AUTI 132 - M13 Chapter 11 Quiz
CO levels are highest when the vehicle is operating at the stoichiometric ratio. Group of answer choices True False
False
Oxygen levels are highest when the vehicle is operating at the stoichiometric ratio. Group of answer choices True False
False
The levels of carbon dioxide exhaust emissions are highest when the air/fuel ratio is lean. Group of answer choices True False
False
The levels of oxides of nitrogen exhaust emissions are highest when the air/fuel ratio is slightly rich. Group of answer choices True False
False
When the vehicle is running rich, oxygen levels are at their highest point. Group of answer choices True False
False
If a vehicle is repaired that failed a state emissions test for CO, what pollutant could potentially increase after the repair? Group of answer choicesHCNOXCOO2
NOX
What is the reason for wearing protective gloves when you handle the analyzer probe and sample hose after the vehicle has been running? Group of answer choices The parts are sharp. The parts can be damaged by sweat. The parts are very hot. The parts contain acids.
The parts are very hot.
A faulty spark plug wire will cause HC emissions to increase. Group of answer choices True False
True
High levels of NOX emissions may be the result of a lean air/fuel mixture. Group of answer choices True False
True
Oxides of nitrogen are always present in the exhaust stream as it leaves the combustion chamber. Group of answer choices True False
True
The three main pollutants caused by a motor vehicle are carbon monoxide, hydrocarbons, and oxides of nitrogen. Group of answer choices True False
True
Under extreme temperatures and pressures, nitrogen is forced to combine with oxygen in the combustion chamber to form oxides of nitrogen. Group of answer choices True False
True
If the emission levels on a 4-gas analyzer indicate that both O2 and HC are high and CO2 and CO are both low, what could this indicate? Group of answer choices a rich mixture a lean mixture the stoichiometric mixture none of the above
a lean mixture
If the emission levels on a 4-gas analyzer indicate that both CO and HC are high and both O2 and CO2 are low, what could this indicate? Group of answer choices a rich mixture a lean mixture the stoichiometric mixture none of the above
a rich mixture
An emissions grade dynamometer allows a repair facility to simulate vehicle: Group of answer choices acceleration steady state cruise deceleration all of the above
all of the above
Why should you operate the exhaust emissions analyzer for 15 minutes after you complete the testing? Group of answer choices to dry the moisture from the analyzer to provide longer equipment life only B both A and B
both A and B
Why should you regularly clean the water trap and change the filters of the analyzer? Group of answer choices to maintain accurate analyzer readings to prevent analyzer damage only A both A and B
both A and B
A vehicle that has failed a state emissions inspection for high CO levels may have a problem with a: Group of answer choices fuel-saturated EVAP canister defective EGR valve defective fuel filler cap none of the above
fuel-saturated EVAP canister
For every gallon of gasoline burned, about how much water leaves the tailpipe in vapor form? Group of answer choices one pint one quart three quarts one gallon
one gallon
If the emission levels on a 4-gas analyzer indicate that CO2 is high and HC, O2 and CO are all low, what could this indicate? Group of answer choices a rich mixture a lean mixture the stoichiometric mixture none of the above
the stoichiometric mixture