Deck 66: Gasoline

Question 1

Winter blend gasoline ________.

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

Answer 1

All of the above

Question 2

Vapor lock can occur ________.

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

Answer 2

During both A and B

Question 3

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

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

Answer 3

Rough idle or stall

Question 4

Reformulated gasoline contains at least ________ percent oxygen by weight.

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

Question 5

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

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

Question 6

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

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

Question 7

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

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

Question 8

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

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

Question 9

Avoid topping off the fuel tank because ________.

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

Question 10

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

Question 11

Pump octane is rated by ________.

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

Question 12

A gasoline with a high driveability index is ________.

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 13

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?

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

Question 14

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?

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

Question 15

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?

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