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ASE A9 Light Vehicle Diesel Engines Test
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Avg score: 31% • Most missed: “Valve adjustment is necessary following the replacement of a:”

The ASE A9 practice exam for the Light Vehicle Diesel Engine involves the following diagnosis components: Cylinder Head and Valve Train, Engine Block, Lubrication and Cooling Systems, Air Induction and Exhaust Systems and Fuel Systems.

ASE A9 Light Vehicle Diesel Engines Test
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12 Questions

1. After cleaning a diesel block and crankshaft, what chemical should they be sprayed with?
2. Valve adjustment is necessary following the replacement of a:
3. Technician A says a weak solution of antifreeze may cause corrosion build-up in the cooling system. Technician B says engine coolants and rust inhibitors last the lifetime of the diesel engine. Who is right?
4. A diesel engine with an electronically managed solenoid pump and nozzles has an active diagnostic trouble code for a single cylinder #3 misfire with a rough idle at operating temperature. Which of the following actions could cause the problem?
5. When measuring a cylinder for taper wear, which of the following is the MOST likely place for wear?
6. Which diagnostic tool connects to the Data Link Connector and allows the technician to read light duty diesel engine diagnostic trouble codes?
7. This question has the word EXCEPT. For this question, look for the choice that would NOT fit the described situation. Read the entire question carefully before choosing your answer.

All of the following will happen when an oil filter becomes clogged, EXCEPT:
8. A light duty diesel engine has a sever oil leak at the rocker cover. The technician has replaced the rocker cover gasket but the gasket still leaks. Which of the following is the MOST likely cause?
9. The primary fuel system supply side vacuum test should be performed at which area:
10. An orange colored liquid is found under the front of the engine, which of the following fluids is leaking?
11. A Catalyzed DPF (Diesel Particulate Filter) requires oil with which of the following characteristics?
12. Two technicians are discussing engine valve seals. Technician A says to apply a light coat of engine oil to new oil seals and push them in. Technician B says you can install the intake oil seal into the exhaust side or install the exhaust oil seal into the intake side because they are interchangeable. Who is right?

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