Glossary “pour point” Definition:
Lowest temperature at which a fluid will flow freely.
p
pour point depressants
Glossary “pour point depressants” Definition:
Chemical compounds added to engine oil to help the oil flow at colder temperatures.
poured bearings
Glossary “poured bearings” Definition:
Bearings that are formed by first pouring molten babbitt material into the bearing cavity, allowing tit to cool, then boring it to a specific size.
power
Glossary “power” Definition:
1). Measure of work being done. 2). Rate at which work is being done. In mechanics, power is measured as torque times speed and expressed in units such as horsepower or watts. (Power = I x E) expressed in watts.
power balance
Glossary “power balance” Definition:
The power provides by a cylinder relative to the power provided by each of the otther cylinders in the engine.
pounds per square inch, absolute (psia)
Glossary “pounds per square inch, absolute (psia)” Definition:
Measurement of pressure or stress taken from absolute pressure.
pounds per square inch, gauge (psig)
Glossary “pounds per square inch, gauge (psig)” Definition:
Measurement of pressure or stress taken from atmospheric pressure.
pounds-feet
Glossary “pounds-feet” Definition:
Measurement of of torque. One pound (lb) raised on foot (ft) is equal to one pounds-feet (lb-ft).
pounds-inch
Glossary “pounds-inch” Definition:
Measurement of torque; the energy required to raise one pound, one inch.
pounds per square inch (psi)
Glossary “pounds per square inch (psi)” Definition:
Measurement of pressure or stress.
potential energy
Glossary “potential energy” Definition:
Energy of a body or system with respect to the position of the body or the arrangement of the particles of the system.
potentiometer (pot)
Glossary “potentiometer (pot)” Definition:
Three-wire variable resistor that acts as a voltage divider to produce a continuously variable output signal proportional to a mechanical position.
pounds per horsepower
Glossary “pounds per horsepower” Definition:
Weight of the vehicle divided by its horsepower, a measure of the vehicle’s performance.
potential
Glossary “potential” Definition:
The ability to do somthing
potential difference
Glossary “potential difference” Definition:
The voltage difference between two points, calculated algebraically.
Postcombustion Emissions Device
Glossary “Postcombustion Emissions Device” Definition:
A device such as the catalitic converter that controls emissions after the combustion event
pot
Glossary “pot” Definition:
1). A carburetor. 2). Acronym for potentiometer.
pot life
Glossary “pot life” Definition:
The amount of time a painter has to apply a plastic or paint finish to which a catalyst or hardener was added. Six hours is usually the pot life for catalyzed enamels.
Potassium Hydroxide
Glossary “Potassium Hydroxide” Definition:
A solution of the elements potassium, hydrogen, and oxygen that serves as the electrolyte for a type of fuel cell. Chemically KOH.
postpainting operations
Glossary “postpainting operations” Definition:
Things that are done after painting, such as removing masking paper and tape, reinstalling parts, and cleaning the vehicle.