Glossary “resistance” Definition:
1). Opposition to the flow of electricity. 2). Opposition to movement, such as wind against a vehicle.
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resistance welding
Glossary “resistance welding” Definition:
1). Term used for spot welding. 2). Welding process that unites the surfaces with heat, obtained from the resistance of the work pieces, and the application of pressure.
residue
Glossary “residue” Definition:
Elements or combinations of elements that remain at the conclusion of a chemical reaction.
resilience
Glossary “resilience” Definition:
Tendency of a material to return to its original shape or form after being bent, compressed or deformed.
resin
Glossary “resin” Definition:
Molten plastic part of fiberglass-reinforced plastic.
residual magnetism
Glossary “residual magnetism” Definition:
Magnetism that remains in an electromagnetic material after the current is interrupted.
residual pressure
Glossary “residual pressure” Definition:
Pressure that is retained in a specific area.
residual pressure check valve
Glossary “residual pressure check valve” Definition:
Check valve used in the outlet port for drum brakes in some master cylinders. The valve retains a slight pressure in the lines to the drum brakes when the brakes are not applied to prevent air from being drawn into the wheel cylinder when the cylinder is returned to it’s at rest position..
residual stress
Glossary “residual stress” Definition:
Stress present in a joint member or material that is free of external forces or thermal gradients.
reserve capacity
Glossary “reserve capacity” Definition:
Term used for reserve capacity rating.
reserve capacity rating
Glossary “reserve capacity rating” Definition:
Number of minutes a fully charged battery at 80¡ãF (26.7¡ãC) can supply power at 25 amperes to run the ignition, lights, and accessories after a charging system failure or when the engine is not running, before dropping to 9.6 volts.
reservoir
Glossary “reservoir” Definition:
Storage tank for a liquid, gas or a vacuum
research octane number (RON)
Glossary “research octane number (RON)” Definition:
Term used for octane number.
repulsion
Glossary “repulsion” Definition:
A mechanical force that tends to separate like magnetic poles or electrical charges.
required sidewall information
Glossary “required sidewall information” Definition:
Information required by the DOT to be included on each tire such as size, load rating, maximum inflation pressure, generic name of materials used in construction, actual number of plys, and so on.
required voltage
Glossary “required voltage” Definition:
1). The low voltage required by a device or system. 2). The highest voltage required to fire a spark plug.
research and development (R&D)
Glossary “research and development (R&D)” Definition:
As the term implies, to research and develop a concept, system, or product.
repaired
Glossary “repaired” Definition:
Reconstituted or reworked to correct a specific and immediate problem, but not necessarily capable of delivering new part performance or life. (not synonymous with remanufactured, overhauled, or rebuilt.
replacement springs
Glossary “replacement springs” Definition:
New springs having the same characteristics, shape, and type of ends as the springs in the vehicle, all four of which should be replaced at the same time.
replacement tire
Glossary “replacement tire” Definition:
Tire purchased to replace an original tire that was supplied by the vehicle manufacturer, having the same size and temperature range as the original tire.