Quiz # 8
Lambda
Name ________________________
1. What is Lambda used for?
a.
b.
c.
d.
Control of the air/fuel mixture.
Increase Catalytic Converter efficiency
Determing how close the A/F ratio is to the stoichometric point.
Both B & C
2. Why is Lambda important?
a.
b.
c.
d.
Better fuel mileage
Lowers emissions
Better engine performance
All of the above.
3. In order to minimize harmful emissions and create peak performance, what is the acceptable
lambda range?
a.
b.
c.
d.
.890 to .120
0.980 to 1.020
.100 to .120
1.00 to 1.20
4. The air/fuel ratio is said to be rich if Lambda is?
a.
b.
c.
d.
Below .980
Above 1.00
Below 1.020
Above .980
5. The air/fuel ratio is said to be lean when Lambda is?
a.
b.
c.
d.
Above 1.020
Below 1.00
Above .980
Below 1.020
6. Of the 5 exhaust gases CO, CO2, HC, O2 & NOX which are needed to calculate Lambda?
a.
b.
c.
d.
All 5 are needed to calculate Lambda.
Only 2 of the gases can be used to calculate lambda
Any one of the 5 gases can be used to calculate lambda.
Any 4 or all 5 will do.
7. Lambda can be used to determine if a vehicle has a mixture control malfunction?
a. True
b. False