Automotive Glossary


Automotive words, phrases and abbreviations.

Browse the glossary using this index

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N

Non-Return Valve

A valve that will allow fluid or gas to pass in one direction only.

Non-Verbal

Any form of communication that does not use words, i.e. traffic lights, shaking somebody's hand and smiling.

Normally Aspirated

Non pressure-charged engine using atmospheric pressure and cylinder vacuum to charge the cylinders.

North Pole

The term used to describe one of the poles of a magnet where the magnetic field lines of force start.

NOx

Oxides of nitrogen. An exhaust emission pollutant.

Nozzle

The tip of an injector from where the fuel is sprayed.

NT

Nominated Tester – a person nominated by an AE to carry out tests, Inspectors appointed by Designated Councils to carry out tests, all of which are approved by VOSA. Also VOSA staff appointed under section 66A of the Road Traffic Act 1988.


NTC Resistor

Type of resistor that has resistance reducing with increases in temperature. Used for temperature sensors.

Nucleus

The mass of neutrons and protons at the centre of an atom.

NVRAM

Non-volatile Random Access Memory


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