PFD

Personal Flotation Device

Category:Abbreviations

PFD Manufacturers Association

Category:Abbreviations

PFT

Per Freight Ton

Category:Abbreviations

PG

Persian Gulf (See AG)

Category:Abbreviations

PGE

Permanent Group of Experts (in agreement on subsidies and countervailing measures).

Category:Abbreviations

PH

A measure of the acidity or alkalinity of a solution; The negative logarithm of the hydrogen-ion activity; it denotes the degree of acidity or basicity of a solution. At 25

pH

Measure of alkalinity or acidity in water and water containing fluids. Can be used to determine the corrosion inhibiting characteristic in water based fluids. Typically, pH > 8.0 is required to inhibit corrosion of iron and ferrous alloys in water based f ...

Category:Sea Words

Alternating current is carried by conductors and a ground to residential, commercial, or industrial consumers. The waveform of the phase power appears as a single continuous sine wave at the system frequency whose amplitude is the rated voltage of the pow ...

Category:Energy Terms

The process of changing from one physical state (solid, liquid, or gas) to another, with a necessary or coincidental input or release of energy.

Category:Energy Terms

A material that can be used to store thermal energy as latent heat. Various types of materials have been and are being investigated such as inorganic salts, eutectic compounds, and parrafins, for a variety of applications, including solar energy storage ( ...

Category:Energy Terms

A plastic molding component formed by the reaction of phenol and formaldehyde. It can be heavily reinforced or "filled" with glass fibers or other materials. Phenolics are known for their high impact strength, excellent wear characteristics, and dimension ...

Category:Meteorology

PHL

Philippines (Flag)

Category:Abbreviations

PHL

Philippines (flag).

Category:Abbreviations

Alphabet used by the Navy when making sure that a letter is understood; i.e. "BRAVO OSCAR ALPHA TANGO spells BOAT"

Category:Sea Words

Forming an adherent phosphate coating on a metal by immersion in a suitable aqueous phosphate solution. Also called phosphatizing. See also conversion coating.

A photometric unit of illuminance or illumination equal to one lumen per square centimeter.

Category:Meteorology

A hydrogen production process that process uses algae. Under certain conditions, the pigments in certain types of algae absorb solar energy. An enzyme in the cell acts as a catalyst to split water molecules. Some of the bacteria produces hydrogen after th ...

Category:Energy Terms

An electric current induced by radiant energy.

Category:Energy Terms

A device for measuring light intensity that works by converting light falling on, or reach it, to electricity, and then measuring the current; used in photometers.

Category:Energy Terms

A transducer which converts electromagnetic radiation in the infrared, visible, and ultraviolet regions into electrical quantities such as voltage, current, or resistance. Also called photo cell.

Category:Meteorology