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SECTION 4 ASE STYLE QUIZ (A8) QUESTIONS WITH ANSWERS GRADED A+
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SECTION 4 ASE STYLE QUIZ (A8) QUESTIONS WITH ANSWERS GRADED A+
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SECTION 4 ASE STYLEQUIZ (A8) QUESTIONS
WITH ANSWERS
GRADED A+
ASE STYLE A8
Evatee 10/20/24 ASE STYLE A8
,SECTION 4 ASE STYLE QUIZ (A8) QUESTIONS
WITH ANSWERS GRADED A+
Which of the following is the ideal air-fuel ratio?
- 12:1
- 14.7:1
- 13.5:1
- 15.8:1 Answer - 14:7:1
A magnetic-pulse type CKP (crankshaft position) sensor shows infinite
resistance when tested with a DMM. Which of the following statements are
correct?
- The sensor winding is shorted
- The sensor resistance is correct
- The sensor winding is open
- This sensor cannot be checked for resistance Answer - The sensor winding is
open
Which of the following statements about emissions are correct?
- When O2 goes up CO goes up
- CO2 will be high at lambda
- NOx goes down with engine temperature
, - HC decreases due to misfires Answer - CO2 will be high at lambda
The MIL (malfunction indicator lamp) on an OBD II equipped vehicle is flashing
at idle. Technician A says this indicates a Class A misfire is occurring. Technician
B says this indicates that catalyst damage may occur. Who is correct?
- Technician A
- Technician B
- Both A and B
- Neither A or B Answer - Both A and B
Changes in STFT (short term fuel trim) are primarily driven by what sensor?
- MAF sensor
- MAP sensor
- O2 sensor
- ECT sensor Answer - O2 sensor
The pre-catalyst O2 sensor on an OBD II equipped engine is consistently
reading below 450mv. Which of these is the most likely cause?
- Cracked exhaust manifold
- Leaking fuel injector
- Leaking MAP sensor vacuum hose
- Shorted O2 sensor wiring Answer - Cracked exhaust manifold
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