Deck 67: Alternative Fuels

Question 1

Ethanol can be produced from what products?

A)Sugarcane
B)Switchgrass
C)Corn
D)Any of the above

Answer 1

Any of the above

Question 2

A flex-fuel vehicle uses the PCM to make adjustments to the engine according to the percentage of ethanol in the fuel. The PCM must adjust which engine settings?

A)Ignition timing
B)Quantity of fuel delivered
C)Both A and B
D)Neither A nor B

Answer 2

Both A and B

Question 3

A flex-fuel vehicle has enhanced fuel system components that include all of these EXCEPT ________.

A)Low temperature resistant O-rings
B)Corrosion resistant fuel pump
C)Stainless steel fuel rails
D)Corrosion resistant fuel injectors

Answer 3

Low temperature resistant O-rings

Question 4

Methanol is also called ________.

A)Methyl alcohol
B)Methyl hydrate
C)Wood alcohol
D)All of the above

Question 5

Which alcohol is dangerous (toxic)?

A)Both ethanol and methanol
B)Ethanol
C)Neither ethanol nor methanol
D)Methanol

Question 6

Which is the most widely used alternative fuel?

A)Propane
B)E85
C)CNG
D)M85

Question 7

Liquefied petroleum gas (LPG) is also called ________.

A)E85
B)M85
C)P-series fuel
D)Propane

Question 8

How much compressed natural gas (CNG) does it require to achieve the energy of one gallon of gasoline?

A)130 cubic feet
B)105 cubic feet
C)122 cubic feet
D)91 cubic feet

Question 9

An engine designed to burn CNG may include what design modifications?

A)Lower valve lift
B)Lighter and thinner pistons
C)Increased compression ratio
D)None of these

Question 10

Producing liquid fuel from coal or natural gas usually uses which process?

A)Fischer-Tropsch
B)P-series
C)Methanol to gasoline (MTG)
D)Syncrude

Question 11

Technician A says the stoichiometric ratio for gasoline is about 9.0:1. Technician B says the stoichiometric ratio for ethanol is about 9.0:1. Which technician is correct?

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

Question 12

Using an ethanol-enhanced or reformulated gasoline can result in reduced fuel economy.

Question 13

Of the alternative fuels listed in the text, which has the highest octane?

A)Methanol
B)Propane
C)CNG
D)Ethanol

Question 14

Technician A says vehicles capable of using 100% ethanol are known as flex fuel vehicles. Technician B says these vehicles are unable to achieve 100 horsepower. Which technician is correct?

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

Question 15

Which of these is NOT a possible effect of using gasoline with alcohol additives?

A)Reduced CO emissions
B)Increased octane
C)Increased volatility
D)All of these can result from using alcohol additives

Question 16

A vehicle burning CNG loses about ________ percent power as compared to gasoline.

A)85
B)Zero
C)10
D)40

Question 17

The stoichiometric ration for CNG is ________.

A)9 to 1
B)14.7 to 1
C)8 to 1
D)16.5 to 1