Emissions Control

25 Questions
Organization Quizzes & Trivia

Chapter 51

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Questions and Answers
  • 1. 
    True or False. The evaporative emission (EVAP) system is designed to ensure that hydrocarbons are released into the atmosphere.
    • A. 

      True

    • B. 

      False

  • 2. 
    True or False. The main concern of the evaporative emission (EVAP) system is the gas cap.
    • A. 

      True

    • B. 

      False

  • 3. 
    True or False. The illuminated malfunction indicator lamp (MIL) lets the tech know that there is an emission problem that needs to be diagnosed.
    • A. 

      True

    • B. 

      False

  • 4. 
    Emissions can be caused naturally by:
    • A. 

      Forest fires.

    • B. 

      Volcanoes.

    • C. 

      Decomposition of materials.

    • D. 

      All of the above

  • 5. 
    In automotive applications, most_______________ is/are a by-product of combustion and is/are emitted from the exhaust system.
    • A. 

      Fuel

    • B. 

      Air

    • C. 

      Emissions

    • D. 

      Catalysts

  • 6. 
    Today's vehicle technology has reduced the harmful emissions on new vehicles to almost:
    • A. 

      0%.

    • B. 

      5%.

    • C. 

      10%.

    • D. 

      15%.

  • 7. 
    The term _________________, when used in automotive circles, normally refers the pollution produced by a light vehicle during operation of the vehicle or while sitting stationary.
    • A. 

      Catalyst

    • B. 

      Compression

    • C. 

      Combustion

    • D. 

      Emission

  • 8. 
    Today's emissions come from the vehicle's:
    • A. 

      Fuel system.

    • B. 

      Crankcase.

    • C. 

      Tailpipe.

    • D. 

      All of the above

  • 9. 
    In what year did it become mandatory for all vehicles to be on-board diagnostic II (OBDII) compliant?
    • A. 

      1994

    • B. 

      1995

    • C. 

      1996

    • D. 

      1997

  • 10. 
    What does the Environmental Protection Agency (EPA) require all vehicles to have to warn the driver of an emission fault?
    • A. 

      A beeping horn

    • B. 

      An illuminated light

    • C. 

      A buzzing buzzer

    • D. 

      A ringing bell

  • 11. 
    A limit value is the maximum amount of _____________ that a vehicle is permitted to emit. 
    • A. 

      Speed

    • B. 

      Emissions

    • C. 

      Air

    • D. 

      Water

  • 12. 
    ____________ is a by-product of complete combustion, along with water.
    • A. 

      Carbon monoxide

    • B. 

      Hydrocarbons

    • C. 

      Carbon dioxide

    • D. 

      Sulfur

  • 13. 
    ____________ is created when raw fuel evaporates into the atmosphere or when it does not burn at all in the combustion chamber and is exhausted out the tail pipe.
    • A. 

      Carbon dioxide

    • B. 

      Hydrocarbons

    • C. 

      Carbon monoxide

    • D. 

      Sulfur

  • 14. 
    ______________ is a colorless, odorless, tasteless, flammable, and highly toxic gas.
    • A. 

      Carbon dioxide

    • B. 

      Hydrocarbons

    • C. 

      Carbon monoxide

    • D. 

      Sulfur

  • 15. 
    The stoichiometric ratio, also referred to as lambda, is the ratio of air to fuel at which all of the oxygen in the air and all the fuel are completely burned. The stoichiometric ratio for gasoline is:
    • A. 

      34.3:1.

    • B. 

      17.2:1.

    • C. 

      15.7:1.

    • D. 

      14.7:1.

  • 16. 
    Tech A says that closed loop is when the feedback system is ignoring the sensors. Tech B says that closed loop is when the feedback system uses all the sensors to control the PCM. Who is correct?
    • A. 

      Tech A

    • B. 

      Tech B

    • C. 

      Both Techs A and B

    • D. 

      Neither Tech A nor B

  • 17. 
    • A. 

      Tech A

    • B. 

      Tech B

    • C. 

      Both Techs A and B

    • D. 

      Neither Tech A nor B

  • 18. 
    Tech A says that hydrocarbons are created when raw fuel does not burn completely in the combustion chamber and is exhausted out the tailpipe. Tech B says that hydrocarbons are created when raw fuel evaporates into the atmosphere. Who is correct?
    • A. 

      Tech A

    • B. 

      Tech B

    • C. 

      Both Techs A and B

    • D. 

      Neither Tech A nor B

  • 19. 
    Tech A says that carbon monoxide is lethal. Tech B says never run an engine inside a closed shop without proper exhaust ventilation. Who is correct?
    • A. 

      Tech A

    • B. 

      Tech B

    • C. 

      Both Techs A and B

    • D. 

      Neither Tech A nor B

  • 20. 
    Tech A says that under high temperature and pressure of combustion, oxides of nitrogen is produced. Tech B says that oxides of nitrogen are only produced at temperatures less than 500°F. Who is correct?
    • A. 

      Tech A

    • B. 

      Tech B

    • C. 

      Both Techs A and B

    • D. 

      Neither Tech A nor B

  • 21. 
    Tech A says that during open loop operation, the engine control module (ECM) ignores the oxygen sensor signal and operates based on the last known ECM values. Tech B says that during ECM last known values, the following sensors run: manifold absolute pressure (MAP) sensor, mass airflow (MAF) sensor, throttle position sensor (TPS), and intake air temperature (IAT) sensor. Who is correct?
    • A. 

      Tech A

    • B. 

      Tech B

    • C. 

      Both Techs A and B

    • D. 

      Neither Tech A nor B

  • 22. 
    In what year was the positive crankcase ventilation (PCV) first used on vehicles' emission systems?
    • A. 

      1959

    • B. 

      1960

    • C. 

      1961

    • D. 

      1962

  • 23. 
    In what year did the catalytic convertor first make its appearance on automobiles' emission control systems?
    • A. 

      1970

    • B. 

      1971

    • C. 

      1972

    • D. 

      1973

  • 24. 
    Tech A says that the exhaust gas recirculation (EGR) valve does not function at idle. Tech B says that the EGR valve will not function during wide-open throttle (WOT). Who is correct?
    • A. 

      Tech A

    • B. 

      Tech B

    • C. 

      Both Techs A and B

    • D. 

      Neither Tech A nor B

  • 25. 
    Tech A says that the positive crankcase ventilation (PCV) system removes blow-by gases from the crankcase in a manner that is not harmful to the environment. Tech B says that the PCV system prevents the build-up of crankcase pressure. Who is correct?
    • A. 

      Tech A

    • B. 

      Tech B

    • C. 

      Both Techs A and B

    • D. 

      Neither Tech A nor B