EETC Study Guide 2026
Everything you need to pass the EETC exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 EETC Exam Format at a Glance
📚 EETC Topics to Study (21)
✍️ Sample EETC Questions & Answers
1. How does a technician correctly set the ignition coil air gap on a small engine?
With the flywheel magnets aligned under the coil armature legs, a feeler gauge of the specified thickness is placed between them and the coil is tightened so it lightly grips the gauge.
2. What are the two benefits of a two-stroke engine design?
Explanation: Two-stroke engines offer the benefits of lightweight construction and smaller size compared to their four-stroke counterparts. These characteristics make them desirable for applications where weight and space are significant considerations, such as handheld power tools, small recreational vehicles, and marine engines.
3. What symptom indicates a plugged or clogged cooling fin on an air-cooled engine?
Clogged cooling fins restrict airflow and heat dissipation, causing the engine to overheat and potentially trigger its thermal protection shutdown.
4. What symptom suggests ignition timing is too retarded (late) on a small engine?
Retarded ignition timing means combustion peaks too late in the power stroke, wasting energy as heat rather than pushing the piston, resulting in power loss and overheating.
5. In a piston-ported two-stroke engine, what two events occur simultaneously as the piston moves from Bottom Dead Center (BDC) to Top Dead Center (TDC)?
As the piston travels upward from BDC to TDC, it creates a low-pressure area in the sealed crankcase, drawing the fresh air-fuel mixture in through the intake port. At the same time, the piston is compressing the air-fuel mixture that was previously transferred into the cylinder.
6. Which of the following is a critical first step when diagnosing a 'crank, no start' condition on a modern compact diesel engine?
Modern diesel engines are heavily controlled by an Engine Control Module (ECM). Scanning for DTCs should be the first step, as a fault code can quickly direct the technician to the specific system (e.g., fuel pressure, sensor input, glow plug circuit) that is preventing the engine from starting, saving significant diagnostic time.