ASE T2 Domain 1: General Engine Diagnosis Welcome to your ASE T2 Domain 1: General Engine Diagnosis 1. ASE T2: General Engine Diagnosis When diagnosing an electronic diesel fuel injection system, a technician finds that the engine starts and then stalls immediately. Which of the following is MOST likely the cause? A. Faulty engine coolant temperature sensor B. Air trapped in the fuel system C. Defective exhaust back pressure sensor D. Inoperative turbocharger boost sensor None 2. ASE T2: General Engine Diagnosis A diesel engine is experiencing excessive white smoke during startup. Which of the following is LEAST likely to be the cause? A. Incorrect valve clearance B. Cracked cylinder head C. Faulty glow plugs D. Inadequate fuel supply pressure None 3. ASE T2: General Engine Diagnosis During the inspection of a diesel engine, a technician notes that the oil pressure is fluctuating erratically at all engine speeds. Which of the following could be the primary cause of this condition? A. Failing oil pump B. Worn main bearings C. Plugged oil filter D. Aerated engine oil None 4. ASE T2: General Engine Diagnosis What could be a potential cause for a diesel engine to have abnormal noise and vibration only at high RPMs? A. Loose flywheel bolts B. Worn piston rings C. Damaged harmonic balancer D. Faulty engine mounts None 5. ASE T2: General Engine Diagnosis If a technician observes oil in the coolant of a diesel engine, what is the MOST probable cause? A. A leaking turbocharger oil seal B. Faulty head gasket C. Cracked oil cooler D. Damaged radiator None 6. ASE T2: General Engine Diagnosis A diesel engine's performance has degraded over time, and the engine exhibits delayed acceleration. The fuel filter and air intake system are clean. What should be checked NEXT? A. Turbocharger operation B. EGR system C. Fuel injectors D. Compression pressure None 7. ASE T2: General Engine Diagnosis What is the MOST likely cause for a diesel engine to experience increased fuel consumption along with a noticeable decrease in power? A. Advanced fuel injection timing B. Restricted air intake filter C. Excessive exhaust back pressure D. Malfunctioning aftercooler None 8. ASE T2: General Engine Diagnosis A diesel engine with common-rail fuel injection fails to reach its normal operating temperature. Which of the following would be the LEAST likely reason for this condition? A. Thermostat stuck in the open position B. Excessive combustion blow-by C. Low coolant level D. Inoperative exhaust gas recirculation (EGR) system None 9. ASE T2: General Engine Diagnosis Which of the following symptoms would indicate a problem with the diesel engine's compression release engine brake system? A. Engine stalls when the brake is applied B. Brake applies unevenly across cylinders C. Lack of power during engine operation D. Excessive engine braking noise None 10. ASE T2: General Engine Diagnosis In a unit injector diesel system, which of the following conditions could cause one cylinder to misfire? A. A defective fuel pressure regulator B. Clogged fuel return line C. Air in the fuel system D. A faulty unit injector in the affected cylinder None 1 out of 10 Time is Up! Time's up
