Advance auto parts Emissions assessment
When would the EGR valve release exhaust back into the system?
When the cylinders are hot
What are most vehicle emissions?
A by-product if combustion
Team member A says that an exhaust gas recirculation valve returns exhaust to the intake manifold at highway speeds team member B says the EGR valves are part of the cruise control system who is correct?
A only
Why is it important to know the location of the heated Oxygen sensor (HO2S)?
All of these
Where in the exhaust stream could a customer find heated oxygen sensors (H02S)?
Behind the catalytic converter In front of the catalytic converter
Which emission gas is colorless, odorless, and highly toxic
Carbon monoxide
According to the chart shown since 1970, several emission gases have declined, including NOX and CO what part is responsible for their reduction?
Catalytic converter
Which of the following help reduce dangerous emissions?
Catalytic converter Oxygen sensors
What would happen if engine coolant got into the exhaust?
Catalytic converter failure
Which is most likely to occur if there is a vacuum leak in the emission system?
Computer will compensate, but the car will not run as efficiently
What does EGR stand for?
Exhaust gas recirculation
The purpose of the EGR valve is to feed?
Exhaust in the intake system
When with the exhaust gas, recirculation valve likely be open?
Highway speeds
Which emission is created by the heat in the combustion process?
Nitrogen oxides
What is the best recommendation you can make to your customers to prevent emissions systems failure?
Regular maintenance of the fuel and emissions system
All of these are considered emissions systems components EXCEPT for the:
Rollover valve
Which sealant should be recommended to a customer working with their intake manifold?
Sensor safe RTV
What is an effective method of checking for leaks in evaporative emission systems?
Smoke test
A five gas analyzer reads which emissions?
Tailpipe emissions
What is the function of a catalytic converter?
To convert emission gases into carbon dioxide and water
