, 373°K, and 672°R.

temperature bulb (electrical thermometer component). A temperature-sensing device used with a ratiometer-type thermometer. A length of small-diameter nickel wire is wound around an insulator and enclosed in a thin stainless steel tube. This bulb is surrounded by the medium whose temperature is to be measured so the nickel wire can reach the same temperature as the medium. The resistance of the wire changes with its temperature, and a sensitive resistance-measuring instrument measures the resistance of the wire and displays this resistance in terms of degrees of temperature.
tempered glass. Glass that has been heat-treated to increase its strength. Tempered glass is used in birdproof, heated windshields for high-speed aircraft.
tempering steel (heat treatment). A process in the heat treatment of steel in which some of its hardness and brittleness are removed. The steel is first hardened by heating it to the correct temperature and then quenching it in oil, water, or brine. This makes the steel hard, but also brittle. The hard steel is then reheated, but to a lower temperature, and held at this temperature for a specified period of time. It is then allowed to cool to room temperature in still air. This reheating and cooling is called tempering.
template (layout tool). An outline pattern made of sheet metal, plastic, or heavy paper that can be traced on the material of which a part is to be made. Much time is saved by using a template rather than having to lay out the outline of the part from the engineering drawing each time a part is to be made.

tensile strength. The strength of a material that opposes the stresses which try to stretch or lengthen it.
tensile stress. A stress that tries to pull an object apart.
tensiometer. A precision instrument used to measure the tension on a steel control cable installed in an aircraft. The tensiometer holds the cable at two points, and an anvil presses on the cable between these points and deflects it a specific amount. The amount of force needed to deflect the cable is measured, and this value is used on a chart to determine the tension on this particular type and diameter of cable.
tension adjusters (aircraft control system components). Devices used in the control system of some large aircraft to maintain a constant tension on the control cables as the aircraft dimensions change because of changes in temperature.
The dimensions of the large mass of aluminum of which an airplane is made change a great deal from the time the plane leaves a hot ramp until it reaches the subzero temperatures of high altitude. If tension adjusters were not used, the control cables would become too loose when the metal contracts and the airplane becomes smaller.
tentative calculated landing time. See TCLT.