Question 1

Which of these vehicle types would be classified as a ZEV vehicle?

Accepted Answer

A)  A hybrid vehicle 
B)  A fuel cell powered vehicle 
C)  An electric vehicle 
D)  Either B or C 
A)  A hybrid vehicle 
B)  A fuel cell powered vehicle 
C)  An electric vehicle 
D)  Either B or C D

Question 2

A defective or worn spark plug can cause which exhaust emission to increase?

Accepted Answer

A)  NOx 
B)  CO2 
C)  H2O 
D)  HC 
A)  NOx 
B)  CO2 
C)  H2O 
D)  HC D

Question 3

Which of the following is a measure of combustion efficiency?

Accepted Answer

A)  O2  
B)  CO 
C)  HC 
D)  CO2 
A)  O2  
B)  CO 
C)  HC 
D)  CO2 D

Question 4

Burning or watering eyes indicates excessive ________ in the vehicle exhaust.

Accepted Answer

A)  hydrocarbons 
B)  oxides of nitrogen 
C)  vacuum 
D)  air 
A)  hydrocarbons 
B)  oxides of nitrogen 
C)  vacuum 
D)  air

Question 5

NOx readings at idle should be less than ________.

Accepted Answer

A)  10 ppm 
B)  1 ppm 
C)  100 ppm 
D)  None of these is correct 
A)  10 ppm 
B)  1 ppm 
C)  100 ppm 
D)  None of these is correct

Question 6

Which EPA bin number indicates a cleaner vehicle?

Accepted Answer

A)  10 
B)  3 
C)  8 
D)  11 
A)  10 
B)  3 
C)  8 
D)  11

Question 7

LEV III emission standards started with what year vehicles?

Accepted Answer

A)  2025 
B)  1990 
C)  2015 
D)  2009 
A)  2025 
B)  1990 
C)  2015 
D)  2009

Question 8

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.

Accepted Answer

A)  the same as 
B)  1.5 times or higher than 
C)  1.5 times less than 
D)  None of these 
A)  the same as 
B)  1.5 times or higher than 
C)  1.5 times less than 
D)  None of these

Question 9

An exhaust emission test shows high CO readings. Which of these could be the cause?

Accepted Answer

A)  Non-functioning catalytic converter 
B)  Fuel pressure too high 
C)  Clogged air filter 
D)  Any of these could cause high CO readings 
A)  Non-functioning catalytic converter 
B)  Fuel pressure too high 
C)  Clogged air filter 
D)  Any of these could cause high CO readings

Question 10

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

Accepted Answer

A)  Engine operating (coolant) temperature too high 
B)  Too lean 
C)  Operating at stoichiometric ratio 
D)  Too rich 
A)  Engine operating (coolant) temperature too high 
B)  Too lean 
C)  Operating at stoichiometric ratio 
D)  Too rich

Question 11

Oxides of nitrogen results from a combination of nitrogen and ________.

Accepted Answer

A)  nitrogen 
B)  oxygen 
C)  carbon 
D)  hydrogen 
A)  nitrogen 
B)  oxygen 
C)  carbon 
D)  hydrogen

Question 12

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

Accepted Answer

A)  The vehicle will receive an 80% pass rate 
B)  The vehicle will fail the test 
C)  The vehicle will pass the test 
D)  None of these 
A)  The vehicle will receive an 80% pass rate 
B)  The vehicle will fail the test 
C)  The vehicle will pass the test 
D)  None of these

Question 13

Adding alcohol to the gasoline helps to reduce which of these emissions?

Accepted Answer

A)  O2 
B)  H2O 
C)  NOx 
D)  CO 
A)  O2 
B)  H2O 
C)  NOx 
D)  CO

Exam 26: Vehicle Emissions Standards and Testing

Which of these vehicle types would be classified as a ZEV vehicle?

A defective or worn spark plug can cause which exhaust emission to increase?

Which of the following is a measure of combustion efficiency?

Burning or watering eyes indicates excessive ________ in the vehicle exhaust.

NOx readings at idle should be less than ________.

Which EPA bin number indicates a cleaner vehicle?

LEV III emission standards started with what year vehicles?

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.

An exhaust emission test shows high CO readings. Which of these could be the cause?

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

Oxides of nitrogen results from a combination of nitrogen and ________.

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

Adding alcohol to the gasoline helps to reduce which of these emissions?

The Diagnostic Process

Gasoline, Alternative Fuels, and Diesel Fuels

Circuit Testers and Digital Meters

Oscilloscopes and Dsos

Engine Systems

In-Vehicle Engine Service

Valve Train and Variable Valve Timing Diagnosis

Engine and Misfire Diagnosis

Can and Network Communications

Onboard Diagnosis

Global Obd Ii and Mode 06

Immobilizer Systems

Starting and Charging System Diagnosis

Ignition System Operation and Diagnosis

Temperature Sensors

Throttle Position Tp Sensors

Map and Maf Sensors

Electronic Throttle Control Systems

Oxygen Sensors

Fuel Trim Diagnosis

Fuel Pumps, Lines, and Filters

Fuel-Injection Components and Operation

Gasoline Direct-Injection Systems

Fuel-Injection System Diagnosis and Service

Electronic Transmission Controls

Emission Control Devices Operation and Diagnosis

Module Reprogramming

Symptom-Based Diagnosis

Filters

NO_xreadings at idle should be less than ________.

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