Question 1

In a hybrid vehicle the ___________________ changes the high DC voltage of the battery to a high AC voltage for the electric motors.

Accepted Answer

The answer of In a hybrid vehicle the ___________________ changes...

Question 2

Which of the following statements about hydrogen is NOT true?

Accepted Answer

A)  It costs less to produce hydrogen than it does to produce gasoline. 
B)  Hydrogen is normally stored as a liquid or as a compressed gas. 
C)  Engines running on hydrogen are more efficient then gasoline. 
D)  Hydrogen is highly flammable and there is risk for an explosion.

Question 3

Methanol can be made from ______.

Accepted Answer

A)  wood 
B)  coal 
C)  natural gas 
D)  all answers are correct

Question 4

When the sulfur in fuel is burned, it combines with oxygen to form ____________________.

Accepted Answer

The answer of When the sulfur in fuel is burned,...

Question 5

Why is leaded gasoline no longer available as an automotive fuel?

Accepted Answer

The answer of Why is leaded gasoline no longer available...

Question 6

All the following statements concerning E85 automotive fuel are true EXCEPT:

Accepted Answer

A)  E85 produces less CO2 
B)  E85 produces less emissions than gasoline 
C)  E85 keeps the fuel system cleaner 
D)  E85 is more fuel efficient

Question 7

All of these statements about excessive alcohol in gasoline are correct EXCEPT:

Accepted Answer

A)  Alcohol can cause corrosion 
B)  Alcohol can cause a rich fuel mixture 
C)  Alcohol can cause drivability concerns 
D)  Alcohol can plug the fuel filter

Question 8

The diesel fuel's antiknock quality is measured by the cetane rating.

Accepted Answer

A) True 
 B)False

Question 9

Methanol is not commonly used as an automotive fuel because ______.

Accepted Answer

A)  it is not resistant to detonation 
B)  it is highly corrosive 
C)  it is expensive to manufacture 
D)  all answers are correct

Question 10

While discussing the reasons why the use of E 85 gasoline is good for consumers: Technician A says it is produced in the United States and can reduce our reliance on foreign oil. Technician B says an engine's fuel consumption is greatly reduced. Who is correct?

Accepted Answer

A)  A only 
B)  B only 
C)  both A and B 
D)  neither A nor B

Question 11

The octane rating has nothing to do with fuel economy or engine efficiency.

Accepted Answer

A) True 
 B)False

Question 12

The ideal air/fuel or stoichiometric ratio for a gasoline engine is approximately _____ pounds of air mixed with 1 pound of gasoline.

Accepted Answer

A)  12 to 13 
B)  14.1 
C)  14.7 
D)  15 to 16

Question 13

Why won't fuel cell vehicles be available for sale in the next few years?

Accepted Answer

The answer of Why won't fuel cell vehicles be available...

Question 14

Technician A says piezo material is a type of crystal that rapidly shrinks when it is exposed to electrical current. Technician B says piezo material shrinks very slowly when current to it is stopped. Who is correct?

Accepted Answer

A)  A only 
B)  B only 
C)  both A and B 
D)  neither A nor B

Question 15

____________________ is the lightest and simplest of alcohols.

Accepted Answer

The answer of ____________________ is the lightest and simplest of...

Question 16

Alcohol weighs ____ gasoline.

Accepted Answer

A)  less than 
B)  more than 
C)  the same as 
D)  none of these answers is correct

Question 17

The higher the octane rating of gasoline, the more the engine will have a tendency to knock.

Accepted Answer

A) True 
 B)False

Question 18

What chemical is added seasonally to gasoline as an anti-icing agent to prevent fuel line freeze-up in cold weather?

Accepted Answer

A)  benzene 
B)  xylene 
C)  isopropyl alcohol 
D)  MTBE [methyl tertiary butyl ether]

Question 19

Octane ratings are being discussed. Technician A says most modern engines are designed to use regular grade gasoline. Technician B says to use high octane gasoline only when an engine was designed to use it. Who is correct?

Accepted Answer

A)  A only 
B)  B only 
C)  both A and B 
D)  neither A nor B

Question 20

What does the term "carbon neutral" mean?

Accepted Answer

The answer of What does the term "carbon neutral" mean?...

Exam 28: Gasoline, Diesel, and Other Fuels

In a hybrid vehicle the ___________________ changes the high DC voltage of the battery to a high AC voltage for the electric motors.

Which of the following statements about hydrogen is NOT true?

Methanol can be made from ______.

When the sulfur in fuel is burned, it combines with oxygen to form ____________________.

Why is leaded gasoline no longer available as an automotive fuel?

All the following statements concerning E85 automotive fuel are true EXCEPT:

All of these statements about excessive alcohol in gasoline are correct EXCEPT:

The diesel fuel's antiknock quality is measured by the cetane rating.

Methanol is not commonly used as an automotive fuel because ______.

While discussing the reasons why the use of E 85 gasoline is good for consumers: Technician A says it is produced in the United States and can reduce our reliance on foreign oil. Technician B says an engine's fuel consumption is greatly reduced. Who is correct?

The octane rating has nothing to do with fuel economy or engine efficiency.

The ideal air/fuel or stoichiometric ratio for a gasoline engine is approximately _____ pounds of air mixed with 1 pound of gasoline.

Why won't fuel cell vehicles be available for sale in the next few years?

Technician A says piezo material is a type of crystal that rapidly shrinks when it is exposed to electrical current. Technician B says piezo material shrinks very slowly when current to it is stopped. Who is correct?

____________________ is the lightest and simplest of alcohols.

Alcohol weighs ____ gasoline.

The higher the octane rating of gasoline, the more the engine will have a tendency to knock.

What chemical is added seasonally to gasoline as an anti-icing agent to prevent fuel line freeze-up in cold weather?

Octane ratings are being discussed. Technician A says most modern engines are designed to use regular grade gasoline. Technician B says to use high octane gasoline only when an engine was designed to use it. Who is correct?

What does the term "carbon neutral" mean?