ASE T1 Domain 4: Lubrication and Cooling Systems Diagnosis and Repair Welcome to your ASE T1 Domain 4: Lubrication and Cooling Systems Diagnosis and Repair 1. ASE T1: Lubrication and Cooling Systems Diagnosis and Repair A technician finds that the engine oil turns milky and the coolant level drops gradually. Which of the following would NOT be a likely cause of this condition? A. Cracked cylinder head B. Faulty head gasket C. Defective radiator cap D. Leaking transmission cooler None 2. ASE T1: Lubrication and Cooling Systems Diagnosis and Repair When diagnosing an engine cooling system, a technician finds the coolant is not circulating through the system. What could be the cause of this issue if the water pump is operational? A. Thermostat stuck in the closed position B. Overfilled coolant reservoir C. Inoperative electric cooling fan D. Low coolant level None 3. ASE T1: Lubrication and Cooling Systems Diagnosis and Repair A technician has determined that the engine has low oil pressure at all engine speeds. After verifying that the oil level is correct, what is the NEXT best step to diagnose the problem? A. Replace the oil pressure sensor B. Perform an oil pressure test with a mechanical gauge C. Add an engine oil additive to increase pressure D. Replace the oil filter with a higher pressure-rated filter None 4. ASE T1: Lubrication and Cooling Systems Diagnosis and Repair An engine is experiencing overheating under load. A restricted exhaust has been ruled out. Which of the following would be the MOST likely cause? A. Clogged fuel injectors B. Insufficient engine oil level C. Faulty electric cooling fan clutch D. Collapsed lower radiator hose None 5. ASE T1: Lubrication and Cooling Systems Diagnosis and Repair When diagnosing an external oil leak at the front of the engine, which of the following components should be inspected FIRST? A. Oil pan gasket B. Timing cover seal C. Valve cover gasket D. Rear main seal None 6. ASE T1: Lubrication and Cooling Systems Diagnosis and Repair A vehicle with an electric cooling fan comes into the shop with the complaint that the fan does not operate at any temperature. What is the FIRST step in diagnosing this issue? A. Check the cooling fan fuse B. Replace the fan motor C. Test the thermostat D. Flush the cooling system None 7. ASE T1: Lubrication and Cooling Systems Diagnosis and Repair During an oil change, a technician notices that the engine oil has a very high viscosity. What could be the MOST likely cause of this condition? A. The wrong type of oil filter was used B. The engine was previously run on a high viscosity oil C. The oil has been contaminated with coolant D. Extended oil change intervals None 8. ASE T1: Lubrication and Cooling Systems Diagnosis and Repair A technician observes that the oil pressure in an engine fluctuates rapidly at idle. What is the MOST likely cause of this symptom? A. Failing oil pressure sensor B. Air entering the oil pickup tube C. Worn main bearings D. Incorrect oil filter installed None 9. ASE T1: Lubrication and Cooling Systems Diagnosis and Repair If a vehicle's engine is consistently running hotter than normal, but not overheating, which of the following could be the cause? A. An overcharged air conditioning system B. A slightly open thermostat C. An under-inflated spare tire D. A partially obstructed air filter None 10. ASE T1: Lubrication and Cooling Systems Diagnosis and Repair A "chocolate milkshake" appearance of the engine oil is noticed during an oil change. This is MOST likely due to: A. Oil oxidation from overheating B. Coolant contamination in the oil C. The presence of fuel in the oil D. Use of an incompatible oil additive None 1 out of 10 Time is Up! Time's up
