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ASE Maintenance & Light Repair

G1 Auto Maintenance & Light Repair — practice test

Studying for G1 (Auto Maintenance & Light Repair)? Overhaul Prep has 160 verified G1 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.

160G1 questions
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9,711questions in total
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Sample G1 questions

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

The primary purpose of the PCV (positive crankcase ventilation) system is to:

  1. Route crankcase blow-by vapors into the intake to be burned
  2. Increase fuel pressure at high RPM
  3. Cool the engine oil in the crankcase
  4. Filter incoming air before the throttle body
WhyPCV uses manifold vacuum to draw blow-by gases from the crankcase and route them into the intake to be reburned, reducing emissions and preventing sludge and pressure buildup.

Two technicians discuss brake fluid. Technician A says DOT 3 and DOT 4 fluids absorb moisture over time, which lowers the boiling point. Technician B says brake fluid should be serviced periodically because absorbed moisture can cause internal corrosion. Who is correct?

  1. Technician A only
  2. Technician B only
  3. Both Technicians A and B
  4. Neither Technician
WhyBoth are right: glycol brake fluid is hygroscopic, so absorbed moisture lowers the boiling point and promotes corrosion, which is why periodic fluid service is specified.

A front-wheel-drive car makes a clicking or popping noise that gets louder when turning sharply under acceleration. The MOST likely cause is:

  1. A worn timing belt
  2. A worn outer CV joint
  3. A slipping serpentine belt
  4. A restricted cabin air filter
WhyClicking that worsens on turns under power is the classic worn outer CV joint symptom, usually from a torn boot that let the grease escape.

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