Question 1

In the past the limit for sulfur content in diesel fuel was 500 ppm [parts per million]. The current standard for low sulfur diesel fuel allows a maximum of _____ of sulfur in the fuel.

Accepted Answer

A)   15 ppm
B)   50 ppm
C)   100 ppm
D)   200 ppm A

Question 2

Which of the following are characteristics of burning LP-gas?

Accepted Answer

A)   quicker starting
B)   fewer hydrocarbons
C)   less carbon monoxide
D)   all answers are correct D

Question 3

Which of the following statements about P-series fuel is NOT true?

Accepted Answer

A)   It is a blend of natural gas liquids, ethanol, and biomass-derived cosolvents
B)   It is rated at 89 to 93 octane
C)   Unlike ethanol and methanol, it cannot be mixed with gasoline
D)   It produces less CO, HC, and CO2 C

Question 4

While diagnosing a diesel engine driveability problem: Technician A says that while the scan tool data is similar to that available for a gasoline engine, all diesel engine troubleshooting procedures are unique. Technician B says a cylinder power balance check can be made by checking the resistance of the engine's glow plugs. Who is correct?

Accepted Answer

A)   A only
B)   B only
C)   both A and B
D)   neither A nor B

Question 5

The volatility of gasoline affects all the following performance characteristics or driving conditions EXCEPT:

Accepted Answer

A)   cold starting and warmup
B)   vapor lock
C)   performance at higher altitudes
D)   fuel line freeze-up

Question 6

Technician A says lean ratios of 15:1 to 16:1 provide the best fuel economy. Technician B says rich mixtures have a ratio below 14.7:1 and provide more power from the engine but greater fuel consumption. Who is correct?

Accepted Answer

A)   A only
B)   B only
C)   both A and B
D)   neither A nor B

Question 7

Because diesel engines burn less fuel, they also emit less CO2.

Accepted Answer

A) True 
 B)False

Question 8

Ethanol has an octane rating of ___________________.

Accepted Answer

The answer of Ethanol has an octane rating of ___________________....

Question 9

A gasoline engine provides more torque at lower speeds than an electric motor.

Accepted Answer

A) True 
 B)False

Question 10

A fuel cell converts fuel into electricity.

Accepted Answer

A) True 
 B)False

Question 11

Technician A says that the use of methanol in internal combustion engines has declined over the years. Technician B says that the use of MTBE as a gasoline additive has declined over the years. Who is correct?

Accepted Answer

A)   A only
B)   B only
C)   both A and B
D)   neither A nor B

Question 12

Biomass fuels are those derived from nonfossil sources and produced from plant or animal
products or wastes.

Accepted Answer

A) True 
 B)False

Question 13

Excessive alcohol in the fuel may cause ______.

Accepted Answer

A)   lack of power
B)   stalling
C)   no starts
D)   all answers are correct

Question 14

Technician A says that dedicated vehicles are those designed to use one particular type of fuel. Technician B says that bi-fuel vehicles can operate solely on an alcohol-based fuel or unleaded gasoline, or a mixture of the two, which gives the driver flexibility and convenience when refilling the fuel tank Who is correct?

Accepted Answer

A)   A only
B)   B only
C)   both A and B
D)   neither A nor B

Question 15

LP-gas delivers more power than gasoline.

Accepted Answer

A) True 
 B)False

Question 16

A diesel fuel's ignition quality is measured by a ___________________ rating.

Accepted Answer

The answer of A diesel fuel's ignition quality is measured...

Question 17

Compressed natural gas (CNG) is the cleanest alternative fuel.

Accepted Answer

A) True 
 B)False

Question 18

Describe the term "Reid vapor pressure (RVP)."

Accepted Answer

The answer of Describe the term "Reid vapor pressure (RVP)."...

Question 19

Technician A says blending 10 percent ethanol into gasoline results in an increase of 2.5 to 3 octane points. Technician B says ethanol is highly corrosive and highly toxic. Who is correct?

Accepted Answer

A)   A only
B)   B only
C)   both A and B
D)   neither A nor B

Question 20

LNG [liquefied natural gas] is not a practical fuel for personal use and is only used in heavy-duty applications.

Accepted Answer

A) True 
 B)False

Exam 28: Gasoline, Diesel, and Other Fuels

In the past the limit for sulfur content in diesel fuel was 500 ppm [parts per million]. The current standard for low sulfur diesel fuel allows a maximum of _____ of sulfur in the fuel.

Which of the following are characteristics of burning LP-gas?

Which of the following statements about P-series fuel is NOT true?

The volatility of gasoline affects all the following performance characteristics or driving conditions EXCEPT:

Technician A says lean ratios of 15:1 to 16:1 provide the best fuel economy. Technician B says rich mixtures have a ratio below 14.7:1 and provide more power from the engine but greater fuel consumption. Who is correct?

Because diesel engines burn less fuel, they also emit less CO₂.

Ethanol has an octane rating of ___________________.

A gasoline engine provides more torque at lower speeds than an electric motor.

A fuel cell converts fuel into electricity.

Technician A says that the use of methanol in internal combustion engines has declined over the years. Technician B says that the use of MTBE as a gasoline additive has declined over the years. Who is correct?

Biomass fuels are those derived from nonfossil sources and produced from plant or animal products or wastes.

Excessive alcohol in the fuel may cause ______.

LP-gas delivers more power than gasoline.

A diesel fuel's ignition quality is measured by a ___________________ rating.

Compressed natural gas (CNG) is the cleanest alternative fuel.

Describe the term "Reid vapor pressure (RVP)."

Technician A says blending 10 percent ethanol into gasoline results in an increase of 2.5 to 3 octane points. Technician B says ethanol is highly corrosive and highly toxic. Who is correct?

LNG [liquefied natural gas] is not a practical fuel for personal use and is only used in heavy-duty applications.