Automotive Glossary
Automotive Glossary
Browse the glossary using this index
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Viscosity cupA precision device used to measure the viscosity of a liquid by timing how long it takes the liquid to drain out of the cup in a continuous stream. The standard Viscosity cup in use in the UK paint industry is known as a BS B4 or DIN 4 cup, which has a 4mm orifice for the paint to flow through. | |
Viscosity IndexA measure of the change in the flow rate (viscosity) of a liquid with temperature rise. The higher the viscosity index the smaller is the change in viscosity. | |
Viscous CouplingA drive coupling that uses a fluid to transmit drive. Also sometimes a fluid coupling. | |
VOC ContentThe measure of volatile organic compounds (VOC's) in solvent-borne paints. Usually measured as the weight in kilos of non-exempt solvent per tonne of paint. | |
VolatileReadily changes to vapour or gas at ambient temperatures. | |
VolatilityThe tendency of a liquid to evaporate. Liquids with high boiling points have low volatility and vice-versa. Volatility affects flash-off time and fire hazard consideration. | |
VoltageElectromotive force expressed in volts. Potential difference. | |
Voltage DropThe voltage that is lost when an electrical current passes through a resistance. | |
Voltage RegulatorAn electrical or electronic device to maintain a generator output within a narrow voltage range. | |