Engine Performance Midterm Exam
Questions & Answers (Grade A+)
Winter-blend gasoline
a. vaporizes more easily than summer-blend gasoline
b. has a higher RVP
c. can cause engine drivability problem if used during warm
weather
d. All of the above -
correct answer ✅D
Vapor lock can occur
a. as a result of excessive hear near fuel line
b. if a fuel line is restricted
c. both a and b
d. neither a nor b -
correct answer ✅C
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?
Technician A only
,Engine Performance Midterm Exam
Questions & Answers (Grade A+)
Technician B only
Both Technicians A and B
Neither Technician A nor B -
correct answer ✅C
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?
Technician A only
Technician B only
Both Technicians A and B
Neither Technician A nor B -
correct answer ✅B
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?
Technician A only
Technician B only
, Engine Performance Midterm Exam
Questions & Answers (Grade A+)
Both Technicians A and B
Neither Technician A nor B -
correct answer ✅C
Which method of blending ethanol with gasoline is the most
accurate?
In-line
Sequential
Splash
All of the above -
correct answer ✅A
What can be used to measure the alcohol content in gasoline?
graduated cylinder
electronic tester
scan tool
either a or b -
correct answer ✅D
Questions & Answers (Grade A+)
Winter-blend gasoline
a. vaporizes more easily than summer-blend gasoline
b. has a higher RVP
c. can cause engine drivability problem if used during warm
weather
d. All of the above -
correct answer ✅D
Vapor lock can occur
a. as a result of excessive hear near fuel line
b. if a fuel line is restricted
c. both a and b
d. neither a nor b -
correct answer ✅C
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?
Technician A only
,Engine Performance Midterm Exam
Questions & Answers (Grade A+)
Technician B only
Both Technicians A and B
Neither Technician A nor B -
correct answer ✅C
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?
Technician A only
Technician B only
Both Technicians A and B
Neither Technician A nor B -
correct answer ✅B
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?
Technician A only
Technician B only
, Engine Performance Midterm Exam
Questions & Answers (Grade A+)
Both Technicians A and B
Neither Technician A nor B -
correct answer ✅C
Which method of blending ethanol with gasoline is the most
accurate?
In-line
Sequential
Splash
All of the above -
correct answer ✅A
What can be used to measure the alcohol content in gasoline?
graduated cylinder
electronic tester
scan tool
either a or b -
correct answer ✅D
