Pressure Altimeter: An aneroid barometer calibrated to indicate altitude in feet instead of units of pressure. It is read accurately only in a standard atmosphere and when the correct altimeter setting is used.

 

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Pressure Altimeter: An aneroid barometer calibrated to indicate altitude in feet instead of units of pressure. It is read accurately only in a standard atmosphere and when the correct altimeter setting is used.

Pressure Altitude: The altitude in standard atmosphere at which a given pressure will be observed. It is the indicated altitude of a pressure altimeter at an altitude setting of 29.92 inches of mercury, and is . . . View Full Definition

Pressure Transducer: Outputs electrical signal proportional to pressure.

Pressure-Treated Wood: Lumber that has been saturated with a preservative.

Pressureless Ball: A special type of tennis ball that does not have a core of pressurized air as standard balls do but rather has a core made of solid rubber, or a core filled tightly with micro-particles. Qua . . . View Full Definition

Pressure Tendency: The pressure characteristic and amount of pressure change during a specified time period, usually the three hour period preceding the observation.

Pressured Speech: Speech that is increased in amount, accelerated, and difficult or impossible to interrupt. Usually it is also loud and emphatic. Frequently the person talks without any social stimulation an . . . View Full Definition

Pressure Relief Valve (PRV): A device mounted on a hot water heater or boiler which is designed to release any high steam pressure in the tank to prevent tank explosions.

Pressure Jump: A sudden increase in the observed atmospheric pressure or station pressure.

Pressure Port: A threaded orifice which can be fitted with a pressure gauge or pressure transducer for determining the pressures within a motor while in operation.