Deck 49: Emissions Management

Question 1

Which federal agency is responsible for certifying any new commercial vehicle diesel engine before it can be operated on our highways?

A) Environmental Protection Agency (EPA)
B) Society of Automotive Engineers (SAE)
C) American Trucking Association (ATA)
D) California Air Resources Board (CARB)

Answer 1

Environmental Protection Agency (EPA)

Question 2

Who regulates and sets emissions certification standards for highway diesel engine emissions in the state of California?

A) California Trucking Association
B) California Better Business Bureau
C) California Consumer Protection Agency
D) California Air Research Board

Answer 2

California Air Research Board

Question 3

What are the root words of smog?

A) sulfur and ozone
B) smile and ogle
C) smoke and fog
D) smolder and ogre

Answer 3

smoke and fog

Question 4

A chemical process initiated by the absorption of light is known as what type of reaction?

A) redux
B) photochemical
C) galvanic
D) oxidation

Question 5

What type of smog is created primarily by the burning of heavy fossil fuels such as coal and heavy oils?

A) photosynthetic
B) ozone
C) sulfur dioxide
D) particulate matter

Question 6

Which component in photochemical smog is known to be highly toxic in low concentrations?

A) ambient oxygen
B) nitrous oxide
C) monatomic oxygen
D) ozone

Question 7

If theoretically perfect combustion takes place in an engine cylinder using a diesel fuel, what should result from the reaction out the tailpipe?

A) nitrogen and oxygen
B) water and carbon dioxide
C) hydrocarbons and NOx
D) particulate matter (PM) and carbon

Question 8

Which of the following ingredients and conditions are required to produce photochemical smog?

A) sulfur, PM and high humidity
B) coal dust and carbon dioxide
C) HC+NOx+sunlight+time
D) PM and VOCs

Question 9

Which city in the United States has been noted to have a major problem with photochemical smog?

A) Detroit, MI
B) Chicago, IL
C) Los Angeles, CA
D) Houston, TX

Question 10

Which of the following tailpipe emissions were in 2008 been classified by the Supreme Court as a pollutant?

A) carbon monoxide
B) carbon dioxide
C) sulfur dioxide
D) oxides of nitrogen

Question 11

What is the source of most VOCs (volatile organic compounds) emitted from an on-highway vehicle?

A) operation of engines at high temperatures
B) lugging an engine
C) idling in traffic
D) refueling and boil-off from vehicle tanks

Question 12

Which of the following is NOT true of carbon monoxide?

A) combustible
B) odorless
C) poisonous
D) not classified as a pollutant

Question 13

What tailpipe emission from a diesel engine is likely to increase under lean burn operation?

A) PM
B) NOx
C) VOCs
D) CO

Question 14

If a diesel engine is run with a rich air-fuel-ratio, which of the following tailpipe emissions would be likely to increase?

A) HC
B) NOx
C) sulfur dioxide
D) nitrogen dioxide

Question 15

Technician A says that carbon dioxide is classified as a greenhouse gas (GHG). Technician B says that water vapor produced by combusting HC fuel is not classified as a GHG because it is harmless. Who is right?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 16

When a reduction catalytic converter is used on a current diesel engine, which of the following emissions would it be attempting to minimize?

A) NOx
B) CO
C) carbon dioxide
D) sulfur dioxide

Question 17

Which of the following exhaust aftertreatment devices have been proven to significantly lower NOx emissions in highway diesel engines?

A) selective catalytic reduction (SCR)
B) diesel particulate filters (DPFs)
C) oxidation catalysts
D) particulate traps

Question 18

Which of the following is true of a cooled exhaust gas recirculation (C-EGR) system on a truck diesel engine?

A) lowers HC emissions
B) lowers NOx emissions
C) lowers both HC and NOx emissions
D) improves engine efficiency

Question 19

Technician A says that DPFs requiring fuel dosing can be managed by a dosing control module. Technician B says that DPF dosing cycles can be managed directly by the ECM. Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 20

Technician A says that when fuel is being dosed to a DPF, the unit is being passively regenerated. Technician B says that when fuel is being dosed to a DPF, the unit is being actively regenerated. Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question 21

What percentage of urea is contained in the aqueous urea solution known as diesel exhaust fluid (DEF)?

A) 0.005%
B) 32.5%
C) 67.5%
D) 90%

Question 22

Which of the following is another term used to describe the aqueous urea solution known as DEF?

A) ammonia
B) urea
C) AdBlue
D) dosing fuel

Question 23

What do some current engines use to assist closed crankcase ventilation (CCV) emissions?

A) gas-sealed crankcase
B) electrostatic oil separator (EOS)
C) oxidation catalyst
D) HC reduction catalyst

Question 24

Which of the following is a component of the EPA Highway Rule regulation schedule for implementation by MY 2027?

A) GHG reduction
B) Increased fuel efficiency
C) Improved aerodynamics
D) All of the above

Question 25

Which of the following is a key to reducing carbon dioxide emissions from the combustion of diesel fuel?

A) Dilution of diesel with alcohol
B) Advancing injection timing
C) Improving fuel economy
D) Use of more powerful engine computer

Question 26

?When the term new technology diesel engine (NTDE) is used in the context of a highway compliant diesel, to what does it refer?

A) ?Engines certified for MY1997 emissions
B) ?Engines certified for MY 2010 emissions
C) ?Engines equipped with VGTs
D) ?Engines equipped with CACs

Question 27

?Which of the following explanations accurately defines the term freight efficiency as it is used in the trucking industry?

A) ?Fuel economy
B) ?Miles per gallon
C) ?Maximum use of cargo space
D) ?Fuel consumed per ton hauled

Question 28

When the term legacy truck is used by the trucking industry with reference to tailpipe emissions, what is being referred to??

A) ?EPA certified before MY 2007
B) ?EPA certified before MY 2004
C) ?EPA certified after MY 2016
D) ?EPA certified after MY 2013

Question 29

What is a seventh injector used for??

A) ?Injecting DEF for DPF regeneration
B) ?Injecting H₂O for DPF cooling
C) ?Injecting diesel fuel for DPF regeneration
D) ?Injecting diesel fuel for SCR operation

Question 30

Technician A says that SCR systems use DEF which results in toxic levels of ammonia being emitted from the tailpipe. Technician B says that Navistar engines certified for EPA MY 2013 and later use SCR systems. Who is correct??

A) ?Technician A only
B) ?Technician B only
C) ?Both A and B
D) ?Neither A nor B