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T1 practice questions - frequently asked questions

Plain answers about how T1 Exam Prep works: the exam, the questions, pricing, the free trial, and what you actually get.

No - and you should be wary of any site claiming otherwise. Every question here is original, written to mirror the style, difficulty, and judgment the real T1 exam tests. Each one comes with a plain-language explanation of why the right answer is right and the others aren't.

The T1 exam spans 8 domains: General Engine Diagnosis (28% of the exam); Cylinder Head and Valve Train Diagnosis and Repair (8% of the exam); Engine Block Diagnosis and Repair (8% of the exam); Lubrication and Cooling Systems Diagnosis and Repair (6% of the exam); Ignition System Diagnosis and Repair (12% of the exam); Fuel, Air Induction, and Exhaust Systems Diagnosis and Repair (12% of the exam); Emissions Control Systems Diagnosis and Repair (10% of the exam); Computerized Engine Controls Diagnosis and Repair (16% of the exam). Every practice question on this site is tagged to one of these domains.

The domains are not weighted equally on the exam. By share of the marks: General Engine Diagnosis 28%; Computerized Engine Controls Diagnosis and Repair 16%; Ignition System Diagnosis and Repair 12%; Fuel, Air Induction, and Exhaust Systems Diagnosis and Repair 12%; Emissions Control Systems Diagnosis and Repair 10%; Cylinder Head and Valve Train Diagnosis and Repair 8%; Engine Block Diagnosis and Repair 8%; Lubrication and Cooling Systems Diagnosis and Repair 6%.

The T1 exam has 60 questions and is completed in 1 hours 15 minutes. Our timed practice mirrors that length and pacing, so exam day feels familiar.

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