ASE A1 Engine Repair Practice Test
11. An engine is leaking oil past several oil seals. Technician A says a stuck closed PCV valve would cause these leaks. Technician B says a clogged crankcase breather tube would result in this condition. Who is correct?
- A. Technician A
- B. Technician B
- C. Both A and B
- D. Neither A or B
12. Technician A says a rich air-fuel ratio can cause excessive carbon buildup on the engine's valves and pistons. Technician B says coolant entering the combustion chamber from a faulty head gasket produces excessive carbon buildup on the piston crown. Who is correct?
- A. Technician A
- B. Technician B
- C. Both A and B
- D. Neither A or B
13. Technician A says piston pin offset locates the piston pin slightly closer to the thrust side of the engine. Technician B says piston side thrust mainly occurs during the power stroke. Who is correct?
- A. Technician A
- B. Technician B
- C. Both A and B
- D. Neither A or B
14. The skirt on one of an engine's pistons has excessive wear. Which of the following could be the cause?
- A. Worn piston rings.
- B. A clogged PCV valve.
- C. A bent connecting rod.
- D. Worn crankshaft bearings.
15. Technician A says VVT variable valve timing controls valve timing independent of crankshaft rotation. Technician B says thick contaminated oil will affect the operation of a VVT engine. Who is correct?
- A. Technician A
- B. Technician B
- C. Both A and B
- D. Neither A or B
