Measurement of the ability of an automotive gasoline to resist detonation or pinging in spark-ignited engines.

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A system for weight measurement in which the load is detected by a nozzle and balanced by modulating the air pressure in an opposing capsule.


Laboratory device used to predict the performance of a plastic material by measurement of temperature, viscosity, and shear-rate relationships. Also known as plastigraph.


Liquid-flow measurement device in which a pair of concentric venturi elements replaces the pitot-tube probe.


A device for the measurement of viscosity by the timed fall of a piston through the liquid being tested.


Abbreviated pt. 1. A unit of volume, used in the United States for measurement of liquid substances, equal to 1/8 U.S. gallon, or 231/8 cubic inches, or 4.73176473 10 4 cubic meter. Also known as liquid pint (liq pt). 2. A unit of volume used in the United States for measurement of solid substances, equal to 1/64 U.S. bushel, or 107,521/3200 cubic inches, or approximately 5.50610 10 4 cubic meter. Also known as dry pint (dry pt). 3. A unit of volume, used in the United Kingdom for measurement of liquid and solid substances, although usually the former, equal to 1/8 imperial gallon, or 5.6826125 10 4 cubic meter. Also known as imperial pint.


Device for measurement of solution turbidity by use of photocells to detect the loss of intensity of light beamed through the solution.


A ninstrument for the measurement of electrical phase angles. Also known as phase-angle meter.


A technique in work measurement used to determine the leveling factor to be applied to an operator or a group of operators by short, randomly spaced observations of the performance index.


1. An instrument that measures the penetrating power of a beam of xrays or other penetrating radiation. 2. An instrument used to determine the consistency of a material by measurement of the depth to which a standard needle penetrates into it under standard conditions.


A measurement of profitability or liquidity of an investment, being the time required to recover the original investment in depreciable facilities from profit and depreciation; usually, but not always, calculated after income taxes.

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