- N
-
- A gear selection indication for Neutral
- Symbol for Nitrogen
- NAAMSA
- Acronym for National Association of Automobile Manufacturers of South Africa
- NACA duct
- This is an air opening which was named after the National Advisory Committee for Aerodynamics. It was the American organization which developed the kinds of designs for low Drag air ducts for jet engines. NACA ducts are used on cars to force air for engine Breathing and cooling, for forcing air through the Radiators, and for providing fresh air for the passenger compartment.
- Nacelle
- A plastic or metal covering. A headlight nacelle on a Motorcycle is the bucket surrounding the Headlight.
- NADA Used Car Guide
- A listing of current car prices, based on age, condition, and optional equipment; published by National Automobile Dealers Association
- NAFTA
- Acronym for North American Free Trade Agreement on http://strategis.ic.gc.ca/SSG/am00635e.html.
- N.A.G.
- A vehicle brand of which models built between 1925 and 1948 (the classical era), with required application, are classic cars.
- NAICS
- Acronym for North American Industrial Classification System. A coding system developed jointly by the United States, Canada, and Mexico to classify businesses and industries according to the type of economic activity in which they are engaged. NAICS replaces the Standard Industrial Classification (SIC) codes.
- Nail hammer
- A hammer designed to hit the head of nails and usually has a claw device which allows for the removal of nails.
- Nameplate
- A metal tag attached to a machine or appliance that contains information such as brand name, serial number, voltage, power ratings under specified conditions, and other manufacturer supplied data.
Also see
- Naphtha
- An artificially produced petroleum or coal tar fraction with a volatility between
Gasoline and Kerosene.
It is colorless and has an approximate boiling range
between 50°C and
204°C. Used primarily as paint
solvent, cleaning fluid, and blendstock in Gasoline
production, to produce motor gasoline by blending with straight-run gasoline.
Also see
- Naphtha-type jet fuel
- A fuel in the heavy naphtha boiling range having an average gravity of 52.8 degrees API, 20 to 90 percent distillation temperatures of 143°C to 243°C, and meeting Military Specification MIL-T-5624L (Grade JP-4). It is used primarily for military turbojet and turboprop aircraft engines because it has a lower freeze point than other aviation fuels and meets engine requirements at high altitudes and speeds. Note: Beginning with January 2004 data, naphtha-type jet fuel is included in Miscellaneous Products.
- Naphthenes
- One of three basic hydrocarbon classifications found naturally in crude oil. Naphthenes are widely used as Petrochemical feedstock.
- Narrow width chain
- A chain used on multi-speed bicycles with a cassette of 8 or more sprockets.
Also see
- NASCAR
- Acronym for National Association for Stock Car Auto Racing or North America Stock Car Auto Racing or
- NAS Drawings and Specifications
- Dimensional and material standards for aircraft fasteners developed by the National Aerospace Standards Committee. All drawings and specifications are prefixed by NAS.
- Nash
-
A vehicle brand of which several models were classic cars
Click image for books on
Nash- 1930 Series 490
- 1931 Series 890
- 1932 Series 990 and 1090
- 1933 Series 1190
- 1934 Series 1290
- 1940 Sakhnoffsky Special Cabriolet
Also see
- National Ambient Air Quality Standards
- (NAAQS) Ambient standards for criteria air pollutants specifically regulated under the CAA. These pollutants include ozone, CO, NO2>, lead, particulate matter, and SOx. Urban areas are required to achieve attainment in regard to ambient concentrations of these criteria pollutants.
- National Automotive Technical Education Foundation
- A consortium of automotive education experts which has established a steering committee to administer the CHAMP certification process at educational institutions.
- National coarse thread
- (NC) A standard for the threads of nuts and bolts in which the number of threads per inch is much fewer
than a fine (NF) nut or bolt. Observe the difference in the number of threads per inch (TPI) of the NF
and NC in the following chart. Also called Unified National Coarse thread (UNC)
WIDTH NF TPI NC TPI #10 32 24 #12 28 24 1/4 28 20 5/16 24 18 3/8 24 16 7/16 20 14 1/2 20 13 9/16 18 12 5/8 18 11 3/4 16 10 7/8 14 9 1 14 8 1-1/8 12 7 1-1/4 12 6 1-3/8 12 6 1-1/2 12 5 1-3/4 n/a 4 2 n/a 4.5 2-1/4 n/a 4.5 2-1/2 n/a 4 2-3/4 n/a 4 3 n/a 4
- National electrical code (NEC)
- A code for the purpose of practical safeguarding of persons and property from the hazards arising from the use of electricity. It is sponsored by the National Fire Protection Institute. It is used to serve as a guide for governmental bodies whose duty is to regulate building codes
- National Electrical Manufacturers Association (NEMA)
- An organization which establishes certain voluntary industry standards relating to electric motors. These standards refer to the operating characteristics, terminology, basic dimension, ratings, and testing
- National Environmental Policy Act
- (NEPA) The National Environmental Policy Act requires federal agencies to integrate environmental values into their decision-making processes by considering the environmental impacts of their proposed actions and reasonable alternatives to those actions.
- National fine thread
- (NF) A standard for the threads of nuts and bolts in which the number of threads
per inch is much greater than a coarse (NC) nut or bolt. Also called
Unified National Fine thread (UNF). Observe the
difference in the number of threads per inch (TPI) of the NF and NC in the
following chart
WIDTH NF TPI NC TPI #10 32 24 #12 28 24 1/4 28 20 5/16 24 18 3/8 24 16 7/16 20 14 1/2 20 13 9/16 18 12 5/8 18 11 3/4 16 10 7/8 14 9 1 14 8 1-1/8 12 7 1-1/4 12 6 1-3/8 12 6 1-1/2 12 5 1-3/4 n/a 4 2 n/a 4.5 2-1/4 n/a 4.5 2-1/2 n/a 4 2-3/4 n/a 4 3 n/a 4
- National Highway Traffic Safety Administration
- (NHTSA) A US regulatory body which determines the regulations for vehicles.
- National Low-Emission Vehicle
- A light-duty passenger car or truck up to 6,000 lb GVWR that meets the National Low-Emission Vehicle Program standards.
- National Low-Emission Vehicle Program
- (NLEV) Still under development, this program creates voluntary requirements which automakers can adopt in lieu of compliance with other vehicle emission control measures. The program applies to the manufacture of new light-duty vehicles and new light-duty trucks up to 6,000 lb GVWR. Vehicle exhaust emission standards have been established for the 13 northeastern states of the Ozone Transport Commission, applicable on and after the 1997 model year. Standards are extended to the rest of the U.S., except California, on and after the 2001 model year. In general, the standards lie between levels established for the federal Tier I Program and the California LEV Program. Automakers can use a manufacturer's effective average standard to meet the non-methane organic gas standard. Vehicles are certified with California test procedures.
- National Petroleum Council
- (NPC) An advisory body of appointed members whose purpose is to advise the Secretary of Energy.
- National Pollutant Discharge Elimination System
- (NPDES) The part of the U.S. federal Clean Water Act, which requires point source discharges to obtain permits.
- National priorities list
- The Environmental Protection Agency's list of the most serious uncontrolled or abandoned hazardous waste sites identified for possible long-term remedial action under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). The list is based primarily on the score a site receives from the Environmental Protection Agency Hazard Ranking System. The Environmental Protection Agency is required to update the National Priorities List at least once a year.
- National Traffic Safety Administration
- (NHTSA) Under the U.S. Department of Transportation, NHTSA is responsible for reducing deaths, injuries and economic losses resulting from motor vehicle crashes. NHTSA investigates safety defects in motor vehicles, sets and enforces fuel economy standards, helps states and local communities reduce the threat of drunk drivers, promotes the use of safety belts, child safety seats and air bags, investigates odometer fraud, establishes and enforces vehicle anti-theft regulations and provides consumer information on motor vehicle safety topics.
- National Transportation Safety Board
- (NTSB) An independent Federal agency charged by Congress with investigating every civil aviation accident in the United States and significant accidents in the other modes of transportation -- railroad, highway, marine and pipeline -- and issuing safety recommendations aimed at preventing future accidents.
- Native gas
- Gas in place at the time that a reservoir was converted to use as an underground storage reservoir in contrast to injected gas volumes.
- NATO towing hook
- Large, robust, four-bolt attachment towing pintle with top-closure and, usually, 360° rotational capability about the longitudinal axis originally specified for NATO 7.5 tonne military vehicles. Suitable for off-road towing.
- Natural convection
-
- Movement of a fluid caused only by temperature differences (density changes).
- Circulation of a gas or liquid due to difference in density resulting from temperature differences.
- Natural frequency
- The frequency at which an object, circuit, or system oscillates or vibrates when set in free vibration. Large heavy objects have low natural frequencies and small light objects have high natural frequencies.
- Natural gas
- (NG) A gaseous mixture of hydrocarbon compounds, the primary one being Methane and occurs naturally in the earth. The Energy Information Administration measures wet natural gas and its two sources of production, Associated-dissolved natural gas and Nonassociated natural gas, and Dry natural gas, which is produced from Wet natural gas. As an alternative, environmentally friendly fuel, it can be stored under pressure in the trunk of a vehicle as Compressed natural gas (CNG).
- Natural Gas Act
- The Natural Gas Act was passed in 1938, giving the Federal Power Commission (now the Federal Energy Regulatory Commission or FERC) jurisdiction over companies engaged in interstate sale or transportation of natural gas. The act instituted federal oversight of rates charged by interstate gas-transmission companies, and also limited certification authority. Nobody was allowed to build an interstate pipeline to deliver gas into a market already served by another gas pipeline without first obtaining a Federal Power Commission certificate. The principle aims of the Natural Gas Act were to: 1) provide a stable financial and regulatory environment for the financing and construction of interstate gas pipelines; and 2) prevent the "naturally monopolistic" pipelines from engaging in undue discrimination and other feared abuses, including those attendant on their control by utility holding companies or major oil and gas producers.
- Natural gas hydrates
- Solid, crystalline, wax-like substances composed of water, methane, and usually a small amount of other gases, with the gases being trapped in the interstices of a water-ice lattice. They form beneath permafrost and on the ocean floor under conditions of moderately high pressure and at temperatures near the freezing point of water.
- Natural gas liquids
- (NGL) Those hydrocarbons in natural gas that are separated from the gas as liquids through the process of absorption, condensation, adsorption, or other methods in gas processing or cycling plants. Generally such liquids consist of Propane and heavier hydrocarbons and are commonly referred to as lease condensate, natural gasoline, and liquefied petroleum gases. Natural gas liquids include natural gas plant liquids (primarily ethane, Propane, Butane, and Isobutane; see Natural Gas Plant Liquids) and lease condensate (primarily pentanes produced from natural gas at lease separators and field facilities; see Lease Condensate).
- Natural Gas Policy Act of 1978
- (NGPA) Signed into law on November 9, 1978, the NGPA is a framework for the regulation of most facets of the natural gas industry. The gas market before 1978 was drastically different than the one currently existing in the United States. The changes in the market since the 1970's have come partially from increasing technology, but also largely from changes in natural gas regulation. The Natural Gas Policy Act was one of the first efforts to deregulate the gas industry. Congress intended to allow the supply, demand, and thus the price of natural gas to be dictated by market forces, rather than regulation. Other deregulation bills include Order 636.
- Natural Gas Vehicle
- (NGV) A natural gas vehicle is a new breed of car, bus or truck that is powered by a natural gas, either in compressed or liquefied form, rather than the traditional gasoline or diesel fuel. These vehicles offer an extremely clean, safe and efficient alternative to traditional transportation. With the passage of the Clean Air Act Amendments and the Energy Policy Act of 1992, these alternative fuel vehicles are expected to proliferate in the later 1990's. Already, major car manufacturers are offering natural gas vehicles, and there are over 700 fueling stations nationwide.
- Natural gasoline
- A term used in the gas processing industry to refer to a mixture of liquid hydrocarbons (mostly pentanes and heavier hydrocarbons) extracted from natural gas. It includes isopentane.
- Natural Gasoline and Isopentane
- A mixture of hydrocarbons, mostly pentanes and heavier, extracted from natural gas, that meets vapor pressure, end-point, and other specifications for natural gasoline set by the Gas Processors Association. Includes isopentane which is a saturated branch-chain hydrocarbon, (C5H12), obtained by fractionation of natural gasoline or isomerization of normal pentane.
- Naturally aspirated engine
- A conventional engine that takes in air at normal pressure, i.e. not turbocharged or supercharged. The opposite is forced-induction engine
- Natural rubber
- (NR) An elastomer produced from latex, a milky sap, obtained from the rubber tree
(Hevea brasiliensis) and other plants. An elastic and porous form of rubber.
Also see
- Natural weathering
- A corrosion test by means of which the corrosion resistance of a material is tested in the open air
- Nautical Mile
- The Knot is the unit of measurement for water speed. It is nearly equivalent to miles per hour for land. It is also used to measure wind speeds over water.
- Naval brass
- A corrosion resistant metal containing 60 per cent copper, 39 1/4 per cent zinc and 3/4 per cent tin.
See
- Naval bronze
- Basic brass with a small addition of tin for added corrosion resistance against salt water. Also called naval brass