Engine Tune Up QUESTIONS & ANSWERS 2024 ( A+
GRADED 100% VERIFIED)
1.The engine vacuum is low but steady: Retarded Timing
2.The Purpose of catalytic converter: oxidize hc co into c02 and h20
3.What vehicles are designed to go into a closed loop operation when: all of the above
4.Diagram shows a vacuum hose connected to "p vacuum" this means the hose
should be connected: above the throttle plate
5.If the voltage spike is not high enough on one cylinder, what is the most likely
source of the problem.: a failed spark plug
6.wide-open-throttle the power train control module reverts: open loop, rich mixtures
7.during a cylinder leakage test air escaping through the throttle body means there
is a leak at: the intake valve
8.higher than normal oxides of nitrogen (n0x) emissions may be caused by: all of the
above
9.A reading of 8 volts on meter 2 while cranking would indicate: an excessive ground
circuit voltage drop
10.emission control systems are installed on engines to reduce what 3 specific
exhaust products: Hydrocarbons, carbon monoxide and oxides of nitrogen
11. You have verified a slow cranking complaint, which of the following should you
do next: Determine the condition of the battery
12. The Egr System is designed to: cruise
13. You are monitoring the tps signed voltage digital volt ohm: A smooth voltage
increase to about 4.5 v
14. an electronic fuel injected system that sprays into the throat of intake: a throttle
body injections system
15. What is the function of the egr valve: it recalculates exhaust gasses into the intake
16. A customer brings vehicle to you with a concern of low power: all of the above
17. A reading of 1v on meter number 1 cranking: Do acceptable voltage drop
18. You are checking the 02 during closed loop 450 to 500: the sensor is sluggish and
probably bad
19. A car with dis will not start: A defective or misalignment crank sensor
20. How is fuel pressure controlled in a electric efl: Engine vacuum
21. A vehicle with OBD 2 is being check for poor performance and low power with
check engine light flashing: detecting a misfire condition
22. A weak ignition coil would most likely: B
23. A car will not start because of spark: Check for primary circuit at coil
24. You suspect that the timing chain or belt is jumped or broken: all of the above
25. If the ignition timing will not advance past base timing: vehicle in limp mode
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GRADED 100% VERIFIED)
1.The engine vacuum is low but steady: Retarded Timing
2.The Purpose of catalytic converter: oxidize hc co into c02 and h20
3.What vehicles are designed to go into a closed loop operation when: all of the above
4.Diagram shows a vacuum hose connected to "p vacuum" this means the hose
should be connected: above the throttle plate
5.If the voltage spike is not high enough on one cylinder, what is the most likely
source of the problem.: a failed spark plug
6.wide-open-throttle the power train control module reverts: open loop, rich mixtures
7.during a cylinder leakage test air escaping through the throttle body means there
is a leak at: the intake valve
8.higher than normal oxides of nitrogen (n0x) emissions may be caused by: all of the
above
9.A reading of 8 volts on meter 2 while cranking would indicate: an excessive ground
circuit voltage drop
10.emission control systems are installed on engines to reduce what 3 specific
exhaust products: Hydrocarbons, carbon monoxide and oxides of nitrogen
11. You have verified a slow cranking complaint, which of the following should you
do next: Determine the condition of the battery
12. The Egr System is designed to: cruise
13. You are monitoring the tps signed voltage digital volt ohm: A smooth voltage
increase to about 4.5 v
14. an electronic fuel injected system that sprays into the throat of intake: a throttle
body injections system
15. What is the function of the egr valve: it recalculates exhaust gasses into the intake
16. A customer brings vehicle to you with a concern of low power: all of the above
17. A reading of 1v on meter number 1 cranking: Do acceptable voltage drop
18. You are checking the 02 during closed loop 450 to 500: the sensor is sluggish and
probably bad
19. A car with dis will not start: A defective or misalignment crank sensor
20. How is fuel pressure controlled in a electric efl: Engine vacuum
21. A vehicle with OBD 2 is being check for poor performance and low power with
check engine light flashing: detecting a misfire condition
22. A weak ignition coil would most likely: B
23. A car will not start because of spark: Check for primary circuit at coil
24. You suspect that the timing chain or belt is jumped or broken: all of the above
25. If the ignition timing will not advance past base timing: vehicle in limp mode
1/3
