ASE G1 Domain 1: Engine Systems Welcome to your ASE G1 Domain 1: Engine Systems 1. ASE G1: Engine Systems During a cylinder compression test, Technician A says that if all cylinders read low compression, it could indicate a timing issue. Technician B says that it could be due to a widespread gasket failure. Who is correct? A. Technician A only B. Technician B only C. Both Technician A and Technician B D. Neither Technician A nor Technician B None 2. ASE G1: Engine Systems A vehicle's engine has a rough idle and a 'check engine' light for a misfire code. The misfire is not present at higher RPMs. Which of the following could be the cause? A. Faulty fuel injector on the affected cylinder B. A clogged engine air filter C. Worn spark plugs on all cylinders D. A dirty mass air flow (MAF) sensor None 3. ASE G1: Engine Systems An engine is experiencing detonation. Which of the following could be a cause for this condition? A. Too much exhaust backpressure B. An over-retarded ignition timing C. Using fuel with a higher-than-required octane rating D. A faulty Engine Coolant Temperature (ECT) sensor reading too low None 4. ASE G1: Engine Systems When checking for an intermittent stalling issue, which of the following is the LEAST likely to be checked first? A. Idle Air Control IAC valve operation B. Fuel tank cap seal integrity C. Crankshaft position sensor signal D. Throttle body condition None 5. ASE G1: Engine Systems Which condition can cause an engine's operating temperature to rise excessively only at high speeds? A. A faulty radiator cap B. An inoperative electric cooling fan C. A partially obstructed radiator D. Low engine oil level None 6. ASE G1: Engine Systems A technician finds oil in the coolant of an engine. What is the MOST likely cause? A. A leaking head gasket B. Faulty oil filter C. Worn piston rings D. Damaged radiator hose None 7. ASE G1: Engine Systems Technician A says that a knock sensor is used to detect cylinder knocking and adjust ignition timing to prevent it. Technician B says that a knock sensor can adjust fuel pressure to prevent knocking. Who is correct? A. Technician A only B. Technician B only C. Both Technician A and Technician B D. Neither Technician A nor Technician B None 8. ASE G1: Engine Systems When a turbocharged engine is producing less boost than expected, which of the following should be checked FIRST? A. Exhaust manifold pressure B. The wastegate actuator and control system C. The intake manifold gasket for leaks D. Compression ratio of the engine None 9. ASE G1: Engine Systems In a diesel engine system, what is the main function of glow plugs? A. To increase exhaust gas temperature for emissions control B. To provide an additional fuel source for increased power C. To ignite the air/fuel mixture during the intake stroke D. To heat the combustion chamber to aid in cold starting None 10. ASE G1: Engine Systems What could cause an engine with electronic fuel injection to flood during startup? A. Insufficient fuel pressure B. Faulty coolant temperature sensor reading too high C. Intake air temperature sensor reading too low D. Stuck open fuel injectors None 1 out of 10 Time is Up! Time's up
