ASE A1 Engine Repair practice questions
210 free questions with answers and explanations.
- 201.A technician is diagnosing an engine with a persistent ticking noise that is most pronounced during cold starts and tends to quiet down as the engine warms up. A stethoscope indicates the noise is coming from the top of the cylinder head. The engine uses hydraulic lifters. Which of the following is the MOST likely cause?Cylinder Head and Valve Train
- 202.An engine suffers from persistent low oil pressure despite a new oil pump being installed. Upon disassembly, the technician finds that the main bearings show signs of severe wear and have a larger than specified oil clearance. Which of the following is the MOST likely reason for the low oil pressure?Engine Block Assembly
- 203.A technician is performing a cylinder head overhaul. After removing the cylinder head, they notice significant carbon buildup on the back of the intake valves and a general darkening of the intake ports. The engine had been experiencing poor fuel economy and reduced power. Which of the following is the MOST probable cause for these observations?Cylinder Head and Valve Train
- 204.A technician is performing a valve adjustment on an overhead valve (OHV) engine with solid lifters. The service manual specifies a valve lash of 0.010 inches (0.25 mm) for the intake valves and 0.012 inches (0.30 mm) for the exhaust valves, measured with the engine cold. What is the primary reason for having a slightly larger lash specification for exhaust valves compared to intake valves?Cylinder Head and Valve Train
- 205.A technician is inspecting a crankshaft for potential reuse. They use a micrometer to measure the main journal diameter at several points around its circumference and along its length. Which of the following conditions would indicate that the journal needs to be reground or replaced?Engine Block Assembly
- 206.A technician is performing a final inspection of an engine block after machining. They are checking the main bearing housing bores for alignment. Which of the following tools is MOST appropriate for this inspection?Engine Block Assembly
- 207.A technician is performing a cylinder head overhaul and is checking the valve seats. They notice that the intake valve seat has a width of 0.050 inches (1.27 mm) and is located too high on the valve face, near the margin. The service manual specifies a seat width of 0.040-0.060 inches (1.02-1.52 mm) and contact in the middle of the valve face. Which adjustment is required to correct the seat position?Cylinder Head and Valve Train
- 208.A technician is performing a pre-assembly inspection of an engine block. They use a straightedge and feeler gauge to check the cylinder deck surface. Which of the following specifications are they measuring?Engine Block Assembly
- 209.A vehicle owner reports a strong smell of gasoline coming from their vehicle, particularly after driving. Upon inspection, the technician notices a small amount of liquid fuel on the ground under the vehicle, near the fuel tank area. Which of the following is the most likely cause?Fuel, Emissions, and Ignition Systems (General)
- 210.A technician is diagnosing a vehicle that cranks normally but will not start. They perform a basic check and confirm there is no spark at any of the spark plugs. Which of the following components should be tested first as a common cause for a no-spark condition affecting all cylinders?Fuel, Emissions, and Ignition Systems (General)