دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n pi: organic compounds of hydrogen and carbon whose densities, boiling points, and freezing points increase as their molecular weights increase. Although composed of only two elements, hydrocarbons exist in a variety of compounds, because of the strong affinity of die carbon atom for other atoms and for itself. The smallest molecules of hydrocarbons are gaseous;the largest are solids. Petroleum is a mixture of many different hydrocarbons.

n: see hydrogen cyanide. hydrocyclone n: a cone-shaped separator for separating various sizes of particles and liquid by centrifugal force. See desandet;desilter.

the formation of cavities just below the surface in a metal. Growth of the near-surface blisters may result in bulges in the metal.

n: the characteristic that certain material is very difficult to wetting in the water.

n: excessive amount of carbon dioxide in the blood, often resulting from an excessive carbon dioxide partial pressure in a divers breathing supply. Also called carbon dioxide excess.

.. n: a transformer loss caused by magnetism retained in the core of the transformer each time the alternating current is reversed. Some energy must be used to overcome the residual magnetism each time the current reverses.

n: a collection of sediment in a lake at the point at which a river or stream enters. When the flowing water enters the lake, the encounter with still water absorbs most or all of the streams energy, causing its sediment load to be deposited.

n: a pulley or sprocket used with belt or chain drives on machinery to maintain desired tension on the belt or chain.

abbr: immediately dangerous to life and health.

solidified molten rock. Specifically granites, etc.