[Shotimes] emissions question

[Robert Bruce]

PA has annual safety inspections that include emissions tests in the major
metro areas.  Emissions are reported in ppm.

Robert Bruce
93 atx street
92 track

-----Original Message-----
From: shotimes-admin@autox.team.net
[mailto:shotimes-admin@autox.team.net]On Behalf Of van Oss
Sent: Monday, April 19, 2004 4:26 PM
To: shotimes@autox.team.net
Subject: [Shotimes] emissions question


I teach public speaking.  A student gave a speech that has raised questions
about emissions testing.  Please help.  I live in a small city with no
testing.  To those who live in an area with emissions testing:

Test results, and numbers required to pass, are all expressed in terms of
percentages, are they not?  I mean, percentages as opposed to absolute
amounts of various compounds per mile?  So a vehicle with a larger volume of
exhaust output might score well on percentages, but actually put out more
total volume of these compounds --- when compared with, say,  a vehicle with
a smaller exhaust volume but percentage-wise "dirtier" emissions?

Any help appreciated.

VO
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