Question 1

Pump octane is rated by ________.

Accepted Answer

A) Motor octane only 
B) Research octane only 
C) Both A and B 
D) Neither A nor B 
A) Motor octane only 
B) Research octane only 
C) Both A and B 
D) Neither A nor B D

Question 2

To avoid problems with the variation of gasoline, all government testing uses as a fuel during testing procedures.

Accepted Answer

A) Xylene 
B) TBA (tertiary butyl alcohol) 
C) Indolene 
D) MBTE (methyl tertiary butyl ether) 
A) Xylene 
B) TBA (tertiary butyl alcohol) 
C) Indolene 
D) MBTE (methyl tertiary butyl ether) C

Question 3

Vapor lock can occur ________.

Accepted Answer

A) If a fuel line is restricted 
B) As a result of excessive heat near fuel lines 
C) During both A and B 
D) During neither A nor B 
A) If a fuel line is restricted 
B) As a result of excessive heat near fuel lines 
C) During both A and B 
D) During neither A nor B C

Question 4

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

Accepted Answer

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

Question 5

Which of these symptoms may be caused by excessive ethanol in the fuel?

Accepted Answer

A) High idle speed 
B) Late transmission shifting 
C) Rough idle or stall 
D) Poor AC performance 
A) High idle speed 
B) Late transmission shifting 
C) Rough idle or stall 
D) Poor AC performance

Question 6

Winter blend gasoline ________.

Accepted Answer

A) Can cause engine driveability problems if used during warm weather 
B) Has a higher RVP 
C) Vaporizes more easily than summer blend gasoline 
D) All of the above 
A) Can cause engine driveability problems if used during warm weather 
B) Has a higher RVP 
C) Vaporizes more easily than summer blend gasoline 
D) All of the above

Question 7

Technician A says that driveability problems may be avoided by using "Top Tier" gasoline. Technician B says that driveability problems may be avoided by always keeping the fuel tank at least one-quarter full. Which technician is correct?

Accepted Answer

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

Question 8

Technician A says that using lower octane fuel in vehicles designed for premium fuel will cause serious engine damage. Technician B says that some octane boosters will cause discoloration of the porcelain on the spark plug tip. Which technician is correct?

Accepted Answer

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

Question 9

Technician A says that volatility is a measure of how easily gasoline evaporates. Technician B says that Reid Vapor Pressure (RVP) is one way to express how volatile a gasoline mixture is. Which technician is correct?

Accepted Answer

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

Question 10

If regular-grade gasoline is used in an engine designed for premium gasoline, what might result?

Accepted Answer

A) Reduced engine power 
B) Reduced fuel economy 
C) Both A and B 
D) Neither A nor B 
A) Reduced engine power 
B) Reduced fuel economy 
C) Both A and B 
D) Neither A nor B

Question 11

Reformulated gasoline contains at least ________ percent oxygen by weight.

Accepted Answer

A) 10 
B) 2 
C) 1 
D) Zero 
A) 10 
B) 2 
C) 1 
D) Zero

Question 12

Adding up to 10% ethanol to gasoline can also increase the fuel's ________.

Accepted Answer

A) color 
B) A/F ratio 
C) temperature 
D) volatility 
A) color 
B) A/F ratio 
C) temperature 
D) volatility

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

A gasoline with a high driveability index is ________.

Accepted Answer

A) More volatile than gasoline with a lower DI 
B) Less volatile than gasoline with a lower DI 
C) DI does not describe volatility 
D) None of these 
A) More volatile than gasoline with a lower DI 
B) Less volatile than gasoline with a lower DI 
C) DI does not describe volatility 
D) None of these

Question 15

Avoid topping off the fuel tank because ________.

Accepted Answer

A) The extra fuel simply spills onto the ground 
B) The extra fuel increases vehicle weight and reduces performance 
C) It can saturate the charcoal canister 
D) The extra fuel goes into the expansion area of the tank and is not used by the engine 
A) The extra fuel simply spills onto the ground 
B) The extra fuel increases vehicle weight and reduces performance 
C) It can saturate the charcoal canister 
D) The extra fuel goes into the expansion area of the tank and is not used by the engine

Exam 66: Gasoline

Pump octane is rated by ________.

To avoid problems with the variation of gasoline, all government testing uses as a fuel during testing procedures.

Vapor lock can occur ________.

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

Which of these symptoms may be caused by excessive ethanol in the fuel?

Winter blend gasoline ________.

Technician A says that driveability problems may be avoided by using "Top Tier" gasoline. Technician B says that driveability problems may be avoided by always keeping the fuel tank at least one-quarter full. Which technician is correct?

Technician A says that using lower octane fuel in vehicles designed for premium fuel will cause serious engine damage. Technician B says that some octane boosters will cause discoloration of the porcelain on the spark plug tip. Which technician is correct?

Technician A says that volatility is a measure of how easily gasoline evaporates. Technician B says that Reid Vapor Pressure (RVP) is one way to express how volatile a gasoline mixture is. Which technician is correct?

If regular-grade gasoline is used in an engine designed for premium gasoline, what might result?

Reformulated gasoline contains at least ________ percent oxygen by weight.

Adding up to 10% ethanol to gasoline can also increase the fuel's ________.

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

A gasoline with a high driveability index is ________.

Avoid topping off the fuel tank because ________.

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