DICTIONARY OF AUTOMOTIVE TERMS - "Ph"


PH:
Measurement of the free hydrogen ion concentration in an aqueous solution. A pH of 7 is neutral.
See pH value
Phaeton:
An open-type body with two cross seats, it usually accommodates five passengers. A folding windshield, folding weatherproof fabric top and removable side curtains are usually standard equipment. The four-seater was called a double phaeton, and the six-seater or seven-seater was called a triple phaeton. Also see sport and Imperial phaeton.

Phase:
  1. Distinct functional operation during a cycle.
  2. The space relationship of windings and changing values of the recurring cycles of AC
Phase displacement:
The mechanical and electrical angle by which phases in a polyphase motor or main and capacitor (or starting) windings in an induction motor are displaced from one another
Phase-locked loop circuitry:
See PLL circuitry
Phase loss monitor:
Motor protection device for polyphase motors that measures current flow to detect phase loss.
Phase pressure forming:
See solid phase pressure forming
Phenolic:
A wheel cylinder or caliper piston made of platic (phenolic) material rather than metal.
Phenolic spacer:
A carburetor base gasket made from a thermosetting resin used specifically for heat insulation between the carburetor and the intake manifold
Phial:
Term sometimes used to denote the sensing element on a thermostatic expansion valve.
Phillips head screw:
A screw having a fairly deep cross slot instead of the single slot as used in conventional screws.
Phillips screw:
A common type of cross-head screw
Phillips screwdriver:
A screwdriver with a pointed tip that is shaped to fit the crossed slots in the heads of Phillips screws.
Phone:
See:
car phone
cell phone
cellular phone
mobile phone
Phosphate:
See manganese phosphate coating
Phosphate coating:
A special conversion coating produced by phosphating. It is applied to camshafts which promotes oil retention.
Also See:
manganese phosphate coating
zinc phosphate coating
Phosphate section:
A section in a painting line in which phosphate treatment is performed

Phosphate treatment:
A treatment of metals with a phosphating solution to produce a phosphate conversion coating on the surface
Phosphating:
See:
heavy phosphating
low temperature phosphating
phosphate treatment
Phosphating solution:
A solution of phosphoric acid, often enriched with zinc, used during the bodywork production process for cleaning and rust prevention
Phosphor-bronze:
Bearing material composed of tin, lead, and copper.
Photochemical:
Relates to branch of chemistry where radiant energy (sunlight) produces various chemical changes.
Photodiode:
A light-emitting or light-sensitive diode commonly used in sensing or switching circuits.
Photoelectricity:
Physical action wherein an electrical flow is generated by light waves.
Photon:
Particle of electromagnetic energy found in solar radiation.
Photostatically:
Method by which the molecular formation of an element changes due to light.

Photovoltaic cell:
See solar cell
PH value:
A measure of the concentration of hydrogen ions in a solution, which shows the strength of acid or alkaline. The pH value of an aqueous solution is a number describing its acidity or alkalinity. The pH of a neutral solution is 7.0 at 25°C



Sign My Guestbook Get your own FREE Guestbook from htmlGEAR View My Guestbook


Valid HTML 4.01 Transitional