- g
- A unit of measurement for Lateral acceleration, or road-holding. One g is equivalent to 981 cm (32.2 feet) per second every second, the rate at which any object accelerates when dropped at sea level. If a car were cornering at 1.0 g -- a figure that very few production cars are able to approach -- the driver's body would be pushing equally hard against the side of the seat as against the bottom of it. Most fast sedans accelerate about 0.8 g.
- G7
- Seven industrial countries consisting of the United States, Japan, Germany, France, the United Kingdom, Italy and Canada, whose leaders have met at annual economic summits since 1975 to coordinate economic policies.
- Gage
- A standard SAE designation of wire sizes, expressed in AWG (American Wire Gage). The larger the gage number, the smaller the wire. Metric wire sizes are expressed in cross-sectional area, which is expressed in square millimeters. Sometimes the spelling gauge is also used to designate wire size. However, it is becoming standard to use gage for wire size and gauge for instruments. Americans often use gage for instruments.
- Gal.
- Abbreviation for gallon. A US gallon (3.78543 liters) (231 cubic inches) is 20% smaller than an Imperial gallon (4.54609 liters).
- GALFAN®
- A trademark for a special type of hot-dip galvanized steel sheet with a coating consisting of a zinc alloy containing 5% aluminum and rare earths
- Gallery
- A Channel or tube usually found within the engine
block for the transfer of fluid or gas.
Also see
- Galling
- A condition that takes place when two metals or fasteners stick together and cannot be easily loosened. In tightening fasteners, for example, pressure builds on threads as metals rub against each other, and the passive film preventing corrosion on stainless may not form due to lack of oxygen. Also called Seizing
- Gallon
- A US gallon (3.785 liters) is 20% smaller than an Imperial gallon (4.546 liters).
- Galvalume®
- Trademark for a special type of hot-dip galvanized steel sheet with a coating consisting of 55% aluminum, 43.4% zinc and 1.6% silicon
- Galvanic action
- Wasting away of two unlike metals due to electrical current passing between them. The action is increased in the presence of moisture.
- Galvanic cell
- Cell which converts chemical energy into electrical energy by irreversible chemical reactions
- Galvanic corrosion
-
- Corrosion due to the action of a galvanic cell.
- An accelerated degree of corrosion occurring when two different metals are in contact with moisture, particularly sea water. All metals have what is termed a specific electric potential, so that low level electric current flows from one metal to another. A metal with a higher position in the galvanic series will corrode sacrificially rather than one with a lower position, meaning stainless, for example, will corrode before gold. The further apart the metals on the chart, the more electric current will flow and the more corrosion will occur. No serious galvanic action will occur by combining the same metals, only dissimilar ones. To prevent galvanic corrosion, use insulation, paint, or coatings when separating dissimilar metals; or put the metal to be protected next to a metal which is not important in the assembly, so it can corrode sacrificially. Metals listed first will corrode due to galvanic reaction before those at end of paragraph: magnesium, zinc, aluminum 1100, cadmium, aluminum 2024, steel and iron, lead, tin brass, copper, bronze, monel, 304 and 316 stainless (passive), silver, titanium, graphite, gold.
Also see
- Galvanize
- The action of plating with zinc and/or lead by hot dipping or
Electrodeposition to protect from rust.
Also see
- Galvanize differentially
- The action of obtaining different coating thicknesses on the two sides of the sheet of iron.
- Galvanizing
- The application of zinc coatings on the surface of a metal, by hot dipping or Electrodeposition.
- Galvanizing bath
- A bath for hot-dip galvanizing or Electrogalvanizing
- Galvanometer
- An instrument used to measure the pressure, amount of, and direction of an
electric Current.
Also see
- Gamma layer
- Part of the zinc-iron alloy layer on hot-dip galvanized iron and steel containing 21-28% iron
- Gangway
- A narrow hanging staircase used by persons entering or leaving a vessel from the pier or boat
- Gantry
-
Gantry
- A structure with an overhead beam, used for lifting out an engine. Compare Engine hoist.
- Overhead steel structures across the highway to hold up a traffic sign
- Gap
-
- The distance between the center terminal
(Electrode) and the outer terminal
(Electrode) through which the
Spark must travel in a
Spark plug.
Also see
- The distance between the points in contact
Breaker points.
Also see
- The distance between two vehicles traveling down the road as they go in the same direction. Generally a safe distance is a minimum of two seconds behind the vehicle in front.
- The distance between the two ends of Piston rings.
- The distance between the center terminal
(Electrode) and the outer terminal
(Electrode) through which the
Spark must travel in a
Spark plug.
- Gap bridging
- A formation of carbon or other deposits across the Spark plug gap which shorts out the plug
- Gap insurance
- This covers you against additional losses not covered by your auto insurance in the case of an accident in which the vehicle is totaled. Most auto insurance will cover the actual cash value of the vehicle and what is owed on the lease contract, including early termination fees. Gap insurance is most important in the early years of a lease when the difference between the value of the car and what is owed are greatest. Some manufacturers now include Gap insurance in their leases.
- Gapping
- Adjusting the distance between the Electrodes of
a Spark plug or the points of contact
Breaker points.
Also see
- Garage
-
- A building in which a motor vehicle is kept.
- The premises on which motor vehicles are repaired or serviced and/or where fuel is sold.
- To keep in a garage
- Garaged
- A reference to a vehicle which is kept in a garage, as in My car is always garaged. The abbreviation in advertisements is gar'd.
- Garbage
- Trucker slang for produce (bananas, lettuce etc.) as in "I sure am glad I'm not takin' this load of garbage to Hunt's Point."
- Garbage truck
- A cargo body style often with hydraulic packing mechanisms or hydraulic arms for lifting dumpsters. Included are roll-offs, vehicles used for transporting refuse containers. Roll-offs have rails or a flat bed and a hoist for loading and unloading the refuse container. Also called refuse truck
- Garbage wagon
- A scornful term used by some outlaw bikers to describe a Touring motorcycle
- Garnish molding
- The upper molding on a door panel used to retain the door trim panel to the door assembly
Also see
- Gas
-
- A vapor having no particles or droplets of liquid. In physics, a gas is a substance which possesses perfect molecular mobility and, unlike a liquid or a solid, the ability to expand indefinitely
- A non-solid material. It can be compressed. When heated, it will expand; and
when cooled, it will contract (such as air.)
Also see
- A common term for Gasoline. The British term
is petrol.
Also see
- A term for LPG or Propane.
- A term referring to the Exhaust gases.
- A non-solid, non-liquid combustible energy source that includes natural gas, coke-oven gas, blast-furnace gas, and refinery gas.
- Fuel gas, such as natural gas, undiluted liquefied petroleum gases (vapor phase only), liquefied petroleum gas-air mixtures, or mixtures of these gases.
- To apply the throttle.
Also see- Associated-Dissolved Natural Gas
- Biomass Gas
- Delivered Gas
- Dry Natural Gas
- Exhaust Gases
- Flash Gas
- Greenhouse Gases
- Hot Gas
- Landfill Gas
- Liquefied Natural Gas
- Liquefied Petroleum Gas
- Liquefied Refinery Gases
- Low BTU Gas
- Manufactured Gas
- Native Gas
- Natural Gas
- Nonassociated Natural Gas
- Noncondensable Gas
- Nonhydrocarbon Gases
- Non-Methane Organic Gases
- Processed Gas
- Radiatively Active Gases
- Refinery Gas
- Reformate Gas
- Residual Exhaust Gases
- Residue Gas
- Salable Natural Gas
- Sour Gas
- Still Gas
- Sweet Gas
- Synthetic Natural Gas
- Unprocessed Gas
- Vent Gases
- Wet Natural Gas
- Gas burner
- Competition vehicle with engine set up to operate on standard pump gasoline instead of an Alcohol, nitro, etc., mixture. Also called gasser.
- Gas cap
-
A vented covering on the top of the tube leading to the fuel tank. Also called fuel cap.
Gas cap
- Gas discharge headlight
- A motor vehicle Headlight with a gas discharge lamp
- Gaseous discharge headlight
- A Gas discharge light
- Gases in Bulk cargo
- Pressurized tanker item. Examples: Aerosol propellant, butane, CO2, LPG, nitrogen, and propane.
- Gas fade
- Brake fade caused by hot gases and dust particles that reduce friction between the brake linings and drum or rotor under hard, prolonged braking
- Gas filter
- A device for screening the Gasoline to remove the
impurities.
Also see
- Gas forced-air heat pipe
- High efficiency gas furnace that uses vertical liquid filled pipes. The pipes are heated by a burner at their base, and the liquid boils and vaporizes within the pipe. The furnace blower circulates air over the pipes for heating.
- Gas gauge
- An instrument, usually located on the Dashboard or center console, which indicates the amount of fuel in the Fuel tank. Most gauges have a Needle which fluctuates between E (empty) and F (full). Others show a digital readout of how many gallons or liters left in the tank. Also called fuel gauge.
- Gasification
- A method for converting coal, petroleum, biomass, wastes, or other carbon-containing materials into a gas that can be burned to generate power or processed into chemicals and fuels.
- Gasket
-
A material made of Asbestos, cardboard, cork, paper, rubber, or soft metal placed between two metal parts to insure proper sealing.
Gasket
Also see
- Gasket scraper
-
A scraper with a sharp chisel edge for removing old gasket material from a surface before installing a new gasket\
Gasket scraper
- Gas metal-arc welding
- Welding using a continuously fed consumable electrode and a shielding gas. Also called sigma welding.
- Gas, noncondensable
- Gas which will not form into a liquid under the operating pressure-temperature conditions.
- Gasohol
- A blend of Gasoline and ethanol Alcohol or methanol that usually is 90 to 94.3% Gasoline and 5.7 to 10% ethanol. This term was used in the late 1970s and early 1980s but has been largely replaced by terms such as E10, Super Unleaded Plus Ethanol or Unleaded Plus Ethanol. Ethanol is the Alcohol found in intoxicating beverages. It may attack rubber and plastic parts of Fuel systems not designed to handle alcohol-blended fuels, but it is not poisonous to human beings like wood alcohol or Methanol.
- Gasoline
- A Hydrocarbon fuel used in an
Internal combustion engine. Gasoline
is refined from crude oil which is made up of fossilized plant and animal remains.
In Britain it is called petrol.
Also see
- Aviation Gasoline
- Casing Head Gasoline
- Ethyl gasoline
- Lead-free gasoline
- Leaded gasoline
- Leaded Premium Gasoline
- Midgrade Gasoline
- Motor Gasoline
- Natural Gasoline
- Oxygenated gasoline
- Premium gasoline
- Pump gasoline
- Purple Gasoline
- Reformulated gasoline
- Regular gasoline
- Regular Grade Gasoline
- Unleaded gasoline
- Unleaded Midgrade Gasoline
- Unleaded Premium Gasoline
- Unleaded Regular Gasoline
- Gasoline blending components
- Naphthas which will be used for
blending or compounding into finished aviation or motor gasoline
(e.g., straight-run gasoline, Alkylate,
Reformate,
Benzene,
Toluene, and
Xylene). Excludes oxygenates (alcohols,
ethers), Butane, and
Pentanes plus
Also see
- Gasoline grades
- The classification of gasoline by octane ratings. Each type of
gasoline (conventional, oxygenated, and reformulated) is classified
by three grades - Regular, Midgrade, and Premium. Note: Gasoline
sales are reported by grade in accordance with their classification
at the time of sale. In general, automotive octane requirements are
lower at high altitudes. Therefore, in some areas of the United
States, such as the Rocky Mountain States, the octane ratings for
the gasoline grades may be 2 or more octane points lower.
- Regular gasoline: Gasoline having an antiknock index, i.e., octane rating, greater than or equal to 85 and less than 88. Note: Octane requirements may vary by altitude.
- Midgrade gasoline: Gasoline having an antiknock index, i.e., octane rating, greater than or equal to 88 and less than or equal to 90. Note: Octane requirements may vary by altitude.
- Premium gasoline: Gasoline having an antiknock index, i.e., octane rating, greater than 90. Note: Octane requirements may vary by altitude.
- Gasoline pump
- A device which pulls fuel from an underground storage tank into a vehicle's Gas tank.
- Gas pedal
- The device actuated by the operator's foot for increasing or decreasing the amount of fuel entering the Combustion chamber. Also called throttle pedal or accelerator.
- Gas pump
-
A device at a Service station which pulls gasoline from a storage tank (usually located underground) into the vehicle's Gas tank. Commercial units also record the amount of fuel dispensed as well as the cost.
Gas pump
- Gasser
- A vehicle which burns normal
Gasoline instead of racing fuel.
Also see
- Gassing
- The small hydrogen bubbles rising to the top of the Battery Electrolyte during Battery charging.
- Gas spring
- A pressurized, nitrogen-filled sphere, used in Hydragas and hydropneumatic suspension systems
- Gas tank
-
The container for holding or storing fuel. Also called Fuel tank.
Gas tank
- Gas to liquid
- (GTL) A process that combines the carbon and hydrogen elements in natural gas molecules to make synthetic liquid petroleum products, such as diesel fuel.
- Gas turbine
-
An internal-combustion rotating engine with one main moving part the Rotor with pinwheel-like blades attached. Air is compressed by the first rows of blades and delivered to the combustion chambers, from which the exhaust is directed to pass the remaining blades and to generate the power. Power is extremely smooth due to the absence of explosions and Reciprocating parts.
Gas Turbine
- Gas vent
- A passageway, composed of listed factory-built components assembled in accordance with the terms of listing, for conveying flue gases from gas utilization equipment or their vent connectors to the outside atmosphere.
- Gas welding
- A welding process widely used in body repair shops (now being gradually replaced
by MIG welding). Also called oxyacetylene welding.
Also see
- Gate
-
- The slotted guide for the Gearshift of an Internal combustion engine.
- The slotted guides in a shift drum.
- A Tailgate.
- GATT
- Acronym for General Agreement on Tariffs and Trade.
- Gauge
- This is the British and Canadian spelling while in the United States it is
sometimes spelled without the u (gage). It is becoming standard to use gage for
wire size and gauge for an instrument.
- An instrument or meter that registers the quantity of a substance
Also see
- Ammeter
- Auxiliary Gauge
- Boost gauge
- Bowden Gauge
- Fuel gauge
- Gas gauge
- Hydrostatic Gauge
- In-dash gauge
- Low-pressure Gauge
- Low Side Gauge
- Oil gauge
- Oil level gauge
- Oil pressure gauge
- Oil temperature gauge
- Outdoor Temperature Gauge
- Outside temperature gauge
- Pounds Per Square Inch Gauge
- Temperature gauge
- Turbo gauge
- Vacuum gauge
- Voltmeter
- Water temperature gauge
- A tool for measuring Clearances, pressures,
sizes, etc.
Also see
- Adjusting gauge
- B & S gauge
- Beta Thickness Gauge
- Birmingham Gauge
- Birmingham Wire Gauge
- Bridge Gauge
- Standard Wire Gauge
- Broad Gauge
- Brown and Sharpe Wire Gauge
- Buckley Gauge
- Caliper gauge
- Compression gauge
- Compression tester
- Depth gauge
- Dial gauge
- Disc brake gauge
- Draft Gauge
- Feeler gauge
- Frame gauge
- High-pressure Gauge
- Ignition gauge
- Micron Gauge
- Pressure Gauge
- Screw pitch gauge
- Sighting point gauge
- Spark plug gauge
- Step Feeler Gauge
- Throttle gauge
- Tire gauge
- Tire pressure gauge
- Tram gauge
- Tread depth gauge
- Vernier gauge
- Wheel alignment gauge
- A measurement of tubing.
Also see
- An instrument or meter that registers the quantity of a substance
- Gauge box
- A container which measures a known quantity of material such as cement, sand, or rocks for testing or making mixtures
- Gauge, high-pressure
- Instrument for measuring pressures in range of 0 psia to 500 psia (101.3 kPa to 3600 kPa).
- Gauge, low-pressure
- Instrument for measuring pressures in range of 0 psia to 50 psia 10 kPa to 350 kPa.
- Gauge, manifold
-
- Chamber device constructed to hold both compound and high-pressure gauges. Valves control flow of fluids through it.
- The one essential diagnostic tool required for every air conditioner service procedure. A typical gauge set includes high and low side gauges and valves for checking, measuring and controlling pressure and vacuum, and a third valve for controlling discharging, evacuation and charging procedures. Also called gauge set
- Gauntlet
- A long-sleeved leather glove used by motorcyclists to prevent wasps from flying up the sleeve, as one did to me.
- GAWR
- Acronym for Gross Axle Weight Rating -- Maximum weight an axle is rated to carry by the manufacturer. Includes both the weight of the axle and the portion of a vehicle's weight carried by the axle.
- Gaylord
- A vehicle brand of which the 1955-57 models are milestone cars.