ASE L2 Practice Test
Fast practice, instant feedback. Timer auto-submits when time’s up.
Avg score: 75% • Most missed: “A diesel truck equipped with a JWAC (Jacket Water Aftercooler) has low power und…”

The ASE identifies Electronic Diesel Engine Diagnosis Specialist as an individual service area (L2). The electronic diesel engine diagnosis area involves the following components:
- General Inspection and Diagnosis
- Electronic Engine Controls Diagnosis
- Air Exhaust Systems Diagnosis
- Fuel Systems Diagnosis
- Emission Systems Diagnosis.

ASE L2 Practice Test
Time left 00:00
8 Questions

1. The technician gets an infinite ohms reading on the ohmmeter function of the DMM (Digital Multimeter), when measuring resistance in a circuit.  Which of the following could be the cause?
2. An active diagnostic trouble code is found on a heavy duty diesel engine with VVT (Variable Valve Timing).  Technician A says the camshaft actuator is opening the exhaust valve too early.  Technician B says a slow response could cause the engine not to meet exhaust emissions.  Who is right?
3. Which of the following measuring tools is MOST likely used to measure the temperature of the diesel exhaust gases?
4. A diesel truck equipped with a JWAC (Jacket Water Aftercooler) has low power under load. Which of the following could be the cause?
5. Technician A says you do not have to solder a repaired wire. Technician B says wire insulation damage is sometimes found where the wire passes through an opening in a metal part.  Who is right?
6. The EGR (Exhaust Gas Recirculation) system is disabled under what engine conditions?
7. Which of the following tools best measures backpressure restrictions?
8. An active diagnostic trouble code is found on a heavy duty diesel engine with VVT (Variable Valve Timing).  Technician A says the camshaft actuator is opening the exhaust valve too early.  Technician B says a slow response could cause the engine not to meet exhaust emissions.  Who is right?

⚡ Recently practiced quizzes in this topic
Live quiz activity
ASE A9 Light Vehicle Diesel Engines Test Automobile Engineering: Suspension System Automobile Engineering: Automotive Electrical System ASE A5 Brake Systems Practice Test Automobile Engineering Practice Test: Transmission System - Clutches, Gear Box, Universal Joints and Differential Motor Mechanic Exam SkillsUSA Automotive Quizbowl IC Engine Practice Test: Electronic Injection Systems Auto Mechanics Tools Automechanics
 
❤ If you liked Fatskills, consider supporting us by checking out The Life Manuals You Never Got.

🌈  Our mission is to help improve your scores in any subject and exam withonline quizzes, practice tests, study guides, & advice for students. Since 2018.
About | Explore | User Guide | Topics | Subjects | Doubt Solver | Career Aptitude Test | Answers | Free Tools | OSHA Basics Quiz | What Should We Know?
Privacy | Terms |
Without work one finishes nothing. - Ralph Waldo Emerson
© 2026 Fatskills.com

All trademarks, logos and brand names are the property of their respective owners. All company, product and service names used in this website are for identification purposes only. Use of these names, trademarks and brands does not imply endorsement.