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Which of the following diesel fuels is most commonly used to fuel highway trucks in North America?


A) #1D clear
B) #2D clear
C) #2D red
D) #2D blue

Correct Answer

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Which two compounds are necessary for the formation of photochemical smog?


A) nitrogen and oxygen
B) NOx and HC
C) sulfur and carbon dioxide
D) H2O and SO2

Correct Answer

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Which of the following compounds is a commonly used diesel fuel ignition accelerator?


A) cetane
B) butane
C) cyclohexanol nitrate
D) propane

Correct Answer

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What is the maximum sulfur content permitted in a diesel fuel approved for use on North American highways?


A) 0.335% S
B) 0.250% S
C) 0.05% S
D) 0.0015% S

Correct Answer

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Technician A says that by delaying refueling of truck diesel fuel tanks until the moment of departure, engine fuel problems can be minimized by ensuring that engines are always using freshest fuel. Technician B says that refueling truck diesel tanks on return from a journey is wasteful as some fuel will boil off from tanks left overnight. Who is correct?


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

Correct Answer

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