ASE T1 Domain 3: Engine Block Diagnosis and Repair Welcome to your ASE T1 Domain 3: Engine Block Diagnosis and Repair 1. ASE T1: Engine Block Diagnosis and Repair During a routine inspection of an engine block, a technician notices a white powdery substance in the water jackets. What is the MOST likely cause of this substance? A. Oil contamination in the cooling system B. Electrolysis due to improper grounding C. Combustion gases leaking into the coolant D. Additives from different types of coolant mixing None 2. ASE T1: Engine Block Diagnosis and Repair When inspecting the cylinder bores of an engine block, the technician finds a series of deep vertical scratches. What is the MOST likely cause of these scratches? A. Normal wear and tear B. Piston ring failure C. Foreign particles in the combustion chamber D. Detonation None 3. ASE T1: Engine Block Diagnosis and Repair A technician is performing a block test on an engine that is suspected to have a cracked block. The presence of which gas in the cooling system would confirm the technician's suspicion? A. Nitrogen B. Oxygen C. Hydrocarbons D. Carbon dioxide None 4. ASE T1: Engine Block Diagnosis and Repair A technician measures the out-of-round condition of the main bearing journals on an engine block and finds a variation greater than the manufacturer's specification. What should the technician do NEXT? A. Replace the crankshaft B. Perform a line bore procedure C. Polish the main bearing journals D. Check for bent connecting rods None 5. ASE T1: Engine Block Diagnosis and Repair What is the MOST likely consequence of excessively honing the cylinder walls of an aluminum engine block with silicon-impregnated (Si) cylinders? A. Increased oil consumption B. Reduced combustion chamber volume C. Removal of the silicon particles, leading to premature wear D. Increased friction between the piston rings and cylinder walls None 6. ASE T1: Engine Block Diagnosis and Repair After a complete engine rebuild, the engine exhibits low oil pressure at idle when fully warmed up. All of the following could be the cause EXCEPT: A. Excessive main bearing clearance. B. A high volume oil pump. C. Improperly seated oil pump pickup tube. D. Worn oil pump gears. None 7. ASE T1: Engine Block Diagnosis and Repair A vehicle with a recently overhauled engine is brought back to the shop with a complaint of coolant in the oil. The technician previously installed a new head gasket. Which of the following is the LEAST likely to cause this new problem? A. Warped cylinder head B. Cracked engine block C. Faulty head gasket D. Improperly torqued head bolts None 8. ASE T1: Engine Block Diagnosis and Repair Which of the following issues would MOST likely be discovered during a cold-engine compression test rather than a warm-engine compression test? A. A stuck piston ring B. A burned exhaust valve C. A cracked engine block D. A blown head gasket None 9. ASE T1: Engine Block Diagnosis and Repair A technician is diagnosing an engine with excessive oil clearance indicated by low oil pressure. Which of the following measurements would be MOST useful to determine the cause? A. Camshaft end play B. Piston-to-wall clearance C. Crankshaft end play D. Connecting rod side clearance None 10. ASE T1: Engine Block Diagnosis and Repair When checking for warpage on the deck surface of an engine block, the technician finds a significant deviation in flatness. What is the MOST appropriate action? A. Use a thicker head gasket B. Deck the block C. Apply sealant to the head gasket D. Replace the engine block None 1 out of 10 Time is Up! Time's up
