40 CFR § 92.3 - Abbreviations.

§ 92.3 Abbreviations.

The abbreviations of this section apply to all subparts of this part and have the following meanings:

ANSI - American National Standards Institute
API - American Petroleum Institute
ASTM - American Society for Testing and Materials
BHP - Brake horsepower
BSCO - Brake specific carbon monoxide
BSHC - Brake specific hydrocarbons
BSNOX - Brake specific oxides of nitrogen
°C - Celsius
cfh - cubic feet per hour
cfm - cubic feet per minute
CFV - Critical flow venturi
CL - Chemiluminescence
CO - Carbon monoxide
CO2 - Carbon dioxide
cu in - cubic inch(es)
CVS - Constant volume sampler
EP - End point
EPA - Environmental Protection Agency
°F - Fahrenheit
FEL - Family emission limit
FID - Flame ionization detector
ft - foot or feet
g - gram(s)
gal - U.S. gallon
GC - Gas Chromatograph
h - hour(s)
H2O - water
HC - hydrocarbon
HFID - Heated flame ionization detector
Hg - Mercury
hp - horsepower
IBP - Initial boiling point
in - inch(es)
K - Kelvin
kg - kilogram(s)
km - kilometer(s)
kPa - kilopascal(s)
lb - pound(s)
LPG - Liquified Petroleum Gas
m - meter(s)
max - maximum
mg - milligram(s)
mi - mile(s)
min - minute
ml - milliliter(s)
mm - millimeter
mph - miles per hour
mv - millivolt(s)
N2 - nitrogen
NDIR - Nondispersive infrared
NMHC - Non-methane hydrocarbons
NO - nitric oxide
NO2 - nitrogen dioxide
NOX - oxides of nitrogen
No. - number
O2 - oxygen
pct - percent
PM - particulate matter
ppm - parts per million by volume
ppmC - parts per million, carbon
psi - pounds per square inch
psig - pounds per square inch gauge
°R - Rankin
rpm - revolutions per minute
s - second(s)
SAE - Society of Automotive Engineers
SI - International system of units (i.e., metric)
THCE - Total hydrocarbon equivalent
U.S. - United States
V - volt(s)
vs - versus
W - watt(s)
wt - weight