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A measure of the amplitude of vibration of a piezoelectric crystal plate under specified conditions.

Related Terms

DIELECTRIC STRENGTH

A measure of the ability of an insulating material to withstand electric stress (voltage) without failure. Fluids with high dielectric strength (usually expressed in volts or kilovolts) are good electrical insulators. (ASTM Designation D 877.)

COPPER STRIP CORROSION

A qualitative measure of the tendency of a petroleum product to corrode pure copper.

SALINITY

A measure of the concentration of dissolved mineral substances in water.

ASH

A measure of the amount of inorganic material in lubricating oil. Determined by burning the oil and weighing the residue. Results expressed as percent by weight.

FRETTING

Wear phenomena taking place between two surfaces having oscillatory relative motion of small amplitude.

SHELL PLATING

The plates forming the outer side and bottom skin of the hull

ASPIRATING PSYCHROMETER

A device which draws sample of air through it to measure humidity.

STEALER

A single wide plate that is butt-connected to two narrow plates, usually near the ends of a ship.

POISE

A measure of viscosity (absolute viscosity) numerically equal to the force required to move a plane surface of one square centimeter per second when the surfaces are separated by a layer of fluid one centimeter in thickness. It is the ratio of the shearing stress to the shear rate of a fluid and is expressed in dyne seconds per square centimeter (DYNE SEC/CM2); 1 centipoise equals .01 poise.

NEUTRALIZATION NUMBER

A measure of the total acidity or basicity of an oil; this includes organic or inorganic acids or bases or a combination thereof (ASTM DesignationD974-58T) .
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