Emission Standards and Testing

A dizzy feeling or a headache could indicate the presence of carbon monoxide (CO).

-True

-False

• True

• False

A vehicle being inspected under an OBD-II testing program and the MIL is ON. What will be the results of the inspection?

-The vehicle will fail the test.

-The vehicle will pass the test.

-The vehicle will receive an 80% pass rate.

-None of these

• The vehicle will fail the test

• The vehicle will pass the test

• The vehicle will receive an 80% pass rate

• None of these

A vehicle is undergoing a SHED test. What is being measured?

-Evaporative emissions

-Tail pipe gasses

-Lighting pollution

-Zero emissions

• Evaporative emissions

• Tail pipe gasses

• Lighting pollution

• Zero emissions

After the following exhaust emissions were measured, how was the engine operating? HC=766 PPM CO2=8.2% CO=4.6% O2=0.1%

-Too rich

-Too lean

• Too rich

• Too lean

All of the gasses are measured in percentages EXCEPT ________.

-HC

-CO

-CO2

-O2

• HC

• CO

• CO2

• O2

An ignition fault could cause excessive ________ exhaust emissions

-HC

-CO

-NOx

-CO2

• HC

• CO

• NOx

• CO2

HC and CO are high and CO2 and O2 are low. This could be caused by a ________.

-Rich mixture

-Lean mixture

-Defective ignition component

-Clogged EGR passage

• Rich mixture

• Lean mixture

• Defective ignition component

• Clogged EGR passage

Most high mileage vehicles cannot pass an exhaust emission test.

-True

-False

• True

• False

NOx readings at idle should be less than ________.

-100 ppm

-10 ppm

-1 ppm

-None of these is correct

• 100 ppm

• 10 ppm

• 1 ppm

• None of these is correct

OBD-II equipped vehicles are required to turn on the malfunction indicator lamp if the system has detected an exhaust emission level that is ________ the FTP limit.

-1.5 times or higher than

-The same as

-1.5 times less than

-None of these

• 1.5 times or higher than the FTP limit

• The same as

• 1.5 times less than

• None of these