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ENGINE PERFORMANCE II FINAL PRACTICE EXAM QUESTIONS WITH SOLVED ANSWERS!!
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ENGINE PERFORMANCE II FINAL PRACTICE EXAM QUESTIONS WITH SOLVED ANSWERS!!
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ENGINEPERFORMANCE II
FINAL PRACTICE EXAM
QUESTIONS WITH
SOLVED ANSWERS!!
ENGINE PERFORMANCE II
Evatee 10/20/24 ENGINE PERFORMANCE II
, ENGINE PERFORMANCE II FINAL PRACTICE
EXAM QUESTIONS WITH SOLVED ANSWERS!!
While discussing electronic fuel injection principles, Technician A says the
speed-density management strategy uses modifiers to achieve a base pulse
width of the fuel injectors. Technician B says the computer uses the TPS and
oxygen sensor signals to determine the air entering the engine in a speed-
density system. Who is correct? Answer - A only.
While discussing port fuel injection systems. Technician A says that in a port
fuel injection system, higher-than-normal fuel pressure causes a lean air-fuel
ratio. Technician B says that in a port fuel injection system, lower-than normal
fuel pressure causes a rich air-fuel ratio. Who is correct? Answer - Neither A
nor B.
While discussing TBI, MFI, and SFI systems, Technician A says that PCM
provides the proper air-fuel ratio by controlling fuel pressure. Technician B says
the PCM provides the proper air-fuel ratio by controlling injector pulse width.
Who is correct? Answer - B only.
All the following are advantages of gasoline direct fuel injection systems
except: Answer - More complex software program.
While discussing fuel pressure regulators, Technician A says that the pressure
regulator in a port fuel injection system maintains the same fuel pressure
regardless of throttle opening. Technician B says that the manifold vacuum
connection to the pressure regulator in a return port fuel injection system
causes higher fuel pressure at wide-open throttle. Who is correct? Answer - B
only.
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