Glossary “non hardening” Definition:
A gasket sealer that never hardens.
n
nominal rating
Glossary “nominal rating” Definition:
Lowest rating of a system or device.
nominal shim
Glossary “nominal shim” Definition:
A shim with a designated thickness.
nominal size
Glossary “nominal size” Definition:
Designation used for general identification, such as the inside diameter of a tube.
noise
Glossary “noise” Definition:
1). Any unwanted voltage or current in an electrical circuit. 2). An unpleasant sound found to be abnormal to the vehicle’s operating characteristics.
Nomax
Glossary “Nomax” Definition:
Trade name for a fabric that is used in race drivers’ apparel.
no load test
Glossary “no load test” Definition:
A starting motor test to determine the rpm and current draw of a starter motor. The mechanical tachometer is placed on the drive end of the armature shaft and the motor is then connected to a proper power source. An ammeter is attached to the circuit to determine current requirements.
NO2
Glossary “NO2” Definition:
Nitrogen Dioxide
noble metals
Glossary “noble metals” Definition:
A rare and expensive group of metals that resist corrosion such as gold (Au), iridium (Ir), platinum (Pt), palladium (Pd), ruthenium (Ru), and rhodium (Rh), some of which may be found in catalytic converters.
nodular cast iron
Glossary “nodular cast iron” Definition:
Cast iron used to make engine blocks that is treated, while molten, with an alloy that causes the formation of the graphite in very small lumps.
noid light
Glossary “noid light” Definition:
Used to test solenoids like fuel injectors.
no good (NG)
Glossary “no good (NG)” Definition:
Not fit for service.
Nm
Glossary “Nm” Definition:
Newton meter
NO
Glossary “NO” Definition:
Normally Open
Nitrous Oxide Systems (NOS)
Glossary “Nitrous Oxide Systems (NOS)” Definition:
Popular manufacturer of nitrous oxide injection systems.
NLGI
Glossary “NLGI” Definition:
National Lubricating Grease Institute. Usually associated with grease. The higher the NLGI number, the firmer the grease; #000 is very fluid whereas # 5 is very firm. The consistency most recommended is NLGI #2 (soft)
NLV
Glossary “NLV” Definition:
Non Linear Valve
nitro
Glossary “nitro” Definition:
Term used for nitromethane.
nitrogen
Glossary “nitrogen” Definition:
A colorless, odorless, tasteless gas that makes up 78% of the atmosphere and is part of all living tissues.
nitrogen oxide
Glossary “nitrogen oxide” Definition:
Any chemical compound of nitrogen and oxygen (NOx) as a by-product of combustion that forms smog in the presence of sunlight.