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ASE Medium / Heavy Truck

T8 Preventive Maintenance Inspection (PMI) — practice test

Studying for T8 (Preventive Maintenance Inspection (PMI))? Overhaul Prep has 107 verified T8 questions written to the current task list — in the same formats the real exam uses (direct, Technician A/B, EXCEPT and most-likely-cause). Every answer comes with a written explanation, so you learn why instead of memorising a letter.

107T8 questions
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Sample T8 questions

Straight from the bank — answers highlighted, with the explanation underneath.

Federal (FMCSA) rules require a documented periodic inspection of a commercial motor vehicle at least:

  1. Once per week
  2. Once every 90 days
  3. Once every 12 months (annually)
  4. Only when a defect is reported
WhyFMCSA requires each CMV to pass a periodic (annual) inspection at least once every 12 months, with records retained. Drivers also perform daily pre-/post-trip inspections; PMI programs are typically more frequent than the annual minimum.

During a PMI brake inspection, Technician A says brake chamber pushrod stroke should be measured and compared to the adjustment limit. Technician B says any air leak that fails the leak-down test must be repaired before release. Who is correct?

  1. Technician A only
  2. Technician B only
  3. Both Technicians A and B
  4. Neither Technician
WhyBoth. PMI requires measuring pushrod stroke against the applicable limit (out-of-adjustment brakes are out-of-service) and repairing air leaks that exceed the allowable leak-down rate before the truck goes back in service.

During PMI, the technician finds the engine oil overfull and smelling of diesel fuel. This MOST likely indicates:

  1. Normal condition
  2. Fuel dilution from a leaking injector or excessive idling/regen issues
  3. Coolant leak
  4. Too little oil added
WhyA rising oil level that smells of fuel means fuel is leaking past an injector (or from failed post-injection dosing) into the crankcase. Fuel dilution destroys oil film strength — find the source and change the oil.

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