ASE L1

60 Questions | Total Attempts: 837

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Automobile Quizzes & Trivia

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Questions and Answers
  • 1. 
    All of the cylinders in a overhead cam engine have low compression.  What is the MOST LIKELY cause of this condition?
    • A. 

      Burned valves

    • B. 

      Leaking head gasket

    • C. 

      Worn piston rings

    • D. 

      Broken timing belt

  • 2. 
    A cylinder leakage test is being performed on an overhead valve v8 engine.  When air is applied to the No. 5 cylinder, a hissing noise is heard from the tailpipe. Technician A says that the cam lobe for the No. 5 exaust valve could be worn down. Technician B says that the No 5 exaust valve could be burnt.  Who is right?
    • A. 

      Technician A Only

    • B. 

      Technician B Only

    • C. 

      Both A and B

    • D. 

      Neither A or B

  • 3. 
    A customer complains that their vehicle lacks power. What would be the the first step in determining the cause of the problem?
    • A. 

      Analyze scan data

    • B. 

      Measure fuel pressure

    • C. 

      Road test the vehicle

    • D. 

      Check exaust backpressure

  • 4. 
    A engine pings excessively under load.  All of the following conditions could cause this condition EXCEPT:
    • A. 

      Missing thermostat

    • B. 

      Improper antifreeze concentration

    • C. 

      EGR valve stuck closed

    • D. 

      Missing catalytic converter

  • 5. 
    A vehicle with multiport fuel injection stalls on deceleration. Technician A says the problem could be the result of a faulty TCC solenoid.  Technician B says that a contaminated throttle body may be the cause.  Who is right?
    • A. 

      Technician A only

    • B. 

      Technician B only

    • C. 

      Both A and B

    • D. 

      Neither A or B

  • 6. 
    The ISC motor toggles back and forth at closed throttle on an overhead valve V8 with DI ignition.  A permanent magnet sensor inside the distributor is used to generate the rpm signal.  Technician A says that a loose timing change may be causing the problem technician B says that the problem may be the result of a worn distributor shaft gear.  Who is right?
    • A. 

      Tecnician A

    • B. 

      Technician B

    • C. 

      Both A and B

    • D. 

      Neither A or B

  • 7. 
    The fuel control system on the composite vehicle remains in open loop at all times.  Technician A says that this could be the result of poor connection at ECM terminal 60.  Technician B says that a faulty IAT sensor could be the problem.  Who is right?
    • A. 

      Tehnican A

    • B. 

      Technican B

    • C. 

      Both A and B

    • D. 

      Neither A or B

  • 8. 
    Once a zirconia oxygen sensor reaches operating temperature, how quickly should it  respond to changes in the air/fuel ratio?
    • A. 

      50 microseconds

    • B. 

      100 milliseconds

    • C. 

      One second

    • D. 

      1000 milliseconds

  • 9. 
    The composite vehicle will not start.  Cranking speed is above 250 rpm.  The following PIDs were observed by two technicians under KOEO conditions at closed throttle. ECT 68° F                   IAT 67° F        MAF 0.2V                   APP 1 0.5V MAP/BARO 101 kPa            LOOP OPEN     TAC 35%                    BAT 11.9V        APP 2 1.5V                 RPM 0             HO2S 1/1 0.00            HO2S 2/1 0.00 HO2S ½ 0.00              TP 1 4.50V      TP C 0.5V                   FUEL PUMP OFF Tank LEV 0%              TR P/N            LOAD 0%       Technician A says that the system is stuck in the clear flood mode.  Technician B says that a fault MAP sensor may be the cause of the no-start.  Who is right?
    • A. 

      Technician A only

    • B. 

      Technician B only

    • C. 

      Both A and B

    • D. 

      Neither A or B

  • 10. 
    The wave form shown above was captured in closed loop at 1500 rpm from the Bank 1 O2 sensor on the composite vehicle.  What can be determined by an analysis of the waveform?
    • A. 

      The engine is running lean

    • B. 

      Sensor switching frequency is too slow

    • C. 

      Sensor response time is below normal

    • D. 

      The sensor is functioning properly

  • 11. 
    The composite vehicle has an unstable idle, the MIL is on, and DTC P0300 is stored for a Random Misfire.  According to the scan data, which of the following could be the root cause of the problem? ECT 198° F                 IAT 86° F                    MAF 0.2V                   APP 1 0.5V MAP/BARO  2.3V        LOOP CLOSED        TAC 15%                   BAT 13.2V        APP 2 1.5V                  RPM 513                     HO2S 1/1 0.86         HO2S 2/1 0.78 HO2S ½ 0.51              TP 1 4.50V                  TP 2 0.5V                    Bank 1 STFT               Bank 2 STFT               Bank 1 LTFT               Bank 2 LTFT    -12%                                -9%                             -8%                                -5%    
    • A. 

      EGR valve not seating

    • B. 

      Faulty ignition coil

    • C. 

      Clogged injector

    • D. 

      Vacuum lean

  • 12. 
    All of the following statements regarding the schematic shown above are true EXCEPT:
    • A. 

      The solenoid coil receives battery power at KOEO and KOER

    • B. 

      A blown 20A fuse would result in 0 volts at ECM terminal 23

    • C. 

      The EGR valve is shown in the de-energized state

    • D. 

      The pintle position sensor is shown at approximately the 2.5V position

  • 13. 
    The composite vehicle won't shift into third gear.  Technician A says that an open NO. 2 shift solenoid (SS2) could be the problem.  Technician B says tat a poor connection at TCM terminal 75 could cause this condition.  Who is right?
    • A. 

      Technician A only

    • B. 

      Technician B only

    • C. 

      Both A and B

    • D. 

      Neither A or B

  • 14. 
    All of the following statements regarding the composite vehicle's OBD II monitors are true EXCEPT:
    • A. 

      The Comprehensive Component Moniotr is a one-trip test

    • B. 

      The Fuel Control, O2 Sensor and Misfire Monitors are run continuously

    • C. 

      The EVAP Monitor will not run if engine timperature is above 94 degree F (34 degree C)

    • D. 

      A LTFT reading of -30% could cause the Fuel Control Monitor to fail

  • 15. 
    A DTC P0420 (Low Catalyst Efficiency) is stored in memory on a vehicle with an illuminated MIL.  Technician A says that the root cause of the problem may be worn valve guide seals.  Technician B says that a leaking Exhaust system may have triggered the DTC.  Who is right?
    • A. 

      Technician A only

    • B. 

      Technician B only

    • C. 

      Both A and B

    • D. 

      Neither A or B

  • 16. 
    Refer to the schematic below to answer the following question: Technician A says that to check the voltage drop across the main relay switch contacts, the voltmeter leads should be connected between terminals B and D with there relay energized.  Technician B says that to check the voltage drop in the O2 ground circuit, the voltmeter leads should be connected between PCM terminals B15 and G101.  Who is right?
    • A. 

      Technician A only

    • B. 

      Technician B only

    • C. 

      Both A and B

    • D. 

      Neither A or B

  • 17. 
    The composite vehicle lacks power.  The engine has been recently tuned up and results from a power balance test were good.  The following snapshot of scan data was captured at 2500 rpm under no-load.  Which analysis of this information is correct? ECT 209° F                 IAT 86° F                    MAF 0.3V                   APP 1 0.65V MAP/BARO  3.6V        LOOP CLOSED       TAC 21%                    DTC NONE     APP 2 1.65V               RPM 2500                 HO2S 1/1 0.89            HO2S 2/1 0.91 HO2S ½ 0.56              TP 1 4.25V               TP 2 0.88V                  Bank 1 STFT               Bank 2 STFT               Bank 1 LTFT               Bank 2 LTFT     -13%                           -15%                           -10%                               -12%   Technician A says that the root cause of the problem may be clogged catalytic converter.  Technician B says that the problem could be the result of low fuel pressure.  Who is right?
    • A. 

      Technician A only

    • B. 

      Technician B only

    • C. 

      Both A and B

    • D. 

      Neither A or B

  • 18. 
    The following waveform was captured in closed loop at 2000 rpm from the HO2S 1/2 sensor on the composite vehicle. Technician A says that the waveform could be the result of a unintentional ground in the purge flow control circuit (Terminal 37 of the ECM).  Technician B says that a clogged PCV valve may be generating this pattern.  Who is right?
    • A. 

      Technician A only

    • B. 

      Technician B only

    • C. 

      Both A and B

    • D. 

      Neither A or B

  • 19. 
    An engine with DI ignition becomes harder to start as outside temperature drops.  Below freezing, the engine will not start at all.  Technician A says that the problem could be a faulty ignition coil.  Technician B says that the coil wire may be bad.  Who is right?
    • A. 

      Technician A only

    • B. 

      Technician B only

    • C. 

      Both A and B

    • D. 

      Neither A or B

  • 20. 
    The engine in the composite vehicle will ot start.  A preliminary diagnosis indicates thath there is o spark.  Technician A says that a defective CMP sensor could be the root cause of the problem.  Technician B says that the ignition module should be replaced.  Who is right?
    • A. 

      Technician A only

    • B. 

      Technician B only

    • C. 

      Both A and B

    • D. 

      Neither A or B

  • 21. 
    Refer to the graphic below to answer the following question: The CKP waveform shown above was taken from the composite vehicle during cranking.  Which of the following best describes the waveform?
    • A. 

      The CKP sensor is faulty.

    • B. 

      The reluctor has a chipped tooth

    • C. 

      The CKP sensor is misadjusted

    • D. 

      The patter is normal

  • 22. 
    All of the following could cause an engine with waste spark ignition to misfire EXCEPT:
    • A. 

      Low prmary circuit resistance

    • B. 

      Faulty generator

    • C. 

      Open plug wire

    • D. 

      Defective ignition control module

  • 23. 
    The composite vehicle fails a loaded mode I/M test for excessive hydrocarbons.  Which of the following is the root cause of the problem?
    • A. 

      Shorted CMP signal wire to the ECM

    • B. 

      Open CKP sensor

    • C. 

      Poor connection at ECM terminal 12

    • D. 

      Blown fuse no. 4

  • 24. 
    Two technicians are discussing the merits of a snap throttle test for evaluating ignition system performance.  Technician A says that this test is more useful for port-injected engines than it is on veheicle with throttle body injection.  Technician B says that using a spark tester is more effective way to test the ignition system.  Who is right?
    • A. 

      Technician A only

    • B. 

      Technician B only

    • C. 

      Both A and B

    • D. 

      Neither A or B

  • 25. 
    The ignition coils on the composite vehicle are being tested with and ohmmeter.  Which of the following readings is within the specifications for the secondary winding?
    • A. 

      7500Ώ

    • B. 

      11MΏ

    • C. 

      1.5Ώ

    • D. 

      8.25kΏ