Engine Performance Final Exam Study Guide UPDATED ACTUAL Questions
and CORRECT Answers
A gasoline with too low RVP will cause which of the Flooding of spark plugs
following problems in the Winter?
The use of 10% or more ethanol can result in increased False
fuel economy.
Technician A says that the research octane number is Technician B only
lower 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?
Which of these is the result of using alcohol in gasoline? All of these can result from using alcohol additives
Technician A says Post-Detonation is the most harmful Technician B only
form of detonation. Technician B says that Pre-Detonation
is the most harmful. Which technician is correct?
Which condition is most likely to produce detonation? Too much spark advance
To avoid problems with the variation of gasoline, all True
government testing uses Indolene as a fuel during testing
procedures.
Volatility is the ability of a fuel to _____ _. Vaporize
The formula for RdON or Road Octane Number is Motor + Research / 2
determined by what methods?
Technician A says altitude has little or no effect on Technician B only
Octane ratings. Technician B says the higher the altitude
the lower the Octane needed. Which technician is
correct?
Which of the following is a fuel additive that may cause Tetraethyl Lead
neurological concerns in humans?
Technician A says that volatility is a measurement of how Technician B only
easily gasoline pours into a container. Technician B says
that Reid Vapor Pressure (RVP) is a scientific
measurement of how much pressure is exerted at 100°F.
Which technician is correct?
, Always fill gasoline cans on the ground to prevent static True
electricity.
Technician A says that some manufacturers require the Technician A only
use of "Top Tier" gasoline. Technician B says that
driveability problems may be avoided by always keeping
the fuel tank under half full. Which technician is correct?
Which of these may be caused by excessive ethanol in Run lean due to too much oxygenate
the fuel?
Winter blend gasoline ____ _. Has Higher RVP
When refueling a CNG vehicle, why is it recommended The range of the vehicle is increased
that the tank be filled to a high pressure?
A vehicle using ethanol-based fuel produces less ________ CO
as an exhaust emission.
Wear a short sleeve shirt when working with fuels, so any False
spills can be easily washed off.
Methanol is also called ____ _. All of the above
Alcohol can be produced organically when you add All answers are correct
what ingredient(s)?
Liquefied petroleum gas (LPG) is also called ____ _. Propane
What must a flex fuel vehicle be able to change based on Both ignition timing and fuel enrichment
the percentage of ethanol in the fuel tank?
A stoichiometric air/fuel ratio will produce ______ _. The least amount of emissions
Using an ethanol-enhanced or reformulated gasoline can False
result in increased fuel economy.
A flex-fuel vehicle can be identified by ____ _. Any of the above
Which is the most widely used alternative fuel? Propane
What is the maximum allowable methanol in gasoline. 5%
Methanol is an oxygenated fuel. True
and CORRECT Answers
A gasoline with too low RVP will cause which of the Flooding of spark plugs
following problems in the Winter?
The use of 10% or more ethanol can result in increased False
fuel economy.
Technician A says that the research octane number is Technician B only
lower 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?
Which of these is the result of using alcohol in gasoline? All of these can result from using alcohol additives
Technician A says Post-Detonation is the most harmful Technician B only
form of detonation. Technician B says that Pre-Detonation
is the most harmful. Which technician is correct?
Which condition is most likely to produce detonation? Too much spark advance
To avoid problems with the variation of gasoline, all True
government testing uses Indolene as a fuel during testing
procedures.
Volatility is the ability of a fuel to _____ _. Vaporize
The formula for RdON or Road Octane Number is Motor + Research / 2
determined by what methods?
Technician A says altitude has little or no effect on Technician B only
Octane ratings. Technician B says the higher the altitude
the lower the Octane needed. Which technician is
correct?
Which of the following is a fuel additive that may cause Tetraethyl Lead
neurological concerns in humans?
Technician A says that volatility is a measurement of how Technician B only
easily gasoline pours into a container. Technician B says
that Reid Vapor Pressure (RVP) is a scientific
measurement of how much pressure is exerted at 100°F.
Which technician is correct?
, Always fill gasoline cans on the ground to prevent static True
electricity.
Technician A says that some manufacturers require the Technician A only
use of "Top Tier" gasoline. Technician B says that
driveability problems may be avoided by always keeping
the fuel tank under half full. Which technician is correct?
Which of these may be caused by excessive ethanol in Run lean due to too much oxygenate
the fuel?
Winter blend gasoline ____ _. Has Higher RVP
When refueling a CNG vehicle, why is it recommended The range of the vehicle is increased
that the tank be filled to a high pressure?
A vehicle using ethanol-based fuel produces less ________ CO
as an exhaust emission.
Wear a short sleeve shirt when working with fuels, so any False
spills can be easily washed off.
Methanol is also called ____ _. All of the above
Alcohol can be produced organically when you add All answers are correct
what ingredient(s)?
Liquefied petroleum gas (LPG) is also called ____ _. Propane
What must a flex fuel vehicle be able to change based on Both ignition timing and fuel enrichment
the percentage of ethanol in the fuel tank?
A stoichiometric air/fuel ratio will produce ______ _. The least amount of emissions
Using an ethanol-enhanced or reformulated gasoline can False
result in increased fuel economy.
A flex-fuel vehicle can be identified by ____ _. Any of the above
Which is the most widely used alternative fuel? Propane
What is the maximum allowable methanol in gasoline. 5%
Methanol is an oxygenated fuel. True
