Deck 2: Gasoline, Alternative Fuels, and Diesel Fuels

Question 1

Winter-blend gasoline ________.

A) vaporizes more easily than summer-blend gasoline
B) can cause engine driveability problems if used during warm weather
C) has a higher RVP
D) All of the above

Answer 1

D

Question 2

Technician A says that spark knock, ping, and detonation are different names for abnormal combustion. Technician B says that any abnormal combustion raises the temperature and pressure inside the combustion chamber and can cause severe engine damage. Which technician is correct?

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

Answer 2

C

Question 3

Technician A says that the research octane number is higher than the motor octane number. Technician B says that the octane rating posted on fuel pumps is an average of the two ratings. Which technician is correct?

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

Answer 3

C

Question 4

What personal protective equipment should be used when working around alternative fuels?

A) Protective gloves
B) Safety glasses
C) Long-sleeved shirt and long pants
D) All of the above

Question 5

Which of the following is considered to be a synthetic or man-made fuel?

A) Fischer-Tropsch
B) E-diesel
C) P-series
D) Both A and B

Question 6

What can be used to measure the alcohol content in gasoline?

A) Graduated cylinder
B) Electronic tester
C) Scan tool
D) Either A or B

Question 7

E85 means that the fuel is made from ________.

A) 85% gasoline and 15% ethanol
B) ethanol that has 15% water
C) 85% ethanol and 15% gasoline
D) pure ethyl alcohol

Question 8

Overfilling the fuel tank can damage which component?

A) Fuel injectors
B) Fuel pump
C) Gas cap
D) Charcoal canister

Question 9

A flex-fuel vehicle can be identified by ________.

A) VIN
B) emblems on the side, front, and/or rear of the vehicle
C) VECI
D) All of the above

Question 10

When refueling a CNG vehicle, why is it recommended that the tank be filled to a high pressure?

A) Less of the fuel is lost due to evaporation.
B) The cost of the fuel is lower.
C) The range of the vehicle is increased.
D) Both A and C

Question 11

Technician A says that in going to high altitudes, engines produce lower power. Technician B says that most engine control systems can compensate the air-fuel mixture for changes in altitude. 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

Which method of blending ethanol with gasoline is the most accurate?

A) Splash
B) Sequential
C) In-line
D) All of the above

Question 13

What color is diesel fuel dyed if it is for off-road use only?

A) Green
B) Yellow
C) Red
D) Blue

Question 14

Technician A says that the use of premium high-octane gasoline in an engine designed to use regular-grade gasoline will increase engine power. Technician B says that flexible fuel vehicles are designed to operate on gasoline or gasoline-ethanol blends up to 85% ethanol. 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 gasoline should always be purchased from a busy station, and the vehicle's tank should not be overfilled. Technician B says that oxygenated fuels contain extra oxygen to help increase CO exhaust emissions. 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 16

Vapor lock can occur under which of these conditions?

A) High heat near fuel lines
B) RVP too high
C) During both A and B
D) During neither A nor B

Question 17

One should avoid topping off their fuel tank because the ________.

A) gas cap may leak due to fuel expansion
B) extra fuel simply spills onto the ground
C) charcoal canister may get saturated
D) charcoal canister may get dry

Question 18

Using E85 can result in which of these?

A) Decreased exhaust emissions
B) Increased fuel economy
C) Increased exhaust emissions
D) Reduced fuel economy

Question 19

Most regular-grade gasoline today, using the (R + M) ÷ 2 rating method, is which of these octane ratings?

A) 91
B) 85
C) 89
D) 87

Question 20

Abnormal combustion (also called detonation or spark knock) increases both the temperature and ________ inside the combustion chamber?

A) Hydrogen
B) EGR
C) Pressure
D) Carbon

Question 21

Exxon Mobil has developed a process for converting methanol (methyl alcohol) into gasoline in a process called ________.

A) MTBE (methyl tertiary butyl ether)
B) TBA (tertiary butyl alcohol)
C) ethanol-to-gasoline (ETG)
D) methanol-to-gasoline (MTG)

Question 22

Which of these procedures used to convert coal-to-liquid fuel, creates a synthetic crude, called syncrude, which is then refined to produce gasoline or diesel fuel?

A) Direct method
B) Indirect method
C) Cracking
D) Distillation

Question 23

P-series alternative fuel that is patented by Princeton University and is a non-petroleum-based fuel suitable for use in ________ vehicles or any vehicle designed to operate on E-85 (85% ethanol, 15% gasoline).

A) Ethanol
B) Methanol
C) Flexible fueled
D) Controlled Fueled

Question 24

Technician A says that gasoline is a complex blend of hydrocarbons. Technician B says that gasoline is blended for seasonal usage to achieve the correct volatility for easy starting and maximum fuel economy. 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 25

The fuel in a CNG fueled vehicle is stored at a pressure as high as 3500 PSI. The CNG is delivered to the mixture control valve at a pressure of ________.

A) 150 to 175 PSI
B) 0.5 PSI
C) 4 to 6 PSI
D) None of these

Question 26

A CNG refueling station pump is designated as a P24 filling station. This means ________.

A) it will take 24 hours to refuel, using the slow-fill method
B) the pump can refuel at a pressure of up to 2400 PSI
C) the pump can only deliver 24 gallons at a time
D) the CNG is 24% natural gas and 76% propane