ENGINE PERFORMANCE 2
EXPECTED QUESTIONS WITH VERIFIED ANSWERS
Question 1.
Which method can be used to reprogram an engine control module?
ANSWER
Any of the above
Question 2.
Which mode of operation results in a richer air-fuel mixture near the spark plug?
ANSWER
Stratified
Question 3.
Base pulse width is determined by _________________.
ANSWER
both b and c
Question 4.
Which exhaust gas indicates efficiency? (The higher the level of this gas, the more efficient the engine
operates.)
ANSWER
CO2
Question 5.
The fuel injectors operate under a fuel pressure of about ________.
ANSWER
500 to 2,900 psi
, Question 6.
A wide-band oxygen sensor needs to be heated to what operating temperature?
ANSWER
1,400°F (760°C)
Question 7.
The voltage output of a zirconia oxygen sensor when the exhaust stream is lean (excess oxygen)
is____________.
ANSWER
relatively low (close to 0 volt)
Question 8.
Why does the PCM monitor engine oil temperature on some vehicles?
ANSWER
Used to calculate engine oil life
Question 9.
What does the electronic pressure control (EPC) solenoid use to control mainline pressure?
ANSWER
Current
Question 10.
A wide-band oxygen sensor was first used on a Honda in what model year?
ANSWER
1992
Question 11.
An oxygen sensor is being tested using a digital storage oscilloscope (DSO). A good oxygen sensor
should display how many transitions (switches) per second?
ANSWER
1 to 5
EXPECTED QUESTIONS WITH VERIFIED ANSWERS
Question 1.
Which method can be used to reprogram an engine control module?
ANSWER
Any of the above
Question 2.
Which mode of operation results in a richer air-fuel mixture near the spark plug?
ANSWER
Stratified
Question 3.
Base pulse width is determined by _________________.
ANSWER
both b and c
Question 4.
Which exhaust gas indicates efficiency? (The higher the level of this gas, the more efficient the engine
operates.)
ANSWER
CO2
Question 5.
The fuel injectors operate under a fuel pressure of about ________.
ANSWER
500 to 2,900 psi
, Question 6.
A wide-band oxygen sensor needs to be heated to what operating temperature?
ANSWER
1,400°F (760°C)
Question 7.
The voltage output of a zirconia oxygen sensor when the exhaust stream is lean (excess oxygen)
is____________.
ANSWER
relatively low (close to 0 volt)
Question 8.
Why does the PCM monitor engine oil temperature on some vehicles?
ANSWER
Used to calculate engine oil life
Question 9.
What does the electronic pressure control (EPC) solenoid use to control mainline pressure?
ANSWER
Current
Question 10.
A wide-band oxygen sensor was first used on a Honda in what model year?
ANSWER
1992
Question 11.
An oxygen sensor is being tested using a digital storage oscilloscope (DSO). A good oxygen sensor
should display how many transitions (switches) per second?
ANSWER
1 to 5
