| ASE A-8 Engine Performance Certification Practice Test | |
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11. Technician A says the PCM will advance the ignition timing when it receives a voltage signal from the knock sensor. Technician B says this sensor sends an A/C signal to the PCM when it detects ping or spark knock. A. Technician A B. Technician B C. Both Technician A and B D. Neither Technician A or B |
16. A PCM uses all of these sensors to calculate engine idle except. A. Engine Coolant Temperature B. Exhaust Gas Recirculation C. Intake Air Temperature D. Throttle Position Sensor |
12. Two technicians are discussing a turbo charger. Technician A says the wastegate is used to control boost pressure. Technician B says PCM controlled systems use the MAP (manifold absolute pressure ) sensor input to cut fuel injectors when pressure exceeds specifications. Who is correct? A. Technician A B. Technician B C. Both Technician A and B D. Neither Technician A or B |
17. A vehicle is backfiring and has a lack of power. Technician A says it may be the catalytic converter and a backpressure test should be performed. Technician B says a vacuum gauge can also be used to diagnose a catalytic converter. Who is correct? A. Technician A B. Technician B C. Both Technician A and B D. Neither Technician A or B |
13. A vehicle has a momentary hesitation only during acceleration. The most likely cause of this condition is a: A. Faulty Exhaust Gas Recirculating Valve B. Faulty Oxygen Sensor C. Faulty Positive Crankcase Ventilation Valve D. Faulty Throttle Position Sensor |
18. Two technicians are discussing code P0171. Technician A says the P in the code stands for powertrain. Technician B says the 0 in the code means it is manufacturer specific. Who is correct? A. Technician A B. Technician B C. Both Technician A and B D. Neither Technician A or B |
14. Technician A says a five gas analyzer is capable of checking a vehicles emissions for oxygen. Technician B says a four gas analyzer is capable of checking a vehicles emissions for oxides of nitrogen. Who is correct? A. Technician A B. Technician B C. Both Technician A and B D. Neither Technician A or B |
19. Technician A says when the vacuum hose is disconnected from a vacuum operated fuel pressure regulator the fuel pressure should incease. Technician B says a restricted fuel return line can cause a vehicle to run lean. Who is correct? A. Technician A B. Technician B C. Both Technician A and B D. Neither Technician A or B |
15. A vehicle is blowing blue/gray smoke from its tailpipe. Technician A says this is caused by coolant burning in the combustion chamber. Technician B says this is caused by oil burning in the combustion chamber. Who is correct? A. Technician A B. Technician B C. Both Technician A and B D. Neither Technician A or B |
20. Technician A says the camshaft position sensor signals the PCM when the camshaft is at TDC on the compression stroke. Technician B says on any pick-up coil type sensors the distance between the sensor and the ring is critical. Who is correct? A. Technician A B. Technician B C. Both Technician A and B D. Neither Technician A or B |