ASE L3 Domain 2: Internal Combustion Engine Welcome to your ASE L3 Domain 2: Internal Combustion Engine 1. ASE L3: Internal Combustion Engine When diagnosing an internal combustion engine of a hybrid vehicle that intermittently fails to start, which of the following is the MOST likely cause of the problem? A. A defective high voltage battery B. A failed starter-generator control module C. A clogged fuel injector D. Inconsistent fuel pressure due to a faulty pressure regulator None 2. ASE L3: Internal Combustion Engine A hybrid vehicle with an Atkinson-cycle engine is experiencing higher than normal engine temperatures during operation. The least likely cause of this condition would be: A. A malfunctioning electric water pump B. A stuck closed thermostat C. An inefficient catalytic converter D. A faulty engine control module (ECM) None 3. ASE L3: Internal Combustion Engine Which of the following is a potential reason for a decrease in the fuel efficiency of a hybrid vehicle's internal combustion engine that is NOT related to the hybrid drive system? A. The electric motor is drawing excessive current from the battery B. There is a loss of cylinder compression C. The regenerative braking system is overcharging the battery D. The power electronics module is overheating None 4. ASE L3: Internal Combustion Engine A technician finds oil in the intake manifold of a hybrid vehicle during routine maintenance. What is the most likely cause? A. A malfunctioning positive crankcase ventilation (PCV) system B. Oil overfill during the last service C. A leaking intake manifold gasket D. Blow-by from worn piston rings None 5. ASE L3: Internal Combustion Engine On a hybrid vehicle, if a cylinder misfire is detected only during the transition from electric to internal combustion engine operation, what is the MOST likely cause? A. The hybrid battery is underperforming B. There is a delay in fuel delivery C. The ignition coils are defective D. The engine mounts are worn out None 6. ASE L3: Internal Combustion Engine A hybrid vehicle exhibits a rough idle condition only when the internal combustion engine is running. The technician should FIRST check: A. The operation of the electric drive motor B. The high voltage battery state of charge C. The engine air filter and mass air flow sensor D. The alignment of the wheels None 7. ASE L3: Internal Combustion Engine During the diagnosis of an internal combustion engine on a hybrid vehicle, a technician notices that the oil pressure light flickers at idle when the engine is warm. The FIRST step in diagnosing this issue should be to: A. Replace the oil pressure sensor B. Check the actual oil pressure with a mechanical gauge C. Add oil to the engine to the maximum fill line D. Perform an engine flush to remove potential sludge None 8. ASE L3: Internal Combustion Engine A customer reports that the internal combustion engine of their hybrid vehicle occasionally stalls when coming to a stop. Which of the following should be investigated FIRST? A. Fault codes in the electric motor control module B. The idle air control system for proper operation C. The condition of the high voltage battery cells D. Wheel speed sensor data for ABS intervention None 9. ASE L3: Internal Combustion Engine If a hybrid vehicle's internal combustion engine shows signs of reduced power and a 'pinging' noise under load, what would be the MOST likely cause? A. High resistance in the spark plug wires B. Ignition timing that is overly advanced C. A blocked EGR (Exhaust Gas Recirculation) system D. Incorrect engine oil viscosity None 10. ASE L3: Internal Combustion Engine During an inspection, it is found that the internal combustion engine of a hybrid vehicle is producing a significant amount of blue smoke from the exhaust upon startup. The MOST likely cause is: A. Overfueling due to injector leakage B. Worn valve stem seals C. A crack in the turbocharger housing D. Defective piston rings None 1 out of 10 Time is Up! Time's up
