GroundRules
40 CFR 86.403-78: -78 Abbreviations.
Where this section sits in the code
- Title 40—Protection of Environment
- CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY
- SUBCHAPTER C—AIR PROGRAMS
- PART 86—CONTROL OF EMISSIONS FROM NEW AND IN-USE HIGHWAY VEHICLES AND ENGINES
- Subpart E—Emission Regulations for 1978 and Later New Motorcycles, General Provisions
The abbreviations used in this subpart have the following meanings in both capital and lowercase:
ASTM—American Society for Testing and Materials.
C—Celsius.
cc—Cubic centimetre(s).
cfh—Cubic feet per hour.
cfm—Cubic feet per minute.
CH4 methane.
cm—Centimetre(s).
CO—Carbon monoxide.
CO2—Carbon dioxide.
Conc—Concentration.
cu.—Cubic.
CVS—Constant volume sampler.
EGR—Exhaust gas recirculation.
EP—End point.
EPA—Environmental Protection Agency.
F—Fahrenheit.
h—hour.
HC—Hydrocarbon(s).
Hg—Mercury.
H2O—Water.
in.—Inch(es).
K—Kelvin.
kg—Kilogram(s).
km—Kilometre(s).
kpa—Kilopascals.
lb—Pound(s).
m—Metre(s).
mph—Miles per hour.
mm—Millimetre(s).
N2—Nitrogen.
N2O nitrous oxide.
NOX—Oxides of nitrogen.
No.—Number.
O2—Oxygen.
Pa—Pascal(s).
Pb—lead.
ppm—Parts per million by volume.
psi—Pounds per square inch.
psig—Pounds per square inch gauge.
R—Rankine.
rpm—Revolutions per minute.
wt—Weight.
°—Degree(s).
%—Percent.
Collected 2026-08-27T02:26:04Z. Source file · JSON