ASE practice test (diesel engine) T2 Exam Solved 100% Correct

A diesel engine has excessive oil consumption with no visible oil leaks. Which of these could be the cause? - ANSWER-(D) A leaking turbocharger impeller shaft seal Which of these could be the cause of blue smoke from the exhaust on a vehicle that is not equipped with an exhaust aftertreatment system? - ANSWER-(C) Worn piston rings During long uphill pulls, a delivery truck equipped with an engine protection system activates a warning light and buzzer, and the engine derates power. Which of these could be the cause? - ANSWER-(C) A partially restricted radiator core Which of these could be the cause of a loud ticking noise on a diesel engine? - ANSWER-(A) Excessive valve lash Excessive white smoke is observed coming from the exhaust. Which of these could be the cause? - ANSWER-(A) A leaking fuel injector cup A diesel engine has excessive vibration. Technician A says that binding variable geometry turbocharger (VGT) vanes could be the cause. Technician B says that a broken flywheel/flexplate could be the cause. - ANSWER-(B) B only The measurement in the setup shown indicates that a new valve is too high. Which of these steps will correct the problem? - ANSWER-(D) Remove material from the valve seat. Technician A says that debris in the cylinder head bolt holes can affect head bolt clamping force. Technician B says that using over-stretched cylinder head bolts can affect head bolt clamping force. Who is right? - ANSWER-(C) Both A and B Cylinder liner protrusion (height) that is too low can be adjusted by: - ANSWER-(C) adding cylinder liner shims. A truck engine has excessive crankcase pressure. During disassembly, the technician notices excessive wear on the cylinder walls and upper piston rings. Which of these could be the cause? - ANSWER-(B) A missing engine air filter seal While servicing an engine, the technician finds a slight amount of scoring on the engine side of the flywheel. Technician A says that excessive crankshaft endplay could be the cause. Technician B says that missing bell housing locating pins could be the cause. Who is right? - ANSWER-(A) A only